770 lines
28 KiB
Rust
770 lines
28 KiB
Rust
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use syntax::attr::HasAttrs;
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use syntax::codemap::{self, BytePos, CodeMap, Pos, Span};
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use syntax::parse::ParseSess;
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use syntax::{ast, visit};
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use attr::*;
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use codemap::{LineRangeUtils, SpanUtils};
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use comment::{CodeCharKind, CommentCodeSlices, FindUncommented};
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use config::{BraceStyle, Config};
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use items::{
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format_impl, format_trait, format_trait_alias, is_mod_decl, is_use_item,
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rewrite_associated_impl_type, rewrite_associated_type, rewrite_extern_crate,
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rewrite_type_alias, FnSig, StaticParts, StructParts,
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};
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use macros::{rewrite_macro, rewrite_macro_def, MacroPosition};
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use rewrite::{Rewrite, RewriteContext};
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use shape::{Indent, Shape};
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use spanned::Spanned;
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use utils::{
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self, contains_skip, count_newlines, inner_attributes, mk_sp, ptr_vec_to_ref_vec,
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DEPR_SKIP_ANNOTATION,
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};
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use {ErrorKind, FormatReport, FormattingError};
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use std::cell::RefCell;
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/// Creates a string slice corresponding to the specified span.
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pub struct SnippetProvider<'a> {
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/// A pointer to the content of the file we are formatting.
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big_snippet: &'a str,
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/// A position of the start of `big_snippet`, used as an offset.
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start_pos: usize,
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}
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impl<'a> SnippetProvider<'a> {
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pub fn span_to_snippet(&self, span: Span) -> Option<&str> {
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let start_index = span.lo().to_usize().checked_sub(self.start_pos)?;
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let end_index = span.hi().to_usize().checked_sub(self.start_pos)?;
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Some(&self.big_snippet[start_index..end_index])
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}
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pub fn new(start_pos: BytePos, big_snippet: &'a str) -> Self {
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let start_pos = start_pos.to_usize();
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SnippetProvider {
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big_snippet,
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start_pos,
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}
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}
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}
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pub struct FmtVisitor<'a> {
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pub parse_session: &'a ParseSess,
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pub codemap: &'a CodeMap,
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pub buffer: String,
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pub last_pos: BytePos,
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// FIXME: use an RAII util or closure for indenting
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pub block_indent: Indent,
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pub config: &'a Config,
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pub is_if_else_block: bool,
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pub snippet_provider: &'a SnippetProvider<'a>,
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pub line_number: usize,
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pub skipped_range: Vec<(usize, usize)>,
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pub macro_rewrite_failure: bool,
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pub(crate) report: FormatReport,
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}
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impl<'b, 'a: 'b> FmtVisitor<'a> {
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pub fn shape(&self) -> Shape {
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Shape::indented(self.block_indent, self.config)
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}
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fn visit_stmt(&mut self, stmt: &ast::Stmt) {
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debug!(
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"visit_stmt: {:?} {:?}",
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self.codemap.lookup_char_pos(stmt.span.lo()),
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self.codemap.lookup_char_pos(stmt.span.hi())
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);
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match stmt.node {
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ast::StmtKind::Item(ref item) => {
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self.visit_item(item);
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}
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ast::StmtKind::Local(..) | ast::StmtKind::Expr(..) | ast::StmtKind::Semi(..) => {
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if contains_skip(get_attrs_from_stmt(stmt)) {
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self.push_skipped_with_span(stmt.span());
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} else {
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let rewrite = stmt.rewrite(&self.get_context(), self.shape());
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self.push_rewrite(stmt.span(), rewrite)
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}
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}
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ast::StmtKind::Mac(ref mac) => {
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let (ref mac, _macro_style, ref attrs) = **mac;
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if self.visit_attrs(attrs, ast::AttrStyle::Outer) {
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self.push_skipped_with_span(stmt.span());
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} else {
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self.visit_mac(mac, None, MacroPosition::Statement);
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}
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self.format_missing(stmt.span.hi());
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}
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}
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}
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pub fn visit_block(
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&mut self,
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b: &ast::Block,
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inner_attrs: Option<&[ast::Attribute]>,
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has_braces: bool,
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) {
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debug!(
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"visit_block: {:?} {:?}",
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self.codemap.lookup_char_pos(b.span.lo()),
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self.codemap.lookup_char_pos(b.span.hi())
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);
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// Check if this block has braces.
