Create rustfmt_core crate

1 files changed, 0 insertions, 379 deletions

diff --git a/src/patterns.rs b/src/patterns.rs
deleted file mode 100644
index 4719160061b..00000000000
--- a/src/patterns.rs
+++ /dev/null
@@ -1,379 +0,0 @@
-// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-use syntax::ast::{self, BindingMode, FieldPat, Pat, PatKind, RangeEnd, RangeSyntax};
-use syntax::codemap::{self, BytePos, Span};
-use syntax::ptr;
-
-use codemap::SpanUtils;
-use comment::FindUncommented;
-use expr::{can_be_overflowed_expr, rewrite_call_inner, rewrite_pair, rewrite_unary_prefix,
-           wrap_struct_field, PairParts};
-use lists::{itemize_list, shape_for_tactic, struct_lit_formatting, struct_lit_shape,
-            struct_lit_tactic, write_list, DefinitiveListTactic, SeparatorPlace, SeparatorTactic};
-use macros::{rewrite_macro, MacroPosition};
-use rewrite::{Rewrite, RewriteContext};
-use shape::Shape;
-use spanned::Spanned;
-use types::{rewrite_path, PathContext};
-use utils::{format_mutability, mk_sp};
-
-impl Rewrite for Pat {
-    fn rewrite(&self, context: &RewriteContext, shape: Shape) -> Option<String> {
-        match self.node {
-            PatKind::Box(ref pat) => rewrite_unary_prefix(context, "box ", &**pat, shape),
-            PatKind::Ident(binding_mode, ident, ref sub_pat) => {
-                let (prefix, mutability) = match binding_mode {
-                    BindingMode::ByRef(mutability) => ("ref ", mutability),
-                    BindingMode::ByValue(mutability) => ("", mutability),
-                };
-                let mut_infix = format_mutability(mutability);
-                let id_str = ident.node.to_string();
-                let sub_pat = match *sub_pat {
-                    Some(ref p) => {
-                        // 3 - ` @ `.
-                        let width = shape
-                            .width
-                            .checked_sub(prefix.len() + mut_infix.len() + id_str.len() + 3)?;
-                        format!(
-                            " @ {}",
-                            p.rewrite(context, Shape::legacy(width, shape.indent))?
-                        )
-                    }
-                    None => "".to_owned(),
-                };
-
-                Some(format!("{}{}{}{}", prefix, mut_infix, id_str, sub_pat))
-            }
-            PatKind::Wild => {
-                if 1 <= shape.width {
-                    Some("_".to_owned())
-                } else {
-                    None
-                }
-            }
-            PatKind::Range(ref lhs, ref rhs, ref end_kind) => {
-                let infix = match *end_kind {
-                    RangeEnd::Included(RangeSyntax::DotDotDot) => "...",
-                    RangeEnd::Included(RangeSyntax::DotDotEq) => "..=",
-                    RangeEnd::Excluded => "..",
-                };
-                let infix = if context.config.spaces_around_ranges() {
-                    format!(" {} ", infix)
-                } else {
-                    infix.to_owned()
-                };
-                rewrite_pair(
-                    &**lhs,
-                    &**rhs,
-                    PairParts::new("", &infix, ""),
-                    context,
-                    shape,
-                    SeparatorPlace::Front,
-                )
-            }
-            PatKind::Ref(ref pat, mutability) => {
-                let prefix = format!("&{}", format_mutability(mutability));
-                rewrite_unary_prefix(context, &prefix, &**pat, shape)
-            }
-            PatKind::Tuple(ref items, dotdot_pos) => {
-                rewrite_tuple_pat(items, dotdot_pos, None, self.span, context, shape)
-            }
-            PatKind::Path(ref q_self, ref path) => {
-                rewrite_path(context, PathContext::Expr, q_self.as_ref(), path, shape)
-            }
-            PatKind::TupleStruct(ref path, ref pat_vec, dotdot_pos) => {
-                let path_str = rewrite_path(context, PathContext::Expr, None, path, shape)?;
-                rewrite_tuple_pat(
-                    pat_vec,
-                    dotdot_pos,
-                    Some(path_str),
-                    self.span,
-                    context,
-                    shape,
-                )
-            }
-            PatKind::Lit(ref expr) => expr.rewrite(context, shape),
-            PatKind::Slice(ref prefix, ref slice_pat, ref suffix) => {
-                // Rewrite all the sub-patterns.
-                let prefix = prefix.iter().map(|p| p.rewrite(context, shape));
-                let slice_pat = slice_pat
-                    .as_ref()
-                    .map(|p| Some(format!("{}..", p.rewrite(context, shape)?)));
-                let suffix = suffix.iter().map(|p| p.rewrite(context, shape));
-
-                // Munge them together.
-                let pats: Option<Vec<String>> =
-                    prefix.chain(slice_pat.into_iter()).chain(suffix).collect();
-
-                // Check that all the rewrites succeeded, and if not return None.
