Auto merge of #52953 - dsciarra:mv-codemap-sourcemap, r=petrochenkov

Rename CodeMap/FileMap to SourceMap/SourceFile

A first renaming for #51574

27 files changed, 271 insertions, 268 deletions

diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index e53f3ea9036..ec6ac86ba6b 100644
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -16,7 +16,7 @@ pub use symbol::{Ident, Symbol as Name};
 pub use util::parser::ExprPrecedence;
 
 use syntax_pos::{Span, DUMMY_SP};
-use codemap::{dummy_spanned, respan, Spanned};
+use source_map::{dummy_spanned, respan, Spanned};
 use rustc_target::spec::abi::Abi;
 use ext::hygiene::{Mark, SyntaxContext};
 use print::pprust;
diff --git a/src/libsyntax/attr/mod.rs b/src/libsyntax/attr/mod.rs
index 5857bd282f0..cd9d7682210 100644
--- a/src/libsyntax/attr/mod.rs
+++ b/src/libsyntax/attr/mod.rs
@@ -25,7 +25,7 @@ use ast;
 use ast::{AttrId, Attribute, AttrStyle, Name, Ident, Path, PathSegment};
 use ast::{MetaItem, MetaItemKind, NestedMetaItem, NestedMetaItemKind};
 use ast::{Lit, LitKind, Expr, ExprKind, Item, Local, Stmt, StmtKind, GenericParam};
-use codemap::{BytePos, Spanned, respan, dummy_spanned};
+use source_map::{BytePos, Spanned, respan, dummy_spanned};
 use syntax_pos::{FileName, Span};
 use parse::lexer::comments::{doc_comment_style, strip_doc_comment_decoration};
 use parse::parser::Parser;
diff --git a/src/libsyntax/config.rs b/src/libsyntax/config.rs
index b4e35a9d564..0e52434ec01 100644
--- a/src/libsyntax/config.rs
+++ b/src/libsyntax/config.rs
@@ -12,7 +12,7 @@ use attr::HasAttrs;
 use feature_gate::{feature_err, EXPLAIN_STMT_ATTR_SYNTAX, Features, get_features, GateIssue};
 use {fold, attr};
 use ast;
-use codemap::Spanned;
+use source_map::Spanned;
 use edition::Edition;
 use parse::{token, ParseSess};
 use OneVector;
diff --git a/src/libsyntax/diagnostics/metadata.rs b/src/libsyntax/diagnostics/metadata.rs
index 61b0579a3e7..1438299d375 100644
--- a/src/libsyntax/diagnostics/metadata.rs
+++ b/src/libsyntax/diagnostics/metadata.rs
@@ -45,7 +45,7 @@ pub struct ErrorLocation {
 impl ErrorLocation {
     /// Create an error location from a span.
     pub fn from_span(ecx: &ExtCtxt, sp: Span) -> ErrorLocation {
-        let loc = ecx.codemap().lookup_char_pos_adj(sp.lo());
+        let loc = ecx.source_map().lookup_char_pos_adj(sp.lo());
         ErrorLocation {
             filename: loc.filename,
             line: loc.line
diff --git a/src/libsyntax/diagnostics/plugin.rs b/src/libsyntax/diagnostics/plugin.rs
index 6a5a2a5e500..d044efa3c38 100644
--- a/src/libsyntax/diagnostics/plugin.rs
+++ b/src/libsyntax/diagnostics/plugin.rs
@@ -13,7 +13,7 @@ use std::env;
 
 use ast;
 use ast::{Ident, Name};
-use codemap;
+use source_map;
 use syntax_pos::Span;
 use ext::base::{ExtCtxt, MacEager, MacResult};
 use ext::build::AstBuilder;
@@ -223,7 +223,7 @@ pub fn expand_build_diagnostic_array<'cx>(ecx: &'cx mut ExtCtxt,
                 ty,
                 expr,
             ),
-            vis: codemap::respan(span.shrink_to_lo(), ast::VisibilityKind::Public),
+            vis: source_map::respan(span.shrink_to_lo(), ast::VisibilityKind::Public),
             span,
             tokens: None,
         })
diff --git a/src/libsyntax/ext/base.rs b/src/libsyntax/ext/base.rs
index 482d8c2cf98..154fe11dd35 100644
--- a/src/libsyntax/ext/base.rs
+++ b/src/libsyntax/ext/base.rs
@@ -12,7 +12,7 @@ pub use self::SyntaxExtension::*;
 
 use ast::{self, Attribute, Name, PatKind, MetaItem};
 use attr::HasAttrs;
-use codemap::{self, CodeMap, Spanned, respan};
+use source_map::{self, SourceMap, Spanned, respan};
 use syntax_pos::{Span, MultiSpan, DUMMY_SP};
 use edition::Edition;
 use errors::{DiagnosticBuilder, DiagnosticId};
@@ -481,7 +481,7 @@ impl DummyResult {
     pub fn raw_expr(sp: Span) -> P<ast::Expr> {
         P(ast::Expr {
             id: ast::DUMMY_NODE_ID,
-            node: ast::ExprKind::Lit(P(codemap::respan(sp, ast::LitKind::Bool(false)))),
+            node: ast::ExprKind::Lit(P(source_map::respan(sp, ast::LitKind::Bool(false)))),
             span: sp,
             attrs: ThinVec::new(),
         })
@@ -836,7 +836,7 @@ impl<'a> ExtCtxt<'a> {
     pub fn new_parser_from_tts(&self, tts: &[tokenstream::TokenTree]) -> parser::Parser<'a> {
         parse::stream_to_parser(self.parse_sess, tts.iter().cloned().collect())
     }
-    pub fn codemap(&self) -> &'a CodeMap { self.parse_sess.codemap() }
+    pub fn source_map(&self) -> &'a SourceMap { self.parse_sess.source_map() }
     pub fn parse_sess(&self) -> &'a parse::ParseSess { self.parse_sess }
     pub fn cfg(&self) -> &ast::CrateConfig { &self.parse_sess.config }
     pub fn call_site(&self) -> Span {
diff --git a/src/libsyntax/ext/build.rs b/src/libsyntax/ext/build.rs
index 1a17aa3e8fb..b1bed9602f3 100644
--- a/src/libsyntax/ext/build.rs
+++ b/src/libsyntax/ext/build.rs
@@ -12,7 +12,7 @@ use rustc_target::spec::abi::Abi;
 use ast::{self, Ident, Generics, Expr, BlockCheckMode, UnOp, PatKind};
 use attr;
 use syntax_pos::{Pos, Span, DUMMY_SP};
-use codemap::{dummy_spanned, respan, Spanned};
+use source_map::{dummy_spanned, respan, Spanned};
 use ext::base::ExtCtxt;
 use ptr::P;
 use symbol::{Symbol, keywords};
@@ -764,7 +764,7 @@ impl<'a> AstBuilder for ExtCtxt<'a> {
     }
 
     fn expr_fail(&self, span: Span, msg: Symbol) -> P<ast::Expr> {
-        let loc = self.codemap().lookup_char_pos(span.lo());
+        let loc = self.source_map().lookup_char_pos(span.lo());
         let expr_file = self.expr_str(span, Symbol::intern(&loc.file.name.to_string()));
         let expr_line = self.expr_u32(span, loc.line as u32);
         let expr_col = self.expr_u32(span, loc.col.to_usize() as u32 + 1);
diff --git a/src/libsyntax/ext/derive.rs b/src/libsyntax/ext/derive.rs
index 32ace937ac0..80bbc618932 100644
--- a/src/libsyntax/ext/derive.rs
+++ b/src/libsyntax/ext/derive.rs
@@ -10,7 +10,7 @@
 
 use attr::HasAttrs;
 use ast;
-use codemap::{hygiene, ExpnInfo, ExpnFormat};
+use source_map::{hygiene, ExpnInfo, ExpnFormat};
 use ext::base::ExtCtxt;
 use ext::build::AstBuilder;
 use parse::parser::PathStyle;
diff --git a/src/libsyntax/ext/expand.rs b/src/libsyntax/ext/expand.rs
index ffa2730d686..b12b2c49caa 100644
--- a/src/libsyntax/ext/expand.rs
+++ b/src/libsyntax/ext/expand.rs
@@ -11,7 +11,7 @@
 use ast::{self, Block, Ident, NodeId, PatKind, Path};
 use ast::{MacStmtStyle, StmtKind, ItemKind};
 use attr::{self, HasAttrs};
-use codemap::{ExpnInfo, MacroBang, MacroAttribute, dummy_spanned, respan};
+use source_map::{ExpnInfo, MacroBang, MacroAttribute, dummy_spanned, respan};
 use config::{is_test_or_bench, StripUnconfigured};
 use errors::{Applicability, FatalError};
 use ext::base::*;
@@ -267,7 +267,7 @@ impl<'a, 'b> MacroExpander<'a, 'b> {
     pub fn expand_crate(&mut self, mut krate: ast::Crate) -> ast::Crate {
         let mut module = ModuleData {
             mod_path: vec![Ident::from_str(&self.cx.ecfg.crate_name)],
-            directory: match self.cx.codemap().span_to_unmapped_path(krate.span) {
+            directory: match self.cx.source_map().span_to_unmapped_path(krate.span) {
                 FileName::Real(path) => path,
                 other => PathBuf::from(other.to_string()),
             },
@@ -1355,7 +1355,7 @@ impl<'a, 'b> Folder for InvocationCollector<'a, 'b> {
                         module.directory.push(&*item.ident.as_str());
                     }
                 } else {
-                    let path = self.cx.parse_sess.codemap().span_to_unmapped_path(inner);
+                    let path = self.cx.parse_sess.source_map().span_to_unmapped_path(inner);
                     let mut path = match path {
                         FileName::Real(path) => path,
                         other => PathBuf::from(other.to_string()),
@@ -1563,7 +1563,7 @@ impl<'a, 'b> Folder for InvocationCollector<'a, 'b> {
 
                             // Add this input file to the code map to make it available as
                             // dependency information
-                            self.cx.codemap().new_filemap(filename.into(), src);
+                            self.cx.source_map().new_source_file(filename.into(), src);
 
                             let include_info = vec![
                                 dummy_spanned(ast::NestedMetaItemKind::MetaItem(
diff --git a/src/libsyntax/ext/placeholders.rs b/src/libsyntax/ext/placeholders.rs
index 1dc9bae8848..18b4119fde8 100644
--- a/src/libsyntax/ext/placeholders.rs
+++ b/src/libsyntax/ext/placeholders.rs
@@ -9,7 +9,7 @@
 // except according to those terms.
 
 use ast::{self, NodeId};
-use codemap::{DUMMY_SP, dummy_spanned};
+use source_map::{DUMMY_SP, dummy_spanned};
 use ext::base::ExtCtxt;
 use ext::expand::{AstFragment, AstFragmentKind};
 use ext::hygiene::Mark;
diff --git a/src/libsyntax/ext/quote.rs b/src/libsyntax/ext/quote.rs
index bc891700fc1..13a139deea4 100644
--- a/src/libsyntax/ext/quote.rs
+++ b/src/libsyntax/ext/quote.rs
@@ -9,7 +9,7 @@
 // except according to those terms.
 