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let brace_compensation = BytePos(if has_braces { 1 } else { 0 });
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self.last_pos = self.last_pos + brace_compensation;
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self.block_indent = self.block_indent.block_indent(self.config);
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self.push_str("{");
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if let Some(first_stmt) = b.stmts.first() {
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let attr_lo = inner_attrs
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.and_then(|attrs| inner_attributes(attrs).first().map(|attr| attr.span.lo()))
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.or_else(|| {
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// Attributes for an item in a statement position
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// do not belong to the statement. (rust-lang/rust#34459)
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if let ast::StmtKind::Item(ref item) = first_stmt.node {
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item.attrs.first()
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} else {
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first_stmt.attrs().first()
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}.and_then(|attr| {
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// Some stmts can have embedded attributes.
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// e.g. `match { #![attr] ... }`
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let attr_lo = attr.span.lo();
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if attr_lo < first_stmt.span.lo() {
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Some(attr_lo)
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} else {
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None
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}
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})
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});
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let snippet = self.snippet(mk_sp(
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self.last_pos,
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attr_lo.unwrap_or_else(|| first_stmt.span.lo()),
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));
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let len = CommentCodeSlices::new(snippet)
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.nth(0)
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.and_then(|(kind, _, s)| {
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if kind == CodeCharKind::Normal {
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s.rfind('\n')
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} else {
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None
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}
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});
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if let Some(len) = len {
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self.last_pos = self.last_pos + BytePos::from_usize(len);
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}
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}
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// Format inner attributes if available.
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let skip_rewrite = if let Some(attrs) = inner_attrs {
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self.visit_attrs(attrs, ast::AttrStyle::Inner)
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} else {
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false
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};
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if skip_rewrite {
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self.push_rewrite(b.span, None);
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self.close_block(false);
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self.last_pos = source!(self, b.span).hi();
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return;
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}
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self.walk_block_stmts(b);
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if !b.stmts.is_empty() {
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if let Some(expr) = utils::stmt_expr(&b.stmts[b.stmts.len() - 1]) {
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if utils::semicolon_for_expr(&self.get_context(), expr) {
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self.push_str(";");
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}
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}
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}
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let mut remove_len = BytePos(0);
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if let Some(stmt) = b.stmts.last() {
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let snippet = self.snippet(mk_sp(
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stmt.span.hi(),
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source!(self, b.span).hi() - brace_compensation,
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));
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let len = CommentCodeSlices::new(snippet)
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.last()
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.and_then(|(kind, _, s)| {
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if kind == CodeCharKind::Normal && s.trim().is_empty() {
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Some(s.len())
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} else {
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None
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}
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});
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if let Some(len) = len {
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remove_len = BytePos::from_usize(len);
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}
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}
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let unindent_comment = (self.is_if_else_block && !b.stmts.is_empty()) && {
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let end_pos = source!(self, b.span).hi() - brace_compensation - remove_len;
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let snippet = self.snippet(mk_sp(self.last_pos, end_pos));
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snippet.contains("//") || snippet.contains("/*")
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};
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// FIXME: we should compress any newlines here to just one
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if unindent_comment {
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self.block_indent = self.block_indent.block_unindent(self.config);
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}
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self.format_missing_with_indent(
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source!(self, b.span).hi() - brace_compensation - remove_len,
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);
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if unindent_comment {
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self.block_indent = self.block_indent.block_indent(self.config);
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}
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self.close_block(unindent_comment);
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self.last_pos = source!(self, b.span).hi();
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}
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// FIXME: this is a terrible hack to indent the comments between the last
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// item in the block and the closing brace to the block's level.
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// The closing brace itself, however, should be indented at a shallower
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// level.