-                let pats = pats?;
-
-                // Unwrap all the sub-strings and join them with commas.
-                let result = if context.config.spaces_within_parens_and_brackets() {
-                    format!("[ {} ]", pats.join(", "))
-                } else {
-                    format!("[{}]", pats.join(", "))
-                };
-                Some(result)
-            }
-            PatKind::Struct(ref path, ref fields, ellipsis) => {
-                rewrite_struct_pat(path, fields, ellipsis, self.span, context, shape)
-            }
-            PatKind::Mac(ref mac) => rewrite_macro(mac, None, context, shape, MacroPosition::Pat),
-        }
-    }
-}
-
-fn rewrite_struct_pat(
-    path: &ast::Path,
-    fields: &[codemap::Spanned<ast::FieldPat>],
-    ellipsis: bool,
-    span: Span,
-    context: &RewriteContext,
-    shape: Shape,
-) -> Option<String> {
-    // 2 =  ` {`
-    let path_shape = shape.sub_width(2)?;
-    let path_str = rewrite_path(context, PathContext::Expr, None, path, path_shape)?;
-
-    if fields.is_empty() && !ellipsis {
-        return Some(format!("{} {{}}", path_str));
-    }
-
-    let (ellipsis_str, terminator) = if ellipsis { (", ..", "..") } else { ("", "}") };
-
-    // 3 = ` { `, 2 = ` }`.
-    let (h_shape, v_shape) =
-        struct_lit_shape(shape, context, path_str.len() + 3, ellipsis_str.len() + 2)?;
-
-    let items = itemize_list(
-        context.codemap,
-        fields.iter(),
-        terminator,
-        ",",
-        |f| f.span.lo(),
-        |f| f.span.hi(),
-        |f| f.node.rewrite(context, v_shape),
-        context.codemap.span_after(span, "{"),
-        span.hi(),
-        false,
-    );
-    let item_vec = items.collect::<Vec<_>>();
-
-    let tactic = struct_lit_tactic(h_shape, context, &item_vec);
-    let nested_shape = shape_for_tactic(tactic, h_shape, v_shape);
-    let fmt = struct_lit_formatting(nested_shape, tactic, context, false);
-
-    let mut fields_str = write_list(&item_vec, &fmt)?;
-    let one_line_width = h_shape.map_or(0, |shape| shape.width);
-
-    if ellipsis {
-        if fields_str.contains('\n') || fields_str.len() > one_line_width {
-            // Add a missing trailing comma.
-            if fmt.trailing_separator == SeparatorTactic::Never {
-                fields_str.push_str(",");
-            }
-            fields_str.push_str("\n");
-            fields_str.push_str(&nested_shape.indent.to_string(context.config));
-            fields_str.push_str("..");
-        } else {
-            if !fields_str.is_empty() {
-                // there are preceding struct fields being matched on
-                if fmt.tactic == DefinitiveListTactic::Vertical {
-                    // if the tactic is Vertical, write_list already added a trailing ,
-                    fields_str.push_str(" ");
-                } else {
-                    fields_str.push_str(", ");
-                }
-            }
-            fields_str.push_str("..");
-        }
-    }
-
-    let fields_str = wrap_struct_field(context, &fields_str, shape, v_shape, one_line_width);
-    Some(format!("{} {{{}}}", path_str, fields_str))
-}
-
-impl Rewrite for FieldPat {
-    fn rewrite(&self, context: &RewriteContext, shape: Shape) -> Option<String> {
-        let pat = self.pat.rewrite(context, shape);
-        if self.is_shorthand {
-            pat
-        } else {
-            let pat_str = pat?;
-            let id_str = self.ident.to_string();
-            let one_line_width = id_str.len() + 2 + pat_str.len();
-            if one_line_width <= shape.width {
-                Some(format!("{}: {}", id_str, pat_str))
-            } else {
-                let nested_shape = shape.block_indent(context.config.tab_spaces());
-                let pat_str = self.pat.rewrite(context, nested_shape)?;
-                Some(format!(
-                    "{}:\n{}{}",
-                    id_str,
-                    nested_shape.indent.to_string(context.config),
-                    pat_str,
-                ))
-            }
-        }
-    }
-}
-
-pub enum TuplePatField<'a> {
-    Pat(&'a ptr::P<ast::Pat>),
-    Dotdot(Span),
-}
-
-impl<'a> Rewrite for TuplePatField<'a> {
-    fn rewrite(&self, context: &RewriteContext, shape: Shape) -> Option<String> {
-        match *self {
-            TuplePatField::Pat(p) => p.rewrite(context, shape),
-            TuplePatField::Dotdot(_) => Some("..".to_string()),
-        }
-    }
-}
-
-impl<'a> Spanned for TuplePatField<'a> {
-    fn span(&self) -> Span {
-        match *self {
-            TuplePatField::Pat(p) => p.span(),
-            TuplePatField::Dotdot(span) => span,
-        }
-    }
-}
-
-pub fn can_be_overflowed_pat(context: &RewriteContext, pat: &TuplePatField, len: usize) -> bool {
-    match *pat {
-        TuplePatField::Pat(pat) => match pat.node {
-            ast::PatKind::Path(..)