 use ast::{self, Arg, Arm, Block, Expr, Item, Pat, Stmt, Ty};
-use codemap::respan;
+use source_map::respan;
 use syntax_pos::Span;
 use ext::base::ExtCtxt;
 use ext::base;
@@ -28,7 +28,7 @@ use tokenstream::{TokenStream, TokenTree};
 
 pub mod rt {
     use ast;
-    use codemap::Spanned;
+    use source_map::Spanned;
     use ext::base::ExtCtxt;
     use parse::{self, classify};
     use parse::token::{self, Token};
@@ -40,7 +40,7 @@ pub mod rt {
 
     pub use parse::new_parser_from_tts;
     pub use syntax_pos::{BytePos, Span, DUMMY_SP, FileName};
-    pub use codemap::{dummy_spanned};
+    pub use source_map::{dummy_spanned};
 
     pub trait ToTokens {
         fn to_tokens(&self, _cx: &ExtCtxt) -> Vec<TokenTree>;
@@ -802,7 +802,7 @@ fn mk_stmts_let(cx: &ExtCtxt, sp: Span) -> Vec<ast::Stmt> {
     // they happen to have a compiler on hand). Over all, the phase distinction
     // just makes quotes "hard to attribute". Possibly this could be fixed
     // by recreating some of the original qq machinery in the tt regime
-    // (pushing fake FileMaps onto the parser to account for original sites
+    // (pushing fake SourceFiles onto the parser to account for original sites
     // of quotes, for example) but at this point it seems not likely to be
     // worth the hassle.
 
diff --git a/src/libsyntax/ext/source_util.rs b/src/libsyntax/ext/source_util.rs
index 9b7e0fe1ae5..19a204cc989 100644
--- a/src/libsyntax/ext/source_util.rs
+++ b/src/libsyntax/ext/source_util.rs
@@ -36,7 +36,7 @@ pub fn expand_line(cx: &mut ExtCtxt, sp: Span, tts: &[tokenstream::TokenTree])
     base::check_zero_tts(cx, sp, tts, "line!");
 
     let topmost = cx.expansion_cause().unwrap_or(sp);
-    let loc = cx.codemap().lookup_char_pos(topmost.lo());
+    let loc = cx.source_map().lookup_char_pos(topmost.lo());
 
     base::MacEager::expr(cx.expr_u32(topmost, loc.line as u32))
 }
@@ -47,7 +47,7 @@ pub fn expand_column(cx: &mut ExtCtxt, sp: Span, tts: &[tokenstream::TokenTree])
     base::check_zero_tts(cx, sp, tts, "column!");
 
     let topmost = cx.expansion_cause().unwrap_or(sp);
-    let loc = cx.codemap().lookup_char_pos(topmost.lo());
+    let loc = cx.source_map().lookup_char_pos(topmost.lo());
 
     base::MacEager::expr(cx.expr_u32(topmost, loc.col.to_usize() as u32 + 1))
 }
@@ -63,14 +63,14 @@ pub fn expand_column_gated(cx: &mut ExtCtxt, sp: Span, tts: &[tokenstream::Token
 }
 
 /// file!(): expands to the current filename */
-/// The filemap (`loc.file`) contains a bunch more information we could spit
+/// The source_file (`loc.file`) contains a bunch more information we could spit
 /// out if we wanted.
 pub fn expand_file(cx: &mut ExtCtxt, sp: Span, tts: &[tokenstream::TokenTree])
                    -> Box<dyn base::MacResult+'static> {
     base::check_zero_tts(cx, sp, tts, "file!");
 
     let topmost = cx.expansion_cause().unwrap_or(sp);
-    let loc = cx.codemap().lookup_char_pos(topmost.lo());
+    let loc = cx.source_map().lookup_char_pos(topmost.lo());
     base::MacEager::expr(cx.expr_str(topmost, Symbol::intern(&loc.file.name.to_string())))
 }
 
@@ -154,7 +154,7 @@ pub fn expand_include_str(cx: &mut ExtCtxt, sp: Span, tts: &[tokenstream::TokenT
 
             // Add this input file to the code map to make it available as
             // dependency information
-            cx.codemap().new_filemap(file.into(), src);
+            cx.source_map().new_source_file(file.into(), src);
 
             base::MacEager::expr(cx.expr_str(sp, interned_src))
         }
@@ -184,7 +184,7 @@ pub fn expand_include_bytes(cx: &mut ExtCtxt, sp: Span, tts: &[tokenstream::Toke
         Ok(..) => {
             // Add this input file to the code map to make it available as
             // dependency information, but don't enter it's contents
-            cx.codemap().new_filemap(file.into(), "".to_string());
+            cx.source_map().new_source_file(file.into(), "".to_string());
 
             base::MacEager::expr(cx.expr_lit(sp, ast::LitKind::ByteStr(Lrc::new(bytes))))
         }
@@ -199,7 +199,7 @@ fn res_rel_file(cx: &mut ExtCtxt, sp: syntax_pos::Span, arg: String) -> PathBuf
     // after macro expansion (that is, they are unhygienic).
     if !arg.is_absolute() {
         let callsite = sp.source_callsite();
-        let mut path = match cx.codemap().span_to_unmapped_path(callsite) {
+        let mut path = match cx.source_map().span_to_unmapped_path(callsite) {
             FileName::Real(path) => path,
             other => panic!("cannot resolve relative path in non-file source `{}`", other),
         };
diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index e8245a553eb..74f573fceba 100644
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -29,7 +29,7 @@ use rustc_data_structures::fx::FxHashMap;
 use rustc_target::spec::abi::Abi;
 use ast::{self, NodeId, PatKind, RangeEnd};
 use attr;
-use codemap::Spanned;
+use source_map::Spanned;
 use edition::{ALL_EDITIONS, Edition};
 use syntax_pos::{Span, DUMMY_SP};
 use errors::{DiagnosticBuilder, Handler};
@@ -1556,7 +1556,7 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
         if !name.as_str().is_ascii() {
             gate_feature_post!(&self,
                                non_ascii_idents,
-                               self.context.parse_sess.codemap().def_span(sp),
+                               self.context.parse_sess.source_map().def_span(sp),
                                "non-ascii idents are not fully supported.");
         }
     }
diff --git a/src/libsyntax/fold.rs b/src/libsyntax/fold.rs
index 3209939d9b1..50a49e2f548 100644
--- a/src/libsyntax/fold.rs
+++ b/src/libsyntax/fold.rs
@@ -21,7 +21,7 @@
 use ast::*;
 use ast;
 use syntax_pos::Span;
-use codemap::{Spanned, respan};
+use source_map::{Spanned, respan};
 use parse::token::{self, Token};
 use ptr::P;
 use OneVector;
diff --git a/src/libsyntax/json.rs b/src/libsyntax/json.rs
index 65de1503966..b0cf29e9f63 100644
--- a/src/libsyntax/json.rs
+++ b/src/libsyntax/json.rs
@@ -19,10 +19,10 @@
 
 // FIXME spec the JSON output properly.
 
-use codemap::{CodeMap, FilePathMapping};
+use source_map::{SourceMap, FilePathMapping};
 use syntax_pos::{self, MacroBacktrace, Span, SpanLabel, MultiSpan};
 use errors::registry::Registry;
-use errors::{DiagnosticBuilder, SubDiagnostic, CodeSuggestion, CodeMapper};
+use errors::{DiagnosticBuilder, SubDiagnostic, CodeSuggestion, SourceMapper};
 use errors::{DiagnosticId, Applicability};
 use errors::emitter::{Emitter, EmitterWriter};
 
@@ -36,14 +36,14 @@ use rustc_serialize::json::{as_json, as_pretty_json};
 pub struct JsonEmitter {
     dst: Box<dyn Write + Send>,
     registry: Option<Registry>,
-    cm: Lrc<dyn CodeMapper + sync::Send + sync::Sync>,
+    cm: Lrc<dyn SourceMapper + sync::Send + sync::Sync>,
     pretty: bool,
     ui_testing: bool,
 }
 
 impl JsonEmitter {
     pub fn stderr(registry: Option<Registry>,
-                  code_map: Lrc<CodeMap>,
+                  code_map: Lrc<SourceMap>,
                   pretty: bool) -> JsonEmitter {
         JsonEmitter {
             dst: Box::new(io::stderr()),
@@ -56,13 +56,13 @@ impl JsonEmitter {
 
     pub fn basic(pretty: bool) -> JsonEmitter {
         let file_path_mapping = FilePathMapping::empty();
-        JsonEmitter::stderr(None, Lrc::new(CodeMap::new(file_path_mapping)),
+        JsonEmitter::stderr(None, Lrc::new(SourceMap::new(file_path_mapping)),
                             pretty)
     }
 
     pub fn new(dst: Box<dyn Write + Send>,
                registry: Option<Registry>,
-               code_map: Lrc<CodeMap>,
+               code_map: Lrc<SourceMap>,
                pretty: bool) -> JsonEmitter {
         JsonEmitter {
             dst,
@@ -340,7 +340,7 @@ impl DiagnosticSpan {
 }
 
 impl DiagnosticSpanLine {
-    fn line_from_filemap(fm: &syntax_pos::FileMap,
+    fn line_from_source_file(fm: &syntax_pos::SourceFile,
                          index: usize,
                          h_start: usize,
                          h_end: usize)
@@ -362,7 +362,7 @@ impl DiagnosticSpanLine {
                  lines.lines
                       .iter()
                       .map(|line| {
-                          DiagnosticSpanLine::line_from_filemap(fm,
+                          DiagnosticSpanLine::line_from_source_file(fm,
                                                                 line.line_index,
                                                                 line.start_col.0 + 1,
                                                                 line.end_col.0 + 1)
diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
index 0a42325d2b6..289f023cefa 100644
--- a/src/libsyntax/lib.rs
+++ b/src/libsyntax/lib.rs
@@ -145,7 +145,7 @@ pub mod syntax {
 
 pub mod ast;
 pub mod attr;
-pub mod codemap;
+pub mod source_map;
 #[macro_use]
 pub mod config;
 pub mod entry;
diff --git a/src/libsyntax/parse/attr.rs b/src/libsyntax/parse/attr.rs
index b0136c3e18b..a240604bfe0 100644
--- a/src/libsyntax/parse/attr.rs
+++ b/src/libsyntax/parse/attr.rs
@@ -10,7 +10,7 @@
 
 use attr;
 use ast;
-use codemap::respan;
+use source_map::respan;
 use parse::{SeqSep, PResult};
 use parse::token::{self, Nonterminal, DelimToken};
 use parse::parser::{Parser, TokenType, PathStyle};
diff --git a/src/libsyntax/parse/lexer/comments.rs b/src/libsyntax/parse/lexer/comments.rs
index 2c53dbdc402..dde0466f43c 100644
--- a/src/libsyntax/parse/lexer/comments.rs
+++ b/src/libsyntax/parse/lexer/comments.rs
@@ -11,7 +11,7 @@
 pub use self::CommentStyle::*;
 
 use ast;
-use codemap::CodeMap;
+use source_map::SourceMap;
 use syntax_pos::{BytePos, CharPos, Pos, FileName};
 use parse::lexer::{is_block_doc_comment, is_pattern_whitespace};
 use parse::lexer::{self, ParseSess, StringReader, TokenAndSpan};
@@ -247,11 +247,11 @@ fn read_block_comment(rdr: &mut StringReader,
     let mut lines: Vec<String> = Vec::new();
 