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fn close_block(&mut self, unindent_comment: bool) {
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let total_len = self.buffer.len();
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let chars_too_many = if unindent_comment {
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0
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} else if self.config.hard_tabs() {
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1
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} else {
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self.config.tab_spaces()
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};
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self.buffer.truncate(total_len - chars_too_many);
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self.push_str("}");
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self.block_indent = self.block_indent.block_unindent(self.config);
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}
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// Note that this only gets called for function definitions. Required methods
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// on traits do not get handled here.
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fn visit_fn(
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&mut self,
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fk: visit::FnKind,
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generics: &ast::Generics,
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fd: &ast::FnDecl,
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s: Span,
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defaultness: ast::Defaultness,
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inner_attrs: Option<&[ast::Attribute]>,
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) {
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let indent = self.block_indent;
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let block;
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let rewrite = match fk {
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visit::FnKind::ItemFn(ident, _, _, _, _, b) | visit::FnKind::Method(ident, _, _, b) => {
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block = b;
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self.rewrite_fn(
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indent,
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ident,
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&FnSig::from_fn_kind(&fk, generics, fd, defaultness),
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mk_sp(s.lo(), b.span.lo()),
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b,
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inner_attrs,
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)
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}
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visit::FnKind::Closure(_) => unreachable!(),
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};
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if let Some(fn_str) = rewrite {
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self.format_missing_with_indent(source!(self, s).lo());
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self.push_str(&fn_str);
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if let Some(c) = fn_str.chars().last() {
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if c == '}' {
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self.last_pos = source!(self, block.span).hi();
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return;
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}
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}
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} else {
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self.format_missing(source!(self, block.span).lo());
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}
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self.last_pos = source!(self, block.span).lo();
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self.visit_block(block, inner_attrs, true)
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}
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pub fn visit_item(&mut self, item: &ast::Item) {
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skip_out_of_file_lines_range_visitor!(self, item.span);
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// This is where we bail out if there is a skip attribute. This is only
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// complex in the module case. It is complex because the module could be
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// in a separate file and there might be attributes in both files, but
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// the AST lumps them all together.
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let filtered_attrs;
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let mut attrs = &item.attrs;
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match item.node {
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// For use items, skip rewriting attributes. Just check for a skip attribute.
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ast::ItemKind::Use(..) => {
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if contains_skip(attrs) {
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self.push_skipped_with_span(item.span());
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return;
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}
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}
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// Module is inline, in this case we treat it like any other item.
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_ if !is_mod_decl(item) => {
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if self.visit_attrs(&item.attrs, ast::AttrStyle::Outer) {
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self.push_skipped_with_span(item.span());
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return;
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}
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}
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// Module is not inline, but should be skipped.
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ast::ItemKind::Mod(..) if contains_skip(&item.attrs) => {
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return;
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}
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// Module is not inline and should not be skipped. We want
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// to process only the attributes in the current file.
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ast::ItemKind::Mod(..) => {
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filtered_attrs = filter_inline_attrs(&item.attrs, item.span());
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// Assert because if we should skip it should be caught by
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// the above case.