-            | ast::PatKind::Tuple(..)
-            | ast::PatKind::Struct(..)
-            | ast::PatKind::TupleStruct(..) => context.use_block_indent() && len == 1,
-            ast::PatKind::Ref(ref p, _) | ast::PatKind::Box(ref p) => {
-                can_be_overflowed_pat(context, &TuplePatField::Pat(p), len)
-            }
-            ast::PatKind::Lit(ref expr) => can_be_overflowed_expr(context, expr, len),
-            _ => false,
-        },
-        TuplePatField::Dotdot(..) => false,
-    }
-}
-
-fn rewrite_tuple_pat(
-    pats: &[ptr::P<ast::Pat>],
-    dotdot_pos: Option<usize>,
-    path_str: Option<String>,
-    span: Span,
-    context: &RewriteContext,
-    shape: Shape,
-) -> Option<String> {
-    let mut pat_vec: Vec<_> = pats.into_iter().map(|x| TuplePatField::Pat(x)).collect();
-
-    if let Some(pos) = dotdot_pos {
-        let prev = if pos == 0 {
-            span.lo()
-        } else {
-            pats[pos - 1].span().hi()
-        };
-        let next = if pos + 1 >= pats.len() {
-            span.hi()
-        } else {
-            pats[pos + 1].span().lo()
-        };
-        let dot_span = mk_sp(prev, next);
-        let snippet = context.snippet(dot_span);
-        let lo = dot_span.lo() + BytePos(snippet.find_uncommented("..").unwrap() as u32);
-        let dotdot = TuplePatField::Dotdot(Span::new(
-            lo,
-            // 2 == "..".len()
-            lo + BytePos(2),
-            codemap::NO_EXPANSION,
-        ));
-        pat_vec.insert(pos, dotdot);
-    }
-
-    if pat_vec.is_empty() {
-        return Some(format!("{}()", path_str.unwrap_or_default()));
-    }
-
-    let wildcard_suffix_len = count_wildcard_suffix_len(context, &pat_vec, span, shape);
-    let (pat_vec, span) = if context.config.condense_wildcard_suffixes() && wildcard_suffix_len >= 2
-    {
-        let new_item_count = 1 + pat_vec.len() - wildcard_suffix_len;
-        let sp = pat_vec[new_item_count - 1].span();
-        let snippet = context.snippet(sp);
-        let lo = sp.lo() + BytePos(snippet.find_uncommented("_").unwrap() as u32);
-        pat_vec[new_item_count - 1] = TuplePatField::Dotdot(mk_sp(lo, lo + BytePos(1)));
-        (
-            &pat_vec[..new_item_count],
-            mk_sp(span.lo(), lo + BytePos(1)),
-        )
-    } else {
-        (&pat_vec[..], span)
-    };
-
-    // add comma if `(x,)`
-    let add_comma = path_str.is_none() && pat_vec.len() == 1 && dotdot_pos.is_none();
-    let mut context = context.clone();
-    if let Some(&TuplePatField::Dotdot(..)) = pat_vec.last() {
-        context.inside_macro = true;
-    }
-    let path_str = path_str.unwrap_or_default();
-    let mut pat_ref_vec = Vec::with_capacity(pat_vec.len());
-    for pat in pat_vec {
-        pat_ref_vec.push(pat);
-    }
-
-    rewrite_call_inner(
-        &context,
-        &path_str,
-        &pat_ref_vec[..],
-        span,
-        shape,
-        shape.width,
-        add_comma,
-    )
-}
-
-fn count_wildcard_suffix_len(
-    context: &RewriteContext,
-    patterns: &[TuplePatField],
-    span: Span,
-    shape: Shape,
-) -> usize {
-    let mut suffix_len = 0;
-
-    let items: Vec<_> = itemize_list(
-        context.codemap,
-        patterns.iter(),
-        ")",
-        ",",
-        |item| item.span().lo(),
-        |item| item.span().hi(),
-        |item| item.rewrite(context, shape),
-        context.codemap.span_after(span, "("),
-        span.hi() - BytePos(1),
-        false,
-    ).collect();
-
-    for item in items.iter().rev().take_while(|i| match i.item {
-        Some(ref internal_string) if internal_string == "_" => true,
-        _ => false,
-    }) {
-        suffix_len += 1;
-
-        if item.pre_comment.is_some() || item.post_comment.is_some() {
-            break;
-        }
-    }
-
-    suffix_len
-}