     // Count the number of chars since the start of the line by rescanning.
-    let mut src_index = rdr.src_index(rdr.filemap.line_begin_pos(rdr.pos));
+    let mut src_index = rdr.src_index(rdr.source_file.line_begin_pos(rdr.pos));
     let end_src_index = rdr.src_index(rdr.pos);
     assert!(src_index <= end_src_index,
         "src_index={}, end_src_index={}, line_begin_pos={}",
-        src_index, end_src_index, rdr.filemap.line_begin_pos(rdr.pos).to_u32());
+        src_index, end_src_index, rdr.source_file.line_begin_pos(rdr.pos).to_u32());
     let mut n = 0;
 
     while src_index < end_src_index {
@@ -371,9 +371,9 @@ pub fn gather_comments_and_literals(sess: &ParseSess, path: FileName, srdr: &mut
 {
     let mut src = String::new();
     srdr.read_to_string(&mut src).unwrap();
-    let cm = CodeMap::new(sess.codemap().path_mapping().clone());
-    let filemap = cm.new_filemap(path, src);
-    let mut rdr = lexer::StringReader::new_raw(sess, filemap, None);
+    let cm = SourceMap::new(sess.source_map().path_mapping().clone());
+    let source_file = cm.new_source_file(path, src);
+    let mut rdr = lexer::StringReader::new_raw(sess, source_file, None);
 
     let mut comments: Vec<Comment> = Vec::new();
     let mut literals: Vec<Literal> = Vec::new();
diff --git a/src/libsyntax/parse/lexer/mod.rs b/src/libsyntax/parse/lexer/mod.rs
index bdf25618f47..448ff9676c9 100644
--- a/src/libsyntax/parse/lexer/mod.rs
+++ b/src/libsyntax/parse/lexer/mod.rs
@@ -10,7 +10,7 @@
 
 use ast::{self, Ident};
 use syntax_pos::{self, BytePos, CharPos, Pos, Span, NO_EXPANSION};
-use codemap::{CodeMap, FilePathMapping};
+use source_map::{SourceMap, FilePathMapping};
 use errors::{Applicability, FatalError, DiagnosticBuilder};
 use parse::{token, ParseSess};
 use str::char_at;
@@ -43,13 +43,13 @@ impl Default for TokenAndSpan {
 
 pub struct StringReader<'a> {
     pub sess: &'a ParseSess,
-    /// The absolute offset within the codemap of the next character to read
+    /// The absolute offset within the source_map of the next character to read
     pub next_pos: BytePos,
-    /// The absolute offset within the codemap of the current character
+    /// The absolute offset within the source_map of the current character
     pub pos: BytePos,
     /// The current character (which has been read from self.pos)
     pub ch: Option<char>,
-    pub filemap: Lrc<syntax_pos::FileMap>,
+    pub source_file: Lrc<syntax_pos::SourceFile>,
     /// Stop reading src at this index.
     pub end_src_index: usize,
     // cached:
@@ -58,7 +58,7 @@ pub struct StringReader<'a> {
     peek_span_src_raw: Span,
     fatal_errs: Vec<DiagnosticBuilder<'a>>,
     // cache a direct reference to the source text, so that we don't have to
-    // retrieve it via `self.filemap.src.as_ref().unwrap()` all the time.
+    // retrieve it via `self.source_file.src.as_ref().unwrap()` all the time.
     src: Lrc<String>,
     /// Stack of open delimiters and their spans. Used for error message.
     token: token::Token,
@@ -180,31 +180,31 @@ impl<'a> StringReader<'a> {
     }
 
     /// For comments.rs, which hackily pokes into next_pos and ch
-    fn new_raw(sess: &'a ParseSess, filemap: Lrc<syntax_pos::FileMap>, override_span: Option<Span>)
-        -> Self
-    {
-        let mut sr = StringReader::new_raw_internal(sess, filemap, override_span);
+    fn new_raw(sess: &'a ParseSess,
+               source_file: Lrc<syntax_pos::SourceFile>,
+               override_span: Option<Span>) -> Self {
+        let mut sr = StringReader::new_raw_internal(sess, source_file, override_span);
         sr.bump();
 
         sr
     }
 
-    fn new_raw_internal(sess: &'a ParseSess, filemap: Lrc<syntax_pos::FileMap>,
+    fn new_raw_internal(sess: &'a ParseSess, source_file: Lrc<syntax_pos::SourceFile>,
         override_span: Option<Span>) -> Self
     {
-        if filemap.src.is_none() {
-            sess.span_diagnostic.bug(&format!("Cannot lex filemap without source: {}",
-                                              filemap.name));
+        if source_file.src.is_none() {
+            sess.span_diagnostic.bug(&format!("Cannot lex source_file without source: {}",
+                                              source_file.name));
         }
 
-        let src = (*filemap.src.as_ref().unwrap()).clone();
+        let src = (*source_file.src.as_ref().unwrap()).clone();
 
         StringReader {
             sess,
-            next_pos: filemap.start_pos,
-            pos: filemap.start_pos,
+            next_pos: source_file.start_pos,
+            pos: source_file.start_pos,
             ch: Some('\n'),
-            filemap,
+            source_file,
             end_src_index: src.len(),
             // dummy values; not read
             peek_tok: token::Eof,
@@ -221,10 +221,10 @@ impl<'a> StringReader<'a> {
         }
     }
 
-    pub fn new(sess: &'a ParseSess, filemap: Lrc<syntax_pos::FileMap>, override_span: Option<Span>)
-        -> Self
-    {
-        let mut sr = StringReader::new_raw(sess, filemap, override_span);
+    pub fn new(sess: &'a ParseSess,
+               source_file: Lrc<syntax_pos::SourceFile>,
+               override_span: Option<Span>) -> Self {
+        let mut sr = StringReader::new_raw(sess, source_file, override_span);
         if sr.advance_token().is_err() {
             sr.emit_fatal_errors();
             FatalError.raise();
@@ -234,8 +234,8 @@ impl<'a> StringReader<'a> {
     }
 
     pub fn retokenize(sess: &'a ParseSess, mut span: Span) -> Self {
-        let begin = sess.codemap().lookup_byte_offset(span.lo());
-        let end = sess.codemap().lookup_byte_offset(span.hi());
+        let begin = sess.source_map().lookup_byte_offset(span.lo());
+        let end = sess.source_map().lookup_byte_offset(span.hi());
 
         // Make the range zero-length if the span is invalid.
         if span.lo() > span.hi() || begin.fm.start_pos != end.fm.start_pos {
@@ -364,8 +364,8 @@ impl<'a> StringReader<'a> {
                 if self.is_eof() {
                     self.peek_tok = token::Eof;
                     let (real, raw) = self.mk_sp_and_raw(
-                        self.filemap.end_pos,
-                        self.filemap.end_pos,
+                        self.source_file.end_pos,
+                        self.source_file.end_pos,
                     );
                     self.peek_span = real;
                     self.peek_span_src_raw = raw;
@@ -384,7 +384,7 @@ impl<'a> StringReader<'a> {
 
     #[inline]
     fn src_index(&self, pos: BytePos) -> usize {
-        (pos - self.filemap.start_pos).to_usize()
+        (pos - self.source_file.start_pos).to_usize()
     }
 
     /// Calls `f` with a string slice of the source text spanning from `start`
@@ -468,7 +468,7 @@ impl<'a> StringReader<'a> {
     }
 
     /// Advance the StringReader by one character. If a newline is
-    /// discovered, add it to the FileMap's list of line start offsets.
+    /// discovered, add it to the SourceFile's list of line start offsets.
     crate fn bump(&mut self) {
         let next_src_index = self.src_index(self.next_pos);
         if next_src_index < self.end_src_index {
@@ -622,8 +622,8 @@ impl<'a> StringReader<'a> {
 
                 // I guess this is the only way to figure out if
                 // we're at the beginning of the file...
-                let cmap = CodeMap::new(FilePathMapping::empty());
-                cmap.files.borrow_mut().file_maps.push(self.filemap.clone());
+                let cmap = SourceMap::new(FilePathMapping::empty());
+                cmap.files.borrow_mut().file_maps.push(self.source_file.clone());
                 let loc = cmap.lookup_char_pos_adj(self.pos);
                 debug!("Skipping a shebang");
                 if loc.line == 1 && loc.col == CharPos(0) {
@@ -1827,7 +1827,7 @@ mod tests {
     use ast::{Ident, CrateConfig};
     use symbol::Symbol;
     use syntax_pos::{BytePos, Span, NO_EXPANSION};
-    use codemap::CodeMap;
+    use source_map::SourceMap;
     use errors;
     use feature_gate::UnstableFeatures;
     use parse::token;
@@ -1837,7 +1837,7 @@ mod tests {
     use diagnostics::plugin::ErrorMap;
     use rustc_data_structures::sync::Lock;
     use with_globals;
-    fn mk_sess(cm: Lrc<CodeMap>) -> ParseSess {
+    fn mk_sess(cm: Lrc<SourceMap>) -> ParseSess {
         let emitter = errors::emitter::EmitterWriter::new(Box::new(io::sink()),
                                                           Some(cm.clone()),
                                                           false,
@@ -1857,18 +1857,18 @@ mod tests {
     }
 
     // open a string reader for the given string
-    fn setup<'a>(cm: &CodeMap,
+    fn setup<'a>(cm: &SourceMap,
                  sess: &'a ParseSess,
                  teststr: String)
                  -> StringReader<'a> {
-        let fm = cm.new_filemap(PathBuf::from("zebra.rs").into(), teststr);
+        let fm = cm.new_source_file(PathBuf::from("zebra.rs").into(), teststr);
         StringReader::new(sess, fm, None)
     }
 