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assert!(!self.visit_attrs(&filtered_attrs, ast::AttrStyle::Outer));
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attrs = &filtered_attrs;
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}
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_ => {
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if self.visit_attrs(&item.attrs, ast::AttrStyle::Outer) {
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self.push_skipped_with_span(item.span());
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return;
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}
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}
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}
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match item.node {
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ast::ItemKind::Use(ref tree) => self.format_import(item, tree),
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ast::ItemKind::Impl(..) => {
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let snippet = self.snippet(item.span);
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let where_span_end = snippet
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.find_uncommented("{")
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.map(|x| BytePos(x as u32) + source!(self, item.span).lo());
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let rw = format_impl(&self.get_context(), item, self.block_indent, where_span_end);
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self.push_rewrite(item.span, rw);
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}
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ast::ItemKind::Trait(..) => {
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let rw = format_trait(&self.get_context(), item, self.block_indent);
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self.push_rewrite(item.span, rw);
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}
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ast::ItemKind::TraitAlias(ref generics, ref ty_param_bounds) => {
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let shape = Shape::indented(self.block_indent, self.config);
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let rw = format_trait_alias(
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&self.get_context(),
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item.ident,
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generics,
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ty_param_bounds,
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shape,
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);
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self.push_rewrite(item.span, rw);
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}
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ast::ItemKind::ExternCrate(_) => {
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let rw = rewrite_extern_crate(&self.get_context(), item);
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self.push_rewrite(item.span, rw);
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}
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ast::ItemKind::Struct(..) | ast::ItemKind::Union(..) => {
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self.visit_struct(&StructParts::from_item(item));
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}
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ast::ItemKind::Enum(ref def, ref generics) => {
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self.format_missing_with_indent(source!(self, item.span).lo());
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self.visit_enum(item.ident, &item.vis, def, generics, item.span);
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self.last_pos = source!(self, item.span).hi();
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}
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ast::ItemKind::Mod(ref module) => {
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let is_inline = !is_mod_decl(item);
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self.format_missing_with_indent(source!(self, item.span).lo());
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self.format_mod(module, &item.vis, item.span, item.ident, attrs, is_inline);
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}
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ast::ItemKind::Mac(ref mac) => {
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self.visit_mac(mac, Some(item.ident), MacroPosition::Item);
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}
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ast::ItemKind::ForeignMod(ref foreign_mod) => {
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self.format_missing_with_indent(source!(self, item.span).lo());
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self.format_foreign_mod(foreign_mod, item.span);
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}
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ast::ItemKind::Static(..) | ast::ItemKind::Const(..) => {
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self.visit_static(&StaticParts::from_item(item));
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}
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ast::ItemKind::Fn(ref decl, unsafety, constness, abi, ref generics, ref body) => {
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let inner_attrs = inner_attributes(&item.attrs);
