diff options
Diffstat (limited to 'src/libsyntax/parse/parser.rs')
| -rw-r--r-- | src/libsyntax/parse/parser.rs | 73 |
1 files changed, 41 insertions, 32 deletions
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs index 2428710087f..40a2ef86e4f 100644 --- a/src/libsyntax/parse/parser.rs +++ b/src/libsyntax/parse/parser.rs @@ -29,8 +29,7 @@ use ast::{ExprField, ExprFnBlock, ExprIf, ExprIndex}; use ast::{ExprLit, ExprLogLevel, ExprLoop, ExprMac}; use ast::{ExprMethodCall, ExprParen, ExprPath, ExprProc, ExprRepeat}; use ast::{ExprRet, ExprSelf, ExprStruct, ExprTup, ExprUnary}; -use ast::{ExprVec, ExprVstore, ExprVstoreMutBox}; -use ast::{ExprVstoreSlice, ExprVstoreBox}; +use ast::{ExprVec, ExprVstore, ExprVstoreSlice, ExprVstoreBox}; use ast::{ExprVstoreMutSlice, ExprWhile, ExprForLoop, extern_fn, Field, fn_decl}; use ast::{ExprVstoreUniq, Onceness, Once, Many}; use ast::{foreign_item, foreign_item_static, foreign_item_fn, foreign_mod}; @@ -81,6 +80,7 @@ use parse::{new_sub_parser_from_file, ParseSess}; use opt_vec; use opt_vec::OptVec; +use std::cell::Cell; use std::hashmap::HashSet; use std::util; use std::vec; @@ -286,8 +286,8 @@ struct ParsedItemsAndViewItems { /* ident is handled by common.rs */ -pub fn Parser(sess: @mut ParseSess, cfg: ast::CrateConfig, rdr: @mut reader) - -> Parser { +pub fn Parser(sess: @ParseSess, cfg: ast::CrateConfig, rdr: @reader) + -> Parser { let tok0 = rdr.next_token(); let interner = get_ident_interner(); let span = tok0.sp; @@ -324,7 +324,7 @@ pub fn Parser(sess: @mut ParseSess, cfg: ast::CrateConfig, rdr: @mut reader) } pub struct Parser { - sess: @mut ParseSess, + sess: @ParseSess, cfg: CrateConfig, // the current token: token: token::Token, @@ -340,7 +340,7 @@ pub struct Parser { tokens_consumed: uint, restriction: restriction, quote_depth: uint, // not (yet) related to the quasiquoter - reader: @mut reader, + reader: @reader, interner: @token::ident_interner, /// The set of seen errors about obsolete syntax. Used to suppress /// extra detail when the same error is seen twice @@ -1299,7 +1299,7 @@ impl Parser { if sigil == OwnedSigil { ty_uniq(self.parse_ty(false)) } else { - ty_box(self.parse_mt()) + ty_box(self.parse_ty(false)) } } @@ -2185,7 +2185,7 @@ impl Parser { // unification of matchers and token_trees would vastly improve // the interpolation of matchers maybe_whole!(self, nt_matchers); - let name_idx = @mut 0u; + let name_idx = @Cell::new(0u); match self.token { token::LBRACE | token::LPAREN | token::LBRACKET => { let other_delimiter = token::flip_delimiter(&self.token); @@ -2200,7 +2200,7 @@ impl Parser { // Otherwise, `$( ( )` would be a valid matcher, and `$( () )` would be // invalid. It's similar to common::parse_seq. pub fn parse_matcher_subseq_upto(&mut self, - name_idx: @mut uint, + name_idx: @Cell<uint>, ket: &token::Token) -> ~[matcher] { let mut ret_val = ~[]; @@ -2217,13 +2217,13 @@ impl Parser { return ret_val; } - pub fn parse_matcher(&mut self, name_idx: @mut uint) -> matcher { + pub fn parse_matcher(&mut self, name_idx: @Cell<uint>) -> matcher { let lo = self.span.lo; let m = if self.token == token::DOLLAR { self.bump(); if self.token == token::LPAREN { - let name_idx_lo = *name_idx; + let name_idx_lo = name_idx.get(); self.bump(); let ms = self.parse_matcher_subseq_upto(name_idx, &token::RPAREN); @@ -2231,13 +2231,13 @@ impl Parser { self.fatal("repetition body must be nonempty"); } let (sep, zerok) = self.parse_sep_and_zerok(); - match_seq(ms, sep, zerok, name_idx_lo, *name_idx) + match_seq(ms, sep, zerok, name_idx_lo, name_idx.get()) } else { let bound_to = self.parse_ident(); self.expect(&token::COLON); let nt_name = self.parse_ident(); - let m = match_nonterminal(bound_to, nt_name, *name_idx); - *name_idx += 1u; + let m = match_nonterminal(bound_to, nt_name, name_idx.get()); + name_idx.set(name_idx.get() + 1u); m } } else { @@ -2299,17 +2299,14 @@ impl Parser { } token::AT => { self.bump(); - let m = self.parse_mutability(); let e = self.parse_prefix_expr(); hi = e.span.hi; // HACK: turn @[...] into a @-evec ex = match e.node { - ExprVec(..) | ExprRepeat(..) if m == MutMutable => - ExprVstore(e, ExprVstoreMutBox), ExprVec(..) | ExprLit(@codemap::Spanned { node: lit_str(..), span: _}) | - ExprRepeat(..) if m == MutImmutable => ExprVstore(e, ExprVstoreBox), - _ => self.mk_unary(UnBox(m), e) + ExprRepeat(..) => ExprVstore(e, ExprVstoreBox), + _ => self.mk_unary(UnBox, e) }; } token::TILDE => { @@ -4264,21 +4261,28 @@ impl Parser { path: Path, outer_attrs: ~[ast::Attribute], id_sp: Span) -> (ast::item_, ~[ast::Attribute]) { - let maybe_i = self.sess.included_mod_stack.iter().position(|p| *p == path); - match maybe_i { - Some(i) => { - let stack = &self.sess.included_mod_stack; - let mut err = ~"circular modules: "; - for p in stack.slice(i, stack.len()).iter() { - p.display().with_str(|s| err.push_str(s)); - err.push_str(" -> "); + { + let mut included_mod_stack = self.sess + .included_mod_stack + .borrow_mut(); + let maybe_i = included_mod_stack.get() + .iter() + .position(|p| *p == path); + match maybe_i { + Some(i) => { + let mut err = ~"circular modules: "; + let len = included_mod_stack.get().len(); + for p in included_mod_stack.get().slice(i, len).iter() { + p.display().with_str(|s| err.push_str(s)); + err.push_str(" -> "); + } + path.display().with_str(|s| err.push_str(s)); + self.span_fatal(id_sp, err); } - path.display().with_str(|s| err.push_str(s)); - self.span_fatal(id_sp, err); + None => () } - None => () + included_mod_stack.get().push(path.clone()); } - self.sess.included_mod_stack.push(path.clone()); let mut p0 = new_sub_parser_from_file(self.sess, @@ -4289,7 +4293,12 @@ impl Parser { let mod_attrs = vec::append(outer_attrs, inner); let first_item_outer_attrs = next; let m0 = p0.parse_mod_items(token::EOF, first_item_outer_attrs); - self.sess.included_mod_stack.pop(); + { + let mut included_mod_stack = self.sess + .included_mod_stack + .borrow_mut(); + included_mod_stack.get().pop(); + } return (ast::item_mod(m0), mod_attrs); } |