     #[test]
     fn t1() {
         with_globals(|| {
-            let cm = Lrc::new(CodeMap::new(FilePathMapping::empty()));
+            let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
             let sh = mk_sess(cm.clone());
             let mut string_reader = setup(&cm,
                                         &sh,
@@ -1916,7 +1916,7 @@ mod tests {
     #[test]
     fn doublecolonparsing() {
         with_globals(|| {
-            let cm = Lrc::new(CodeMap::new(FilePathMapping::empty()));
+            let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
             let sh = mk_sess(cm.clone());
             check_tokenization(setup(&cm, &sh, "a b".to_string()),
                             vec![mk_ident("a"), token::Whitespace, mk_ident("b")]);
@@ -1926,7 +1926,7 @@ mod tests {
     #[test]
     fn dcparsing_2() {
         with_globals(|| {
-            let cm = Lrc::new(CodeMap::new(FilePathMapping::empty()));
+            let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
             let sh = mk_sess(cm.clone());
             check_tokenization(setup(&cm, &sh, "a::b".to_string()),
                             vec![mk_ident("a"), token::ModSep, mk_ident("b")]);
@@ -1936,7 +1936,7 @@ mod tests {
     #[test]
     fn dcparsing_3() {
         with_globals(|| {
-            let cm = Lrc::new(CodeMap::new(FilePathMapping::empty()));
+            let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
             let sh = mk_sess(cm.clone());
             check_tokenization(setup(&cm, &sh, "a ::b".to_string()),
                             vec![mk_ident("a"), token::Whitespace, token::ModSep, mk_ident("b")]);
@@ -1946,7 +1946,7 @@ mod tests {
     #[test]
     fn dcparsing_4() {
         with_globals(|| {
-            let cm = Lrc::new(CodeMap::new(FilePathMapping::empty()));
+            let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
             let sh = mk_sess(cm.clone());
             check_tokenization(setup(&cm, &sh, "a:: b".to_string()),
                             vec![mk_ident("a"), token::ModSep, token::Whitespace, mk_ident("b")]);
@@ -1956,7 +1956,7 @@ mod tests {
     #[test]
     fn character_a() {
         with_globals(|| {
-            let cm = Lrc::new(CodeMap::new(FilePathMapping::empty()));
+            let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
             let sh = mk_sess(cm.clone());
             assert_eq!(setup(&cm, &sh, "'a'".to_string()).next_token().tok,
                     token::Literal(token::Char(Symbol::intern("a")), None));
@@ -1966,7 +1966,7 @@ mod tests {
     #[test]
     fn character_space() {
         with_globals(|| {
-            let cm = Lrc::new(CodeMap::new(FilePathMapping::empty()));
+            let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
             let sh = mk_sess(cm.clone());
             assert_eq!(setup(&cm, &sh, "' '".to_string()).next_token().tok,
                     token::Literal(token::Char(Symbol::intern(" ")), None));
@@ -1976,7 +1976,7 @@ mod tests {
     #[test]
     fn character_escaped() {
         with_globals(|| {
-            let cm = Lrc::new(CodeMap::new(FilePathMapping::empty()));
+            let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
             let sh = mk_sess(cm.clone());
             assert_eq!(setup(&cm, &sh, "'\\n'".to_string()).next_token().tok,
                     token::Literal(token::Char(Symbol::intern("\\n")), None));
@@ -1986,7 +1986,7 @@ mod tests {
     #[test]
     fn lifetime_name() {
         with_globals(|| {
-            let cm = Lrc::new(CodeMap::new(FilePathMapping::empty()));
+            let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
             let sh = mk_sess(cm.clone());
             assert_eq!(setup(&cm, &sh, "'abc".to_string()).next_token().tok,
                     token::Lifetime(Ident::from_str("'abc")));
@@ -1996,7 +1996,7 @@ mod tests {
     #[test]
     fn raw_string() {
         with_globals(|| {
-            let cm = Lrc::new(CodeMap::new(FilePathMapping::empty()));
+            let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
             let sh = mk_sess(cm.clone());
             assert_eq!(setup(&cm, &sh, "r###\"\"#a\\b\x00c\"\"###".to_string())
                         .next_token()
@@ -2008,7 +2008,7 @@ mod tests {
     #[test]
     fn literal_suffixes() {
         with_globals(|| {
-            let cm = Lrc::new(CodeMap::new(FilePathMapping::empty()));
+            let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
             let sh = mk_sess(cm.clone());
             macro_rules! test {
                 ($input: expr, $tok_type: ident, $tok_contents: expr) => {{
@@ -2054,7 +2054,7 @@ mod tests {
     #[test]
     fn nested_block_comments() {
         with_globals(|| {
-            let cm = Lrc::new(CodeMap::new(FilePathMapping::empty()));
+            let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
             let sh = mk_sess(cm.clone());
             let mut lexer = setup(&cm, &sh, "/* /* */ */'a'".to_string());
             match lexer.next_token().tok {
@@ -2069,7 +2069,7 @@ mod tests {
     #[test]
     fn crlf_comments() {
         with_globals(|| {
-            let cm = Lrc::new(CodeMap::new(FilePathMapping::empty()));
+            let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
             let sh = mk_sess(cm.clone());
             let mut lexer = setup(&cm, &sh, "// test\r\n/// test\r\n".to_string());
             let comment = lexer.next_token();
diff --git a/src/libsyntax/parse/mod.rs b/src/libsyntax/parse/mod.rs
index d029509f0c1..adf01197c6d 100644
--- a/src/libsyntax/parse/mod.rs
+++ b/src/libsyntax/parse/mod.rs
@@ -13,8 +13,8 @@
 use rustc_data_structures::sync::{Lrc, Lock};
 use ast::{self, CrateConfig, NodeId};
 use early_buffered_lints::{BufferedEarlyLint, BufferedEarlyLintId};
-use codemap::{CodeMap, FilePathMapping};
-use syntax_pos::{Span, FileMap, FileName, MultiSpan};
+use source_map::{SourceMap, FilePathMapping};
+use syntax_pos::{Span, SourceFile, FileName, MultiSpan};
 use errors::{Handler, ColorConfig, DiagnosticBuilder};
 use feature_gate::UnstableFeatures;
 use parse::parser::Parser;
@@ -57,13 +57,13 @@ pub struct ParseSess {
     pub non_modrs_mods: Lock<Vec<(ast::Ident, Span)>>,
     /// Used to determine and report recursive mod inclusions
     included_mod_stack: Lock<Vec<PathBuf>>,
-    code_map: Lrc<CodeMap>,
+    code_map: Lrc<SourceMap>,
     pub buffered_lints: Lock<Vec<BufferedEarlyLint>>,
 }
 
 impl ParseSess {
     pub fn new(file_path_mapping: FilePathMapping) -> Self {
-        let cm = Lrc::new(CodeMap::new(file_path_mapping));
+        let cm = Lrc::new(SourceMap::new(file_path_mapping));
         let handler = Handler::with_tty_emitter(ColorConfig::Auto,
                                                 true,
                                                 false,
@@ -71,7 +71,7 @@ impl ParseSess {
         ParseSess::with_span_handler(handler, cm)
     }
 
-    pub fn with_span_handler(handler: Handler, code_map: Lrc<CodeMap>) -> ParseSess {
+    pub fn with_span_handler(handler: Handler, code_map: Lrc<SourceMap>) -> ParseSess {
         ParseSess {
             span_diagnostic: handler,
             unstable_features: UnstableFeatures::from_environment(),
@@ -86,7 +86,7 @@ impl ParseSess {
         }
     }
 
-    pub fn codemap(&self) -> &CodeMap {
+    pub fn source_map(&self) -> &SourceMap {
         &self.code_map
     }
 
@@ -171,13 +171,13 @@ crate fn parse_stmt_from_source_str(name: FileName, source: String, sess: &Parse
 pub fn parse_stream_from_source_str(name: FileName, source: String, sess: &ParseSess,
                                     override_span: Option<Span>)
                                     -> TokenStream {
-    filemap_to_stream(sess, sess.codemap().new_filemap(name, source), override_span)
+    source_file_to_stream(sess, sess.source_map().new_source_file(name, source), override_span)
 }
 
 // Create a new parser from a source string
 pub fn new_parser_from_source_str(sess: &ParseSess, name: FileName, source: String)
                                       -> Parser {
-    let mut parser = filemap_to_parser(sess, sess.codemap().new_filemap(name, source));
+    let mut parser = source_file_to_parser(sess, sess.source_map().new_source_file(name, source));
     parser.recurse_into_file_modules = false;
     parser
 }
@@ -185,27 +185,27 @@ pub fn new_parser_from_source_str(sess: &ParseSess, name: FileName, source: Stri
 /// Create a new parser, handling errors as appropriate
 /// if the file doesn't exist
 pub fn new_parser_from_file<'a>(sess: &'a ParseSess, path: &Path) -> Parser<'a> {
-    filemap_to_parser(sess, file_to_filemap(sess, path, None))
+    source_file_to_parser(sess, file_to_source_file(sess, path, None))
 }
 
 /// Given a session, a crate config, a path, and a span, add
-/// the file at the given path to the codemap, and return a parser.
+/// the file at the given path to the source_map, and return a parser.
 /// On an error, use the given span as the source of the problem.
 crate fn new_sub_parser_from_file<'a>(sess: &'a ParseSess,
                                     path: &Path,
                                     directory_ownership: DirectoryOwnership,
                                     module_name: Option<String>,
                                     sp: Span) -> Parser<'a> {
-    let mut p = filemap_to_parser(sess, file_to_filemap(sess, path, Some(sp)));
+    let mut p = source_file_to_parser(sess, file_to_source_file(sess, path, Some(sp)));
     p.directory.ownership = directory_ownership;
     p.root_module_name = module_name;
     p
 }
 
-/// Given a filemap and config, return a parser
-fn filemap_to_parser(sess: & ParseSess, filemap: Lrc<FileMap>) -> Parser {
-    let end_pos = filemap.end_pos;
-    let mut parser = stream_to_parser(sess, filemap_to_stream(sess, filemap, None));
+/// Given a source_file and config, return a parser
+fn source_file_to_parser(sess: & ParseSess, source_file: Lrc<SourceFile>) -> Parser {
+    let end_pos = source_file.end_pos;
+    let mut parser = stream_to_parser(sess, source_file_to_stream(sess, source_file, None));
 
     if parser.token == token::Eof && parser.span.is_dummy() {
         parser.span = Span::new(end_pos, end_pos, parser.span.ctxt());
@@ -224,11 +224,11 @@ pub fn new_parser_from_tts(sess: &ParseSess, tts: Vec<TokenTree>) -> Parser {
 // base abstractions
 
 /// Given a session and a path and an optional span (for error reporting),
-/// add the path to the session's codemap and return the new filemap.
-fn file_to_filemap(sess: &ParseSess, path: &Path, spanopt: Option<Span>)
-                   -> Lrc<FileMap> {
-    match sess.codemap().load_file(path) {
-        Ok(filemap) => filemap,
+/// add the path to the session's source_map and return the new source_file.
+fn file_to_source_file(sess: &ParseSess, path: &Path, spanopt: Option<Span>)
+                   -> Lrc<SourceFile> {
+    match sess.source_map().load_file(path) {
+        Ok(source_file) => source_file,
         Err(e) => {
             let msg = format!("couldn't read {:?}: {}", path.display(), e);
             match spanopt {
@@ -239,10 +239,11 @@ fn file_to_filemap(sess: &ParseSess, path: &Path, spanopt: Option<Span>)
     }
 }
 
-/// Given a filemap, produce a sequence of token-trees
-pub fn filemap_to_stream(sess: &ParseSess, filemap: Lrc<FileMap>, override_span: Option<Span>)
-                         -> TokenStream {
-    let mut srdr = lexer::StringReader::new(sess, filemap, override_span);
+/// Given a source_file, produce a sequence of token-trees
+pub fn source_file_to_stream(sess: &ParseSess,
+                             source_file: Lrc<SourceFile>,
+                             override_span: Option<Span>) -> TokenStream {
+    let mut srdr = lexer::StringReader::new(sess, source_file, override_span);
     srdr.real_token();
     panictry!(srdr.parse_all_token_trees())
 }
@@ -969,7 +970,7 @@ mod tests {
 
             let span = tts.iter().rev().next().unwrap().span();
 