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self.visit_fn(
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visit::FnKind::ItemFn(item.ident, unsafety, constness, abi, &item.vis, body),
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generics,
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decl,
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item.span,
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ast::Defaultness::Final,
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Some(&inner_attrs),
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)
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}
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ast::ItemKind::Ty(ref ty, ref generics) => {
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let rewrite = rewrite_type_alias(
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&self.get_context(),
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self.block_indent,
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item.ident,
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ty,
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generics,
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&item.vis,
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item.span,
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);
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self.push_rewrite(item.span, rewrite);
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}
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ast::ItemKind::GlobalAsm(..) => {
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let snippet = Some(self.snippet(item.span).to_owned());
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self.push_rewrite(item.span, snippet);
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}
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ast::ItemKind::MacroDef(ref def) => {
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let rewrite = rewrite_macro_def(
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&self.get_context(),
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self.shape(),
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self.block_indent,
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def,
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item.ident,
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&item.vis,
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item.span,
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);
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self.push_rewrite(item.span, rewrite);
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}
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}
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}
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pub fn visit_trait_item(&mut self, ti: &ast::TraitItem) {
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skip_out_of_file_lines_range_visitor!(self, ti.span);
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if self.visit_attrs(&ti.attrs, ast::AttrStyle::Outer) {
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self.push_skipped_with_span(ti.span());
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return;
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}
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match ti.node {
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ast::TraitItemKind::Const(..) => self.visit_static(&StaticParts::from_trait_item(ti)),
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ast::TraitItemKind::Method(ref sig, None) => {
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let indent = self.block_indent;
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let rewrite =
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self.rewrite_required_fn(indent, ti.ident, sig, &ti.generics, ti.span);
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self.push_rewrite(ti.span, rewrite);
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}
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ast::TraitItemKind::Method(ref sig, Some(ref body)) => {
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let inner_attrs = inner_attributes(&ti.attrs);
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self.visit_fn(
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visit::FnKind::Method(ti.ident, sig, None, body),
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&ti.generics,
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&sig.decl,
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ti.span,
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ast::Defaultness::Final,
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Some(&inner_attrs),
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);
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}
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ast::TraitItemKind::Type(ref type_param_bounds, ref type_default) => {
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let rewrite = rewrite_associated_type(
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ti.ident,
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type_default.as_ref(),
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Some(type_param_bounds),
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&self.get_context(),
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self.block_indent,
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);
