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cleanup shebang handling in the lexer

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This commit is contained in:
Aleksey Kladov 2019-04-04 10:55:30 +03:00
parent 546cb21f58
commit fdb8752850
1 changed files with 5 additions and 11 deletions
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16
src/libsyntax/parse/lexer/mod.rs
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@ -1,10 +1,9 @@
use crate::ast::{self, Ident};
use crate::source_map::{SourceMap, FilePathMapping};
use crate::parse::{token, ParseSess};
use crate::symbol::Symbol;
use errors::{Applicability, FatalError, Diagnostic, DiagnosticBuilder};
use syntax_pos::{BytePos, CharPos, Pos, Span, NO_EXPANSION};
use syntax_pos::{BytePos, Pos, Span, NO_EXPANSION};
use core::unicode::property::Pattern_White_Space;
use std::borrow::Cow;
@ -667,14 +666,9 @@ impl<'a> StringReader<'a> {
return None;
}
// I guess this is the only way to figure out if
// we're at the beginning of the file...
let smap = SourceMap::new(FilePathMapping::empty());
smap.files.borrow_mut().source_files.push(self.source_file.clone());
let loc = smap.lookup_char_pos_adj(self.pos);
debug!("Skipping a shebang");
if loc.line == 1 && loc.col == CharPos(0) {
// FIXME: Add shebang "token", return it
let is_beginning_of_file = self.pos == self.source_file.start_pos;
if is_beginning_of_file {
debug!("Skipping a shebang");
let start = self.pos;
while !self.ch_is('\n') && !self.is_eof() {
self.bump();
@ -1911,7 +1905,7 @@ mod tests {
use crate::ast::{Ident, CrateConfig};
use crate::symbol::Symbol;
use crate::source_map::SourceMap;
use crate::source_map::{SourceMap, FilePathMapping};
use crate::feature_gate::UnstableFeatures;
use crate::parse::token;
use crate::diagnostics::plugin::ErrorMap;