-            match sess.codemap().span_to_snippet(span) {
+            match sess.source_map().span_to_snippet(span) {
                 Ok(s) => assert_eq!(&s[..], "{ body }"),
                 Err(_) => panic!("could not get snippet"),
             }
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index 345464c6664..b1e2e69863d 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -42,7 +42,7 @@ use ast::{UseTree, UseTreeKind};
 use ast::{BinOpKind, UnOp};
 use ast::{RangeEnd, RangeSyntax};
 use {ast, attr};
-use codemap::{self, CodeMap, Spanned, respan};
+use source_map::{self, SourceMap, Spanned, respan};
 use syntax_pos::{self, Span, MultiSpan, BytePos, FileName, edition::Edition};
 use errors::{self, Applicability, DiagnosticBuilder, DiagnosticId};
 use parse::{self, SeqSep, classify, token};
@@ -577,7 +577,7 @@ impl<'a> Parser<'a> {
         if let Some(directory) = directory {
             parser.directory = directory;
         } else if !parser.span.is_dummy() {
-            if let FileName::Real(mut path) = sess.codemap().span_to_unmapped_path(parser.span) {
+            if let FileName::Real(mut path) = sess.source_map().span_to_unmapped_path(parser.span) {
                 path.pop();
                 parser.directory.path = Cow::from(path);
             }
@@ -652,10 +652,10 @@ impl<'a> Parser<'a> {
                     // EOF, don't want to point at the following char, but rather the last token
                     self.prev_span
                 } else {
-                    self.sess.codemap().next_point(self.prev_span)
+                    self.sess.source_map().next_point(self.prev_span)
                 };
                 let label_exp = format!("expected `{}`", token_str);
-                let cm = self.sess.codemap();
+                let cm = self.sess.source_map();
                 match (cm.lookup_line(self.span.lo()), cm.lookup_line(sp.lo())) {
                     (Ok(ref a), Ok(ref b)) if a.line == b.line => {
                         // When the spans are in the same line, it means that the only content
@@ -720,14 +720,14 @@ impl<'a> Parser<'a> {
                     expect.clone()
                 };
                 (format!("expected one of {}, found `{}`", expect, actual),
-                 (self.sess.codemap().next_point(self.prev_span),
+                 (self.sess.source_map().next_point(self.prev_span),
                   format!("expected one of {} here", short_expect)))
             } else if expected.is_empty() {
                 (format!("unexpected token: `{}`", actual),
                  (self.prev_span, "unexpected token after this".to_string()))
             } else {
                 (format!("expected {}, found `{}`", expect, actual),
-                 (self.sess.codemap().next_point(self.prev_span),
+                 (self.sess.source_map().next_point(self.prev_span),
                   format!("expected {} here", expect)))
             };
             let mut err = self.fatal(&msg_exp);
@@ -738,7 +738,7 @@ impl<'a> Parser<'a> {
                 label_sp
             };
 
-            let cm = self.sess.codemap();
+            let cm = self.sess.source_map();
             match (cm.lookup_line(self.span.lo()), cm.lookup_line(sp.lo())) {
                 (Ok(ref a), Ok(ref b)) if a.line == b.line => {
                     // When the spans are in the same line, it means that the only content between
@@ -1879,7 +1879,7 @@ impl<'a> Parser<'a> {
             let lit = self.parse_lit_token()?;
             lit
         };
-        Ok(codemap::Spanned { node: lit, span: lo.to(self.prev_span) })
+        Ok(source_map::Spanned { node: lit, span: lo.to(self.prev_span) })
     }
 
     /// matches '-' lit | lit (cf. ast_validation::AstValidator::check_expr_within_pat)
@@ -2185,7 +2185,7 @@ impl<'a> Parser<'a> {
     pub fn mk_mac_expr(&mut self, span: Span, m: Mac_, attrs: ThinVec<Attribute>) -> P<Expr> {
         P(Expr {
             id: ast::DUMMY_NODE_ID,
-            node: ExprKind::Mac(codemap::Spanned {node: m, span: span}),
+            node: ExprKind::Mac(source_map::Spanned {node: m, span: span}),
             span,
             attrs,
         })
@@ -2902,7 +2902,7 @@ impl<'a> Parser<'a> {
                                                   self.this_token_descr()));
                     // span the `not` plus trailing whitespace to avoid
                     // trailing whitespace after the `!` in our suggestion
-                    let to_replace = self.sess.codemap()
+                    let to_replace = self.sess.source_map()
                         .span_until_non_whitespace(lo.to(self.span));
                     err.span_suggestion_short_with_applicability(
                         to_replace,
@@ -3000,7 +3000,7 @@ impl<'a> Parser<'a> {
                     Err(mut err) => {
                         err.span_label(self.span,
                                        "expecting a type here because of type ascription");
-                        let cm = self.sess.codemap();
+                        let cm = self.sess.source_map();
                         let cur_pos = cm.lookup_char_pos(self.span.lo());
                         let op_pos = cm.lookup_char_pos(cur_op_span.hi());
                         if cur_pos.line != op_pos.line {
@@ -3074,7 +3074,7 @@ impl<'a> Parser<'a> {
                 AssocOp::Equal | AssocOp::Less | AssocOp::LessEqual | AssocOp::NotEqual |
                 AssocOp::Greater | AssocOp::GreaterEqual => {
                     let ast_op = op.to_ast_binop().unwrap();
-                    let binary = self.mk_binary(codemap::respan(cur_op_span, ast_op), lhs, rhs);
+                    let binary = self.mk_binary(source_map::respan(cur_op_span, ast_op), lhs, rhs);
                     self.mk_expr(span, binary, ThinVec::new())
                 }
                 AssocOp::Assign =>
@@ -3094,7 +3094,7 @@ impl<'a> Parser<'a> {
                         token::Shl =>     BinOpKind::Shl,
                         token::Shr =>     BinOpKind::Shr,
                     };
-                    let aopexpr = self.mk_assign_op(codemap::respan(cur_op_span, aop), lhs, rhs);
+                    let aopexpr = self.mk_assign_op(source_map::respan(cur_op_span, aop), lhs, rhs);
                     self.mk_expr(span, aopexpr, ThinVec::new())
                 }
                 AssocOp::As | AssocOp::Colon | AssocOp::DotDot | AssocOp::DotDotEq => {
@@ -3161,7 +3161,7 @@ impl<'a> Parser<'a> {
                             id: ast::DUMMY_NODE_ID
                         }));
 
-                        let expr_str = self.sess.codemap().span_to_snippet(expr.span)
+                        let expr_str = self.sess.source_map().span_to_snippet(expr.span)
                                                 .unwrap_or(pprust::expr_to_string(&expr));
                         err.span_suggestion_with_applicability(
                             expr.span,
@@ -3277,7 +3277,7 @@ impl<'a> Parser<'a> {
         // return. This won't catch blocks with an explicit `return`, but that would be caught by
         // the dead code lint.
         if self.eat_keyword(keywords::Else) || !cond.returns() {
-            let sp = self.sess.codemap().next_point(lo);
+            let sp = self.sess.source_map().next_point(lo);
             let mut err = self.diagnostic()
                 .struct_span_err(sp, "missing condition for `if` statemement");
             err.span_label(sp, "expected if condition here");
@@ -3527,7 +3527,7 @@ impl<'a> Parser<'a> {
             && self.token != token::CloseDelim(token::Brace);
 
         if require_comma {
-            let cm = self.sess.codemap();
+            let cm = self.sess.source_map();
             self.expect_one_of(&[token::Comma], &[token::CloseDelim(token::Brace)])
                 .map_err(|mut err| {
                     match (cm.span_to_lines(expr.span), cm.span_to_lines(arm_start_span)) {
@@ -3736,7 +3736,7 @@ impl<'a> Parser<'a> {
         &mut self,
         lo: Span,
         attrs: Vec<Attribute>
-    ) -> PResult<'a, codemap::Spanned<ast::FieldPat>> {
+    ) -> PResult<'a, source_map::Spanned<ast::FieldPat>> {
         // Check if a colon exists one ahead. This means we're parsing a fieldname.
         let hi;
         let (subpat, fieldname, is_shorthand) = if self.look_ahead(1, |t| t == &token::Colon) {
@@ -3779,7 +3779,7 @@ impl<'a> Parser<'a> {
             (subpat, fieldname, true)
         };
 
-        Ok(codemap::Spanned {
+        Ok(source_map::Spanned {
             span: lo.to(hi),
             node: ast::FieldPat {
                 ident: fieldname,
@@ -3791,7 +3791,7 @@ impl<'a> Parser<'a> {
     }
 
     /// Parse the fields of a struct-like pattern
-    fn parse_pat_fields(&mut self) -> PResult<'a, (Vec<codemap::Spanned<ast::FieldPat>>, bool)> {
+    fn parse_pat_fields(&mut self) -> PResult<'a, (Vec<source_map::Spanned<ast::FieldPat>>, bool)> {
         let mut fields = Vec::new();
         let mut etc = false;
         let mut ate_comma = true;
@@ -3837,7 +3837,7 @@ impl<'a> Parser<'a> {
                 err.span_label(self.span, "expected `}`");
                 let mut comma_sp = None;
                 if self.token == token::Comma { // Issue #49257
-                    etc_sp = etc_sp.to(self.sess.codemap().span_until_non_whitespace(self.span));
+                    etc_sp = etc_sp.to(self.sess.source_map().span_until_non_whitespace(self.span));
                     err.span_label(etc_sp,
                                    "`..` must be at the end and cannot have a trailing comma");
                     comma_sp = Some(self.span);
@@ -3955,7 +3955,7 @@ impl<'a> Parser<'a> {
             let seq_span = pat.span.to(self.prev_span);
             let mut err = self.struct_span_err(comma_span,
                                                "unexpected `,` in pattern");
-            if let Ok(seq_snippet) = self.sess.codemap().span_to_snippet(seq_span) {
+            if let Ok(seq_snippet) = self.sess.source_map().span_to_snippet(seq_span) {
                 err.span_suggestion_with_applicability(
                     seq_span,
                     "try adding parentheses",
@@ -4220,7 +4220,7 @@ impl<'a> Parser<'a> {
                     let parser_snapshot_after_type = self.clone();
                     mem::replace(self, parser_snapshot_before_type);
 
-                    let snippet = self.sess.codemap().span_to_snippet(pat.span).unwrap();
+                    let snippet = self.sess.source_map().span_to_snippet(pat.span).unwrap();
                     err.span_label(pat.span, format!("while parsing the type for `{}`", snippet));
                     (Some((parser_snapshot_after_type, colon_sp, err)), None)
                 }
@@ -4518,7 +4518,7 @@ impl<'a> Parser<'a> {
             }
         } else if let Some(macro_def) = self.eat_macro_def(
             &attrs,
-            &codemap::respan(lo, VisibilityKind::Inherited),
+            &source_map::respan(lo, VisibilityKind::Inherited),
             lo,
         )? {
             Stmt {
@@ -5398,7 +5398,7 @@ impl<'a> Parser<'a> {
             _ => return Ok(None),
         };
 
-        let eself = codemap::respan(eself_lo.to(eself_hi), eself);
+        let eself = source_map::respan(eself_lo.to(eself_hi), eself);
         Ok(Some(Arg::from_self(eself, eself_ident)))
     }
 