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self.push_rewrite(ti.span, rewrite);
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}
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ast::TraitItemKind::Macro(ref mac) => {
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self.visit_mac(mac, Some(ti.ident), MacroPosition::Item);
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}
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}
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}
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pub fn visit_impl_item(&mut self, ii: &ast::ImplItem) {
|
|
skip_out_of_file_lines_range_visitor!(self, ii.span);
|
|
|
|
if self.visit_attrs(&ii.attrs, ast::AttrStyle::Outer) {
|
|
self.push_skipped_with_span(ii.span());
|
|
return;
|
|
}
|
|
|
|
match ii.node {
|
|
ast::ImplItemKind::Method(ref sig, ref body) => {
|
|
let inner_attrs = inner_attributes(&ii.attrs);
|
|
self.visit_fn(
|
|
visit::FnKind::Method(ii.ident, sig, Some(&ii.vis), body),
|
|
&ii.generics,
|
|
&sig.decl,
|
|
ii.span,
|
|
ii.defaultness,
|
|
Some(&inner_attrs),
|
|
);
|
|
}
|
|
ast::ImplItemKind::Const(..) => self.visit_static(&StaticParts::from_impl_item(ii)),
|
|
ast::ImplItemKind::Type(ref ty) => {
|
|
let rewrite = rewrite_associated_impl_type(
|
|
ii.ident,
|
|
ii.defaultness,
|
|
Some(ty),
|
|
None,
|
|
&self.get_context(),
|
|
self.block_indent,
|
|
);
|
|
self.push_rewrite(ii.span, rewrite);
|
|
}
|
|
ast::ImplItemKind::Macro(ref mac) => {
|
|
self.visit_mac(mac, Some(ii.ident), MacroPosition::Item);
|
|
}
|
|
}
|
|
}
|
|
|
|
fn visit_mac(&mut self, mac: &ast::Mac, ident: Option<ast::Ident>, pos: MacroPosition) {
|
|
skip_out_of_file_lines_range_visitor!(self, mac.span);
|
|
|
|
// 1 = ;
|
|
let shape = self.shape().sub_width(1).unwrap();
|
|
let rewrite = self.with_context(|ctx| rewrite_macro(mac, ident, ctx, shape, pos));
|
|
self.push_rewrite(mac.span, rewrite);
|
|
}
|
|
|
|
pub fn push_str(&mut self, s: &str) {
|
|
self.line_number += count_newlines(s);
|
|
self.buffer.push_str(s);
|
|
}
|
|
|
|
#[cfg_attr(feature = "cargo-clippy", allow(needless_pass_by_value))]
|
|
fn push_rewrite_inner(&mut self, span: Span, rewrite: Option<String>) {
|
|
if let Some(ref s) = rewrite {
|
|
self.push_str(s);
|
|
} else {
|
|
let snippet = self.snippet(span);
|
|
self.push_str(snippet);
|
|
}
|
|
self.last_pos = source!(self, span).hi();
|
|
}
|
|
|
|
pub fn push_rewrite(&mut self, span: Span, rewrite: Option<String>) {
|
|
self.format_missing_with_indent(source!(self, span).lo());
|
|
self.push_rewrite_inner(span, rewrite);
|
|
}
|
|
|
|
pub fn push_skipped_with_span(&mut self, span: Span) {
|
|
self.format_missing_with_indent(source!(self, span).lo());
|
|
let lo = self.line_number + 1;
|
|
self.push_rewrite_inner(span, None);
|
|
let hi = self.line_number + 1;
|
|
self.skipped_range.push((lo, hi));
|
|
}
|
|
|
|
pub fn from_context(ctx: &'a RewriteContext) -> FmtVisitor<'a> {
|
|
FmtVisitor::from_codemap(
|
|
ctx.parse_session,
|
|
ctx.config,
|
|
ctx.snippet_provider,
|
|
ctx.report.clone(),
|
|
)
|
|
}
|
|
|
|
pub(crate) fn from_codemap(
|
|
parse_session: &'a ParseSess,
|
|
config: &'a Config,
|
|
snippet_provider: &'a SnippetProvider,
|
|
report: FormatReport,
|
|
) -> FmtVisitor<'a> {
|
|
FmtVisitor {
|
|
parse_session,
|
|
codemap: parse_session.codemap(),
|
|
buffer: String::with_capacity(snippet_provider.big_snippet.len() * 2),
|
|
last_pos: BytePos(0),
|
|
block_indent: Indent::empty(),
|
|
config,
|
|
is_if_else_block: false,
|
|
snippet_provider,
|
|
line_number: 0,
|
|
skipped_range: vec![],
|
|
macro_rewrite_failure: false,
|
|
report,
|
|
}
|
|
}
|
|
|
|
pub fn opt_snippet(&'b self, span: Span) -> Option<&'a str> {
|
|
self.snippet_provider.span_to_snippet(span)
|
|
}
|
|
|
|
pub fn snippet(&'b self, span: Span) -> &'a str {
|
|
self.opt_snippet(span).unwrap()
|
|
}
|
|
|
|
// Returns true if we should skip the following item.
|
|
pub fn visit_attrs(&mut self, attrs: &[ast::Attribute], style: ast::AttrStyle) -> bool {
|
|
for attr in attrs {
|
|
if attr.name() == DEPR_SKIP_ANNOTATION {
|
|
let file_name = self.codemap.span_to_filename(attr.span).into();
|
|
self.report.append(
|
|
file_name,
|
|
vec![FormattingError::from_span(
|
|
&attr.span,
|
|
&self.codemap,
|
|
ErrorKind::DeprecatedAttr,
|
|
)],
|
|
);
|
|
} else if attr.path.segments[0].ident.to_string() == "rustfmt" {
|
|
if attr.path.segments.len() == 1
|
|
|| attr.path.segments[1].ident.to_string() != "skip"
|
|
{
|
|
let file_name = self.codemap.span_to_filename(attr.span).into();
|
|
self.report.append(
|
|
file_name,
|
|
vec![FormattingError::from_span(
|
|
&attr.span,
|
|
&self.codemap,
|
|
ErrorKind::BadAttr,
|
|
)],
|
|
);
|
|
}
|
|
}
|
|
}
|
|
if contains_skip(attrs) {
|
|
return true;
|
|
}
|
|
|
|
let attrs: Vec<_> = attrs.iter().filter(|a| a.style == style).cloned().collect();
|
|
if attrs.is_empty() {
|
|
return false;
|
|
}
|
|
|
|
let rewrite = attrs.rewrite(&self.get_context(), self.shape());
|
|
let span = mk_sp(attrs[0].span.lo(), attrs[attrs.len() - 1].span.hi());
|
|
self.push_rewrite(span, rewrite);
|
|
|
|
false
|
|
}
|
|
|
|
fn walk_mod_items(&mut self, m: &ast::Mod) {
|
|
self.visit_items_with_reordering(&ptr_vec_to_ref_vec(&m.items));
|
|
}
|
|
|
|
fn walk_stmts(&mut self, stmts: &[ast::Stmt]) {
|
|
fn to_stmt_item(stmt: &ast::Stmt) -> Option<&ast::Item> {
|
|
match stmt.node {
|
|
ast::StmtKind::Item(ref item) => Some(&**item),
|
|
_ => None,
|
|
}
|
|
}
|
|
|
|
if stmts.is_empty() {
|
|
return;
|
|
}
|
|
|
|
// Extract leading `use ...;`.