@@ -6039,7 +6039,7 @@ impl<'a> Parser<'a> {
                     err.emit();
                 } else {
                     if seen_comma == false {
-                        let sp = self.sess.codemap().next_point(previous_span);
+                        let sp = self.sess.source_map().next_point(previous_span);
                         err.span_suggestion_with_applicability(
                             sp,
                             "missing comma here",
@@ -6051,7 +6051,7 @@ impl<'a> Parser<'a> {
                 }
             }
             _ => {
-                let sp = self.sess.codemap().next_point(self.prev_span);
+                let sp = self.sess.source_map().next_point(self.prev_span);
                 let mut err = self.struct_span_err(sp, &format!("expected `,`, or `}}`, found `{}`",
                                                                 self.this_token_to_string()));
                 if self.token.is_ident() {
@@ -6322,7 +6322,7 @@ impl<'a> Parser<'a> {
         id: ast::Ident,
         relative: Option<ast::Ident>,
         dir_path: &Path,
-        codemap: &CodeMap) -> ModulePath
+        source_map: &SourceMap) -> ModulePath
     {
         // If we're in a foo.rs file instead of a mod.rs file,
         // we need to look for submodules in
@@ -6342,8 +6342,8 @@ impl<'a> Parser<'a> {
                                          relative_prefix, mod_name, path::MAIN_SEPARATOR);
         let default_path = dir_path.join(&default_path_str);
         let secondary_path = dir_path.join(&secondary_path_str);
-        let default_exists = codemap.file_exists(&default_path);
-        let secondary_exists = codemap.file_exists(&secondary_path);
+        let default_exists = source_map.file_exists(&default_path);
+        let secondary_exists = source_map.file_exists(&secondary_path);
 
         let result = match (default_exists, secondary_exists) {
             (true, false) => Ok(ModulePathSuccess {
@@ -6418,7 +6418,7 @@ impl<'a> Parser<'a> {
             DirectoryOwnership::UnownedViaMod(_) => None,
         };
         let paths = Parser::default_submod_path(
-                        id, relative, &self.directory.path, self.sess.codemap());
+                        id, relative, &self.directory.path, self.sess.source_map());
 
         match self.directory.ownership {
             DirectoryOwnership::Owned { .. } => {
@@ -6445,7 +6445,7 @@ impl<'a> Parser<'a> {
                 let mut err = self.diagnostic().struct_span_err(id_sp,
                     "cannot declare a new module at this location");
                 if !id_sp.is_dummy() {
-                    let src_path = self.sess.codemap().span_to_filename(id_sp);
+                    let src_path = self.sess.source_map().span_to_filename(id_sp);
                     if let FileName::Real(src_path) = src_path {
                         if let Some(stem) = src_path.file_stem() {
                             let mut dest_path = src_path.clone();
@@ -7207,7 +7207,7 @@ impl<'a> Parser<'a> {
                         sp, &suggestion, format!(" {} ", kw), Applicability::MachineApplicable
                     );
                 } else {
-                    if let Ok(snippet) = self.sess.codemap().span_to_snippet(ident_sp) {
+                    if let Ok(snippet) = self.sess.source_map().span_to_snippet(ident_sp) {
                         err.span_suggestion_with_applicability(
                             full_sp,
                             "if you meant to call a macro, try",
diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index 54ce06f61ef..3065e795ed8 100644
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -16,7 +16,7 @@ use ast::{SelfKind, GenericBound, TraitBoundModifier};
 use ast::{Attribute, MacDelimiter, GenericArg};
 use util::parser::{self, AssocOp, Fixity};
 use attr;
-use codemap::{self, CodeMap, Spanned};
+use source_map::{self, SourceMap, Spanned};
 use syntax_pos::{self, BytePos};
 use syntax_pos::hygiene::{Mark, SyntaxContext};
 use parse::token::{self, BinOpToken, Token};
@@ -57,7 +57,7 @@ impl PpAnn for NoAnn {}
 
 pub struct State<'a> {
     pub s: pp::Printer<'a>,
-    cm: Option<&'a CodeMap>,
+    cm: Option<&'a SourceMap>,
     comments: Option<Vec<comments::Comment> >,
     literals: Peekable<vec::IntoIter<comments::Literal>>,
     cur_cmnt: usize,
@@ -84,7 +84,7 @@ pub const DEFAULT_COLUMNS: usize = 78;
 /// Requires you to pass an input filename and reader so that
 /// it can scan the input text for comments and literals to
 /// copy forward.
-pub fn print_crate<'a>(cm: &'a CodeMap,
+pub fn print_crate<'a>(cm: &'a SourceMap,
                        sess: &ParseSess,
                        krate: &ast::Crate,
                        filename: FileName,
@@ -118,7 +118,7 @@ pub fn print_crate<'a>(cm: &'a CodeMap,
 }
 
 impl<'a> State<'a> {
-    pub fn new_from_input(cm: &'a CodeMap,
+    pub fn new_from_input(cm: &'a SourceMap,
                           sess: &ParseSess,
                           filename: FileName,
                           input: &mut dyn Read,
@@ -138,7 +138,7 @@ impl<'a> State<'a> {
             if is_expanded { None } else { Some(lits) })
     }
 
-    pub fn new(cm: &'a CodeMap,
+    pub fn new(cm: &'a SourceMap,
                out: Box<dyn Write+'a>,
                ann: &'a dyn PpAnn,
                comments: Option<Vec<comments::Comment>>,
@@ -380,7 +380,7 @@ pub fn fun_to_string(decl: &ast::FnDecl,
     to_string(|s| {
         s.head("")?;
         s.print_fn(decl, header, Some(name),
-                   generics, &codemap::dummy_spanned(ast::VisibilityKind::Inherited))?;
+                   generics, &source_map::dummy_spanned(ast::VisibilityKind::Inherited))?;
         s.end()?; // Close the head box
         s.end() // Close the outer box
     })
@@ -1606,7 +1606,7 @@ impl<'a> State<'a> {
                     ti.ident,
                     ty,
                     default.as_ref().map(|expr| &**expr),
-                    &codemap::respan(ti.span.shrink_to_lo(), ast::VisibilityKind::Inherited),
+                    &source_map::respan(ti.span.shrink_to_lo(), ast::VisibilityKind::Inherited),
                 )?;
             }
             ast::TraitItemKind::Method(ref sig, ref body) => {
@@ -1617,7 +1617,7 @@ impl<'a> State<'a> {
                     ti.ident,
                     &ti.generics,
                     sig,
-                    &codemap::respan(ti.span.shrink_to_lo(), ast::VisibilityKind::Inherited),
+                    &source_map::respan(ti.span.shrink_to_lo(), ast::VisibilityKind::Inherited),
                 )?;
                 if let Some(ref body) = *body {
                     self.nbsp()?;
@@ -3085,7 +3085,7 @@ impl<'a> State<'a> {
                       ast::FnHeader { unsafety, abi, ..ast::FnHeader::default() },
                       name,
                       &generics,
-                      &codemap::dummy_spanned(ast::VisibilityKind::Inherited))?;
+                      &source_map::dummy_spanned(ast::VisibilityKind::Inherited))?;
         self.end()
     }
 
@@ -3185,7 +3185,7 @@ mod tests {
     use super::*;
 
     use ast;
-    use codemap;
+    use source_map;
     use syntax_pos;
     use with_globals;
 
@@ -3205,7 +3205,7 @@ mod tests {
                     &decl,
                     ast::FnHeader {
                         unsafety: ast::Unsafety::Normal,
-                        constness: codemap::dummy_spanned(ast::Constness::NotConst),
+                        constness: source_map::dummy_spanned(ast::Constness::NotConst),
                         asyncness: ast::IsAsync::NotAsync,
                         abi: Abi::Rust,
                     },
@@ -3222,7 +3222,7 @@ mod tests {
         with_globals(|| {
             let ident = ast::Ident::from_str("principal_skinner");
 
-            let var = codemap::respan(syntax_pos::DUMMY_SP, ast::Variant_ {
+            let var = source_map::respan(syntax_pos::DUMMY_SP, ast::Variant_ {
                 ident,
                 attrs: Vec::new(),
                 // making this up as I go.... ?
diff --git a/src/libsyntax/codemap.rs b/src/libsyntax/source_map.rs
index 0a9991d33b1..c65931a8577 100644
--- a/src/libsyntax/codemap.rs
+++ b/src/libsyntax/source_map.rs
@@ -8,13 +8,13 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! The CodeMap tracks all the source code used within a single crate, mapping
+//! The SourceMap tracks all the source code used within a single crate, mapping
 //! from integer byte positions to the original source code location. Each bit
 //! of source parsed during crate parsing (typically files, in-memory strings,
 //! or various bits of macro expansion) cover a continuous range of bytes in the
-//! CodeMap and are represented by FileMaps. Byte positions are stored in
+//! SourceMap and are represented by SourceFiles. Byte positions are stored in
 //! `spans` and used pervasively in the compiler. They are absolute positions
-//! within the CodeMap, which upon request can be converted to line and column
+//! within the SourceMap, which upon request can be converted to line and column
 //! information, source code snippets, etc.
 
 
@@ -32,7 +32,7 @@ use std::path::{Path, PathBuf};
 use std::env;
 use std::fs;
 use std::io::{self, Read};
-use errors::CodeMapper;
+use errors::SourceMapper;
 
 /// Return the span itself if it doesn't come from a macro expansion,
 /// otherwise return the call site span up to the `enclosing_sp` by
@@ -62,7 +62,7 @@ pub fn dummy_spanned<T>(t: T) -> Spanned<T> {
 }
 
 // _____________________________________________________________________________
-// FileMap, MultiByteChar, FileName, FileLines
+// SourceFile, MultiByteChar, FileName, FileLines
 //
 
 /// An abstraction over the fs operations used by the Parser.
@@ -102,50 +102,50 @@ impl FileLoader for RealFileLoader {
     }
 }
 
-// This is a FileMap identifier that is used to correlate FileMaps between
+// This is a SourceFile identifier that is used to correlate SourceFiles between
 // subsequent compilation sessions (which is something we need to do during
 // incremental compilation).
 #[derive(Copy, Clone, PartialEq, Eq, Hash, RustcEncodable, RustcDecodable, Debug)]
 pub struct StableFilemapId(u128);
 
 impl StableFilemapId {
-    pub fn new(filemap: &FileMap) -> StableFilemapId {
+    pub fn new(source_file: &SourceFile) -> StableFilemapId {
         let mut hasher = StableHasher::new();
 
-        filemap.name.hash(&mut hasher);
-        filemap.name_was_remapped.hash(&mut hasher);
-        filemap.unmapped_path.hash(&mut hasher);
+        source_file.name.hash(&mut hasher);
+        source_file.name_was_remapped.hash(&mut hasher);
+        source_file.unmapped_path.hash(&mut hasher);
 
         StableFilemapId(hasher.finish())
     }
 }
 
 // _____________________________________________________________________________
-// CodeMap
+// SourceMap
 //
 
-pub(super) struct CodeMapFiles {
-    pub(super) file_maps: Vec<Lrc<FileMap>>,
-    stable_id_to_filemap: FxHashMap<StableFilemapId, Lrc<FileMap>>
+pub(super) struct SourceMapFiles {
+    pub(super) file_maps: Vec<Lrc<SourceFile>>,
+    stable_id_to_source_file: FxHashMap<StableFilemapId, Lrc<SourceFile>>
 }
 
-pub struct CodeMap {
-    pub(super) files: Lock<CodeMapFiles>,
+pub struct SourceMap {
+    pub(super) files: Lock<SourceMapFiles>,
     file_loader: Box<dyn FileLoader + Sync + Send>,
     // This is used to apply the file path remapping as specified via
-    // --remap-path-prefix to all FileMaps allocated within this CodeMap.
+    // --remap-path-prefix to all SourceFiles allocated within this SourceMap.
     path_mapping: FilePathMapping,
     /// In case we are in a doctest, replace all file names with the PathBuf,
     /// and add the given offsets to the line info
     doctest_offset: Option<(FileName, isize)>,
 }
 
-impl CodeMap {
-    pub fn new(path_mapping: FilePathMapping) -> CodeMap {
-        CodeMap {
-            files: Lock::new(CodeMapFiles {
+impl SourceMap {
+    pub fn new(path_mapping: FilePathMapping) -> SourceMap {
+        SourceMap {
+            files: Lock::new(SourceMapFiles {
                 file_maps: Vec::new(),
-                stable_id_to_filemap: FxHashMap(),
+                stable_id_to_source_file: FxHashMap(),
             }),
             file_loader: Box::new(RealFileLoader),
             path_mapping,
@@ -154,21 +154,21 @@ impl CodeMap {
     }
 
     pub fn new_doctest(path_mapping: FilePathMapping,
-                       file: FileName, line: isize) -> CodeMap {
-        CodeMap {
+                       file: FileName, line: isize) -> SourceMap {
+        SourceMap {
             doctest_offset: Some((file, line)),
-            ..CodeMap::new(path_mapping)
+            ..SourceMap::new(path_mapping)
         }
 
     }
 
     pub fn with_file_loader(file_loader: Box<dyn FileLoader + Sync + Send>,
                             path_mapping: FilePathMapping)
-                            -> CodeMap {
-        CodeMap {
-            files: Lock::new(CodeMapFiles {
+                            -> SourceMap {
+        SourceMap {
+            files: Lock::new(SourceMapFiles {
                 file_maps: Vec::new(),
-                stable_id_to_filemap: FxHashMap(),
+                stable_id_to_source_file: FxHashMap(),
             }),
             file_loader: file_loader,
             path_mapping,
@@ -184,36 +184,36 @@ impl CodeMap {
         self.file_loader.file_exists(path)
     }
 
-    pub fn load_file(&self, path: &Path) -> io::Result<Lrc<FileMap>> {
+    pub fn load_file(&self, path: &Path) -> io::Result<Lrc<SourceFile>> {
         let src = self.file_loader.read_file(path)?;
         let filename = if let Some((ref name, _)) = self.doctest_offset {
             name.clone()
         } else {
             path.to_owned().into()
         };
-        Ok(self.new_filemap(filename, src))
+        Ok(self.new_source_file(filename, src))
     }
 
-    pub fn files(&self) -> LockGuard<Vec<Lrc<FileMap>>> {
+    pub fn files(&self) -> LockGuard<Vec<Lrc<SourceFile>>> {
         LockGuard::map(self.files.borrow(), |files| &mut files.file_maps)
     }
 
-    pub fn filemap_by_stable_id(&self, stable_id: StableFilemapId) -> Option<Lrc<FileMap>> {
-        self.files.borrow().stable_id_to_filemap.get(&stable_id).map(|fm| fm.clone())
+    pub fn source_file_by_stable_id(&self, stable_id: StableFilemapId) -> Option<Lrc<SourceFile>> {
+        self.files.borrow().stable_id_to_source_file.get(&stable_id).map(|fm| fm.clone())
     }
 
     fn next_start_pos(&self) -> usize {
         match self.files.borrow().file_maps.last() {
             None => 0,
             // Add one so there is some space between files. This lets us distinguish
-            // positions in the codemap, even in the presence of zero-length files.
+            // positions in the source_map, even in the presence of zero-length files.
             Some(last) => last.end_pos.to_usize() + 1,
         }
     }
 
-    /// Creates a new filemap.
-    /// This does not ensure that only one FileMap exists per file name.
-    pub fn new_filemap(&self, filename: FileName, src: String) -> Lrc<FileMap> {
+    /// Creates a new source_file.
+    /// This does not ensure that only one SourceFile exists per file name.
+    pub fn new_source_file(&self, filename: FileName, src: String) -> Lrc<SourceFile> {
         let start_pos = self.next_start_pos();
 
         // The path is used to determine the directory for loading submodules and
@@ -230,7 +230,7 @@ impl CodeMap {
             },
             other => (other, false),
         };
-        let filemap = Lrc::new(FileMap::new(
+        let source_file = Lrc::new(SourceFile::new(
             filename,
             was_remapped,
             unmapped_path,
@@ -240,17 +240,18 @@ impl CodeMap {
 
         let mut files = self.files.borrow_mut();
 
-        files.file_maps.push(filemap.clone());
-        files.stable_id_to_filemap.insert(StableFilemapId::new(&filemap), filemap.clone());
+        files.file_maps.push(source_file.clone());
+        files.stable_id_to_source_file.insert(StableFilemapId::new(&source_file),
+                                              source_file.clone());
 
-        filemap
+        source_file
     }
 
-    /// Allocates a new FileMap representing a source file from an external
-    /// crate. The source code of such an "imported filemap" is not available,
+    /// Allocates a new SourceFile representing a source file from an external
+    /// crate. The source code of such an "imported source_file" is not available,
     /// but we still know enough to generate accurate debuginfo location
     /// information for things inlined from other crates.
-    pub fn new_imported_filemap(&self,
+    pub fn new_imported_source_file(&self,
                                 filename: FileName,
                                 name_was_remapped: bool,
                                 crate_of_origin: u32,
@@ -260,7 +261,7 @@ impl CodeMap {
                                 mut file_local_lines: Vec<BytePos>,
                                 mut file_local_multibyte_chars: Vec<MultiByteChar>,
                                 mut file_local_non_narrow_chars: Vec<NonNarrowChar>)
-                                -> Lrc<FileMap> {
+                                -> Lrc<SourceFile> {
         let start_pos = self.next_start_pos();
 
         let end_pos = Pos::from_usize(start_pos + source_len);
@@ -278,7 +279,7 @@ impl CodeMap {
             *swc = *swc + start_pos;
         }
 
-        let filemap = Lrc::new(FileMap {
+        let source_file = Lrc::new(SourceFile {
             name: filename,
             name_was_remapped,
             unmapped_path: None,
@@ -296,10 +297,11 @@ impl CodeMap {
 
         let mut files = self.files.borrow_mut();
 
-        files.file_maps.push(filemap.clone());
-        files.stable_id_to_filemap.insert(StableFilemapId::new(&filemap), filemap.clone());
+        files.file_maps.push(source_file.clone());
+        files.stable_id_to_source_file.insert(StableFilemapId::new(&source_file),
+                                              source_file.clone());
 
-        filemap
+        source_file
     }
 
     pub fn mk_substr_filename(&self, sp: Span) -> String {
@@ -326,7 +328,7 @@ impl CodeMap {
     pub fn lookup_char_pos(&self, pos: BytePos) -> Loc {
         let chpos = self.bytepos_to_file_charpos(pos);
         match self.lookup_line(pos) {
-            Ok(FileMapAndLine { fm: f, line: a }) => {
+            Ok(SourceFileAndLine { fm: f, line: a }) => {
                 let line = a + 1; // Line numbers start at 1
                 let linebpos = f.lines[a];
                 let linechpos = self.bytepos_to_file_charpos(linebpos);
@@ -385,14 +387,14 @@ impl CodeMap {
         }
     }
 
-    // If the relevant filemap is empty, we don't return a line number.
-    pub fn lookup_line(&self, pos: BytePos) -> Result<FileMapAndLine, Lrc<FileMap>> {
-        let idx = self.lookup_filemap_idx(pos);
+    // If the relevant source_file is empty, we don't return a line number.
+    pub fn lookup_line(&self, pos: BytePos) -> Result<SourceFileAndLine, Lrc<SourceFile>> {
+        let idx = self.lookup_source_file_idx(pos);
 
         let f = (*self.files.borrow().file_maps)[idx].clone();
 
         match f.lookup_line(pos) {
-            Some(line) => Ok(FileMapAndLine { fm: f, line: line }),
+            Some(line) => Ok(SourceFileAndLine { fm: f, line: line }),
             None => Err(f)
         }
     }
@@ -463,7 +465,7 @@ impl CodeMap {
 
     pub fn span_to_unmapped_path(&self, sp: Span) -> FileName {
         self.lookup_char_pos(sp.lo()).file.unmapped_path.clone()
-            .expect("CodeMap::span_to_unmapped_path called for imported FileMap?")
+            .expect("SourceMap::span_to_unmapped_path called for imported SourceFile?")
     }
 
     pub fn is_multiline(&self, sp: Span) -> bool {
@@ -541,7 +543,7 @@ impl CodeMap {
                       local_end.fm.start_pos)
             }));
         } else {
-            self.ensure_filemap_source_present(local_begin.fm.clone());
+            self.ensure_source_file_source_present(local_begin.fm.clone());
 
             let start_index = local_begin.pos.to_usize();
             let end_index = local_end.pos.to_usize();
@@ -798,7 +800,7 @@ impl CodeMap {
         }
     }
 
-    pub fn get_filemap(&self, filename: &FileName) -> Option<Lrc<FileMap>> {
+    pub fn get_source_file(&self, filename: &FileName) -> Option<Lrc<SourceFile>> {
         for fm in self.files.borrow().file_maps.iter() {
             if *filename == fm.name {
                 return Some(fm.clone());
@@ -807,20 +809,20 @@ impl CodeMap {
         None
     }
 
-    /// For a global BytePos compute the local offset within the containing FileMap
-    pub fn lookup_byte_offset(&self, bpos: BytePos) -> FileMapAndBytePos {
-        let idx = self.lookup_filemap_idx(bpos);
+    /// For a global BytePos compute the local offset within the containing SourceFile
+    pub fn lookup_byte_offset(&self, bpos: BytePos) -> SourceFileAndBytePos {
+        let idx = self.lookup_source_file_idx(bpos);
         let fm = (*self.files.borrow().file_maps)[idx].clone();
         let offset = bpos - fm.start_pos;
-        FileMapAndBytePos {fm: fm, pos: offset}
+        SourceFileAndBytePos {fm: fm, pos: offset}
     }
 
-    /// Converts an absolute BytePos to a CharPos relative to the filemap.
+    /// Converts an absolute BytePos to a CharPos relative to the source_file.
     pub fn bytepos_to_file_charpos(&self, bpos: BytePos) -> CharPos {
-        let idx = self.lookup_filemap_idx(bpos);
+        let idx = self.lookup_source_file_idx(bpos);
         let map = &(*self.files.borrow().file_maps)[idx];
 
-        // The number of extra bytes due to multibyte chars in the FileMap
+        // The number of extra bytes due to multibyte chars in the SourceFile
         let mut total_extra_bytes = 0;
 
         for mbc in map.multibyte_chars.iter() {
@@ -841,13 +843,13 @@ impl CodeMap {
         CharPos(bpos.to_usize() - map.start_pos.to_usize() - total_extra_bytes as usize)
     }
 
-    // Return the index of the filemap (in self.files) which contains pos.
-    pub fn lookup_filemap_idx(&self, pos: BytePos) -> usize {
+    // Return the index of the source_file (in self.files) which contains pos.
+    pub fn lookup_source_file_idx(&self, pos: BytePos) -> usize {
         let files = self.files.borrow();
         let files = &files.file_maps;
         let count = files.len();
 
-        // Binary search for the filemap.
+        // Binary search for the source_file.
         let mut a = 0;
         let mut b = count;
         while b - a > 1 {
@@ -895,7 +897,7 @@ impl CodeMap {
     ///
     /// Attention: The method used is very fragile since it essentially duplicates the work of the
     /// parser. If you need to use this function or something similar, please consider updating the
-    /// codemap functions and this function to something more robust.
+    /// source_map functions and this function to something more robust.
     pub fn generate_local_type_param_snippet(&self, span: Span) -> Option<(Span, String)> {
         // Try to extend the span to the previous "fn" keyword to retrieve the function
         // signature
@@ -941,7 +943,7 @@ impl CodeMap {
     }
 }
 