|
|
let items: Vec<_> = stmts
|
|
.iter()
|
|
.take_while(|stmt| to_stmt_item(stmt).map_or(false, is_use_item))
|
|
.filter_map(|stmt| to_stmt_item(stmt))
|
|
.collect();
|
|
|
|
if items.is_empty() {
|
|
self.visit_stmt(&stmts[0]);
|
|
self.walk_stmts(&stmts[1..]);
|
|
} else {
|
|
self.visit_items_with_reordering(&items);
|
|
self.walk_stmts(&stmts[items.len()..]);
|
|
}
|
|
}
|
|
|
|
fn walk_block_stmts(&mut self, b: &ast::Block) {
|
|
self.walk_stmts(&b.stmts)
|
|
}
|
|
|
|
fn format_mod(
|
|
&mut self,
|
|
m: &ast::Mod,
|
|
vis: &ast::Visibility,
|
|
s: Span,
|
|
ident: ast::Ident,
|
|
attrs: &[ast::Attribute],
|
|
is_internal: bool,
|
|
) {
|
|
self.push_str(&*utils::format_visibility(vis));
|
|
self.push_str("mod ");
|
|
self.push_str(&ident.to_string());
|
|
|
|
if is_internal {
|
|
match self.config.brace_style() {
|
|
BraceStyle::AlwaysNextLine => {
|
|
let indent_str = self.block_indent.to_string_with_newline(self.config);
|
|
self.push_str(&indent_str);
|
|
self.push_str("{");
|
|
}
|
|
_ => self.push_str(" {"),
|
|
}
|
|
// Hackery to account for the closing }.
|
|
let mod_lo = self.snippet_provider.span_after(source!(self, s), "{");
|
|
let body_snippet =
|
|
self.snippet(mk_sp(mod_lo, source!(self, m.inner).hi() - BytePos(1)));
|
|
let body_snippet = body_snippet.trim();
|
|
if body_snippet.is_empty() {
|
|
self.push_str("}");
|
|
} else {
|
|
self.last_pos = mod_lo;
|
|
self.block_indent = self.block_indent.block_indent(self.config);
|
|
self.visit_attrs(attrs, ast::AttrStyle::Inner);
|
|
self.walk_mod_items(m);
|
|
self.format_missing_with_indent(source!(self, m.inner).hi() - BytePos(1));
|
|
self.close_block(false);
|
|
}
|
|
self.last_pos = source!(self, m.inner).hi();
|
|
} else {
|
|
self.push_str(";");
|
|
self.last_pos = source!(self, s).hi();
|
|
}
|
|
}
|
|
|
|
pub fn format_separate_mod(&mut self, m: &ast::Mod, filemap: &codemap::FileMap) {
|
|
self.block_indent = Indent::empty();
|
|
self.walk_mod_items(m);
|
|
self.format_missing_with_indent(filemap.end_pos);
|
|
}
|
|
|
|
pub fn skip_empty_lines(&mut self, end_pos: BytePos) {
|
|
while let Some(pos) = self
|
|
.snippet_provider
|
|
.opt_span_after(mk_sp(self.last_pos, end_pos), "\n")
|
|
{
|
|
if let Some(snippet) = self.opt_snippet(mk_sp(self.last_pos, pos)) {
|
|
if snippet.trim().is_empty() {
|
|
self.last_pos = pos;
|
|
} else {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn with_context<F>(&mut self, f: F) -> Option<String>
|
|
where
|
|
F: Fn(&RewriteContext) -> Option<String>,
|
|
{
|
|
let result;
|
|
let macro_rewrite_failure = {
|
|
let context = self.get_context();
|
|
result = f(&context);
|
|
unsafe { *context.macro_rewrite_failure.as_ptr() }
|
|
};
|
|
self.macro_rewrite_failure |= macro_rewrite_failure;
|
|
result
|
|
}
|
|
|
|
pub fn get_context(&self) -> RewriteContext {
|
|
RewriteContext {
|
|
parse_session: self.parse_session,
|
|
codemap: self.codemap,
|
|
config: self.config,
|
|
inside_macro: RefCell::new(false),
|
|
use_block: RefCell::new(false),
|
|
is_if_else_block: RefCell::new(false),
|
|
force_one_line_chain: RefCell::new(false),
|
|
snippet_provider: self.snippet_provider,
|
|
macro_rewrite_failure: RefCell::new(false),
|
|
report: self.report.clone(),
|
|
}
|
|
}
|
|
}
|