-impl CodeMapper for CodeMap {
+impl SourceMapper for SourceMap {
     fn lookup_char_pos(&self, pos: BytePos) -> Loc {
         self.lookup_char_pos(pos)
     }
@@ -966,7 +968,7 @@ impl CodeMapper for CodeMap {
         }
         sp
     }
-    fn ensure_filemap_source_present(&self, file_map: Lrc<FileMap>) -> bool {
+    fn ensure_source_file_source_present(&self, file_map: Lrc<SourceFile>) -> bool {
         file_map.add_external_src(
             || match file_map.name {
                 FileName::Real(ref name) => self.file_loader.read_file(name).ok(),
@@ -1023,13 +1025,13 @@ mod tests {
     use super::*;
     use rustc_data_structures::sync::Lrc;
 
-    fn init_code_map() -> CodeMap {
-        let cm = CodeMap::new(FilePathMapping::empty());
-        cm.new_filemap(PathBuf::from("blork.rs").into(),
+    fn init_code_map() -> SourceMap {
+        let cm = SourceMap::new(FilePathMapping::empty());
+        cm.new_source_file(PathBuf::from("blork.rs").into(),
                        "first line.\nsecond line".to_string());
-        cm.new_filemap(PathBuf::from("empty.rs").into(),
+        cm.new_source_file(PathBuf::from("empty.rs").into(),
                        "".to_string());
-        cm.new_filemap(PathBuf::from("blork2.rs").into(),
+        cm.new_source_file(PathBuf::from("blork2.rs").into(),
                        "first line.\nsecond line".to_string());
         cm
     }
@@ -1066,7 +1068,7 @@ mod tests {
 
     #[test]
     fn t5() {
-        // Test zero-length filemaps.
+        // Test zero-length source_files.
         let cm = init_code_map();
 
         let loc1 = cm.lookup_char_pos(BytePos(22));
@@ -1080,12 +1082,12 @@ mod tests {
         assert_eq!(loc2.col, CharPos(0));
     }
 
-    fn init_code_map_mbc() -> CodeMap {
-        let cm = CodeMap::new(FilePathMapping::empty());
+    fn init_code_map_mbc() -> SourceMap {
+        let cm = SourceMap::new(FilePathMapping::empty());
         // € is a three byte utf8 char.
-        cm.new_filemap(PathBuf::from("blork.rs").into(),
+        cm.new_source_file(PathBuf::from("blork.rs").into(),
                        "fir€st €€€€ line.\nsecond line".to_string());
-        cm.new_filemap(PathBuf::from("blork2.rs").into(),
+        cm.new_source_file(PathBuf::from("blork2.rs").into(),
                        "first line€€.\n€ second line".to_string());
         cm
     }
@@ -1110,7 +1112,7 @@ mod tests {
 
     #[test]
     fn t7() {
-        // Test span_to_lines for a span ending at the end of filemap
+        // Test span_to_lines for a span ending at the end of source_file
         let cm = init_code_map();
         let span = Span::new(BytePos(12), BytePos(23), NO_EXPANSION);
         let file_lines = cm.span_to_lines(span).unwrap();
@@ -1135,10 +1137,10 @@ mod tests {
     /// lines in the middle of a file.
     #[test]
     fn span_to_snippet_and_lines_spanning_multiple_lines() {
-        let cm = CodeMap::new(FilePathMapping::empty());
+        let cm = SourceMap::new(FilePathMapping::empty());
         let inputtext = "aaaaa\nbbbbBB\nCCC\nDDDDDddddd\neee\n";
         let selection = "     \n    ~~\n~~~\n~~~~~     \n   \n";
-        cm.new_filemap(Path::new("blork.rs").to_owned().into(), inputtext.to_string());
+        cm.new_source_file(Path::new("blork.rs").to_owned().into(), inputtext.to_string());
         let span = span_from_selection(inputtext, selection);
 
         // check that we are extracting the text we thought we were extracting
@@ -1156,7 +1158,7 @@ mod tests {
 
     #[test]
     fn t8() {
-        // Test span_to_snippet for a span ending at the end of filemap
+        // Test span_to_snippet for a span ending at the end of source_file
         let cm = init_code_map();
         let span = Span::new(BytePos(12), BytePos(23), NO_EXPANSION);
         let snippet = cm.span_to_snippet(span);
@@ -1166,7 +1168,7 @@ mod tests {
 
     #[test]
     fn t9() {
-        // Test span_to_str for a span ending at the end of filemap
+        // Test span_to_str for a span ending at the end of source_file
         let cm = init_code_map();
         let span = Span::new(BytePos(12), BytePos(23), NO_EXPANSION);
         let sstr =  cm.span_to_string(span);
@@ -1177,11 +1179,11 @@ mod tests {
     /// Test failing to merge two spans on different lines
     #[test]
     fn span_merging_fail() {
-        let cm = CodeMap::new(FilePathMapping::empty());
+        let cm = SourceMap::new(FilePathMapping::empty());
         let inputtext  = "bbbb BB\ncc CCC\n";
         let selection1 = "     ~~\n      \n";
         let selection2 = "       \n   ~~~\n";
-        cm.new_filemap(Path::new("blork.rs").to_owned().into(), inputtext.to_owned());
+        cm.new_source_file(Path::new("blork.rs").to_owned().into(), inputtext.to_owned());
         let span1 = span_from_selection(inputtext, selection1);
         let span2 = span_from_selection(inputtext, selection2);
 
@@ -1190,18 +1192,18 @@ mod tests {
 
     /// Returns the span corresponding to the `n`th occurrence of
     /// `substring` in `source_text`.
-    trait CodeMapExtension {
+    trait SourceMapExtension {
         fn span_substr(&self,
-                    file: &Lrc<FileMap>,
+                    file: &Lrc<SourceFile>,
                     source_text: &str,
                     substring: &str,
                     n: usize)
                     -> Span;
     }
 
-    impl CodeMapExtension for CodeMap {
+    impl SourceMapExtension for SourceMap {
         fn span_substr(&self,
-                    file: &Lrc<FileMap>,
+                    file: &Lrc<SourceFile>,
                     source_text: &str,
                     substring: &str,
                     n: usize)
diff --git a/src/libsyntax/std_inject.rs b/src/libsyntax/std_inject.rs
index 626a610017d..1210f331b28 100644
--- a/src/libsyntax/std_inject.rs
+++ b/src/libsyntax/std_inject.rs
@@ -16,12 +16,12 @@ use edition::Edition;
 use ext::hygiene::{Mark, SyntaxContext};
 use symbol::{Symbol, keywords};
 use syntax_pos::{DUMMY_SP, Span};
-use codemap::{ExpnInfo, MacroAttribute, dummy_spanned, hygiene, respan};
+use source_map::{ExpnInfo, MacroAttribute, dummy_spanned, hygiene, respan};
 use ptr::P;
 use tokenstream::TokenStream;
 
 /// Craft a span that will be ignored by the stability lint's
-/// call to codemap's `is_internal` check.
+/// call to source_map's `is_internal` check.
 /// The expanded code uses the unstable `#[prelude_import]` attribute.
 fn ignored_span(sp: Span) -> Span {
     let mark = Mark::fresh(Mark::root());
diff --git a/src/libsyntax/test.rs b/src/libsyntax/test.rs
index 1cbaf3cc312..988f50b4f0c 100644
--- a/src/libsyntax/test.rs
+++ b/src/libsyntax/test.rs
@@ -20,9 +20,9 @@ use std::slice;
 use std::mem;
 use std::vec;
 use attr::{self, HasAttrs};
-use syntax_pos::{self, DUMMY_SP, NO_EXPANSION, Span, FileMap, BytePos};
+use syntax_pos::{self, DUMMY_SP, NO_EXPANSION, Span, SourceFile, BytePos};
 
-use codemap::{self, CodeMap, ExpnInfo, MacroAttribute, dummy_spanned};
+use source_map::{self, SourceMap, ExpnInfo, MacroAttribute, dummy_spanned};
 use errors;
 use config;
 use entry::{self, EntryPointType};
@@ -324,7 +324,7 @@ fn generate_test_harness(sess: &ParseSess,
 }
 
 /// Craft a span that will be ignored by the stability lint's
-/// call to codemap's `is_internal` check.
+/// call to source_map's `is_internal` check.
 /// The expanded code calls some unstable functions in the test crate.
 fn ignored_span(cx: &TestCtxt, sp: Span) -> Span {
     sp.with_ctxt(cx.ctxt)
@@ -616,8 +616,8 @@ fn mk_test_module(cx: &mut TestCtxt) -> (P<ast::Item>, Option<P<ast::Item>>) {
     (item, reexport)
 }
 
-fn nospan<T>(t: T) -> codemap::Spanned<T> {
-    codemap::Spanned { node: t, span: DUMMY_SP }
+fn nospan<T>(t: T) -> source_map::Spanned<T> {
+    source_map::Spanned { node: t, span: DUMMY_SP }
 }
 
 fn path_node(ids: Vec<Ident>) -> ast::Path {
diff --git a/src/libsyntax/test_snippet.rs b/src/libsyntax/test_snippet.rs
index c7e4fbd1073..d49965fd936 100644
--- a/src/libsyntax/test_snippet.rs
+++ b/src/libsyntax/test_snippet.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use codemap::{CodeMap, FilePathMapping};
+use source_map::{SourceMap, FilePathMapping};
 use errors::Handler;
 use errors::emitter::EmitterWriter;
 use std::io;
@@ -50,8 +50,8 @@ fn test_harness(file_text: &str, span_labels: Vec<SpanLabel>, expected_output: &
     with_globals(|| {
         let output = Arc::new(Mutex::new(Vec::new()));
 
-        let code_map = Lrc::new(CodeMap::new(FilePathMapping::empty()));
-        code_map.new_filemap(Path::new("test.rs").to_owned().into(), file_text.to_owned());
+        let code_map = Lrc::new(SourceMap::new(FilePathMapping::empty()));
+        code_map.new_source_file(Path::new("test.rs").to_owned().into(), file_text.to_owned());
 
         let primary_span = make_span(&file_text, &span_labels[0].start, &span_labels[0].end);
         let mut msp = MultiSpan::from_span(primary_span);
diff --git a/src/libsyntax/util/parser_testing.rs b/src/libsyntax/util/parser_testing.rs
index 46b7f2d7bda..374154e6333 100644
--- a/src/libsyntax/util/parser_testing.rs
+++ b/src/libsyntax/util/parser_testing.rs
@@ -9,8 +9,8 @@
 // except according to those terms.
 
 use ast::{self, Ident};
-use codemap::FilePathMapping;
-use parse::{ParseSess, PResult, filemap_to_stream};
+use source_map::FilePathMapping;
+use parse::{ParseSess, PResult, source_file_to_stream};
 use parse::{lexer, new_parser_from_source_str};
 use parse::parser::Parser;
 use ptr::P;
@@ -21,8 +21,8 @@ use std::path::PathBuf;
 /// Map a string to tts, using a made-up filename:
 pub fn string_to_stream(source_str: String) -> TokenStream {
     let ps = ParseSess::new(FilePathMapping::empty());
-    filemap_to_stream(&ps, ps.codemap()
-                             .new_filemap(PathBuf::from("bogofile").into(), source_str), None)
+    source_file_to_stream(&ps, ps.source_map()
+                             .new_source_file(PathBuf::from("bogofile").into(), source_str), None)
 }
 
 /// Map string to parser (via tts)