diff options
Diffstat (limited to 'src/libsyntax/source_map.rs')
| -rw-r--r-- | src/libsyntax/source_map.rs | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/src/libsyntax/source_map.rs b/src/libsyntax/source_map.rs index 95839f94b9e..7ee58350621 100644 --- a/src/libsyntax/source_map.rs +++ b/src/libsyntax/source_map.rs @@ -251,17 +251,18 @@ impl SourceMap { /// 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_source_file(&self, - filename: FileName, - name_was_remapped: bool, - crate_of_origin: u32, - src_hash: u128, - name_hash: u128, - source_len: usize, - mut file_local_lines: Vec<BytePos>, - mut file_local_multibyte_chars: Vec<MultiByteChar>, - mut file_local_non_narrow_chars: Vec<NonNarrowChar>) - -> Lrc<SourceFile> { + pub fn new_imported_source_file( + &self, + filename: FileName, + name_was_remapped: bool, + crate_of_origin: u32, + src_hash: u128, + name_hash: u128, + source_len: usize, + mut file_local_lines: Vec<BytePos>, + mut file_local_multibyte_chars: Vec<MultiByteChar>, + mut file_local_non_narrow_chars: Vec<NonNarrowChar>, + ) -> Lrc<SourceFile> { let start_pos = self.next_start_pos(); let end_pos = Pos::from_usize(start_pos + source_len); @@ -578,6 +579,15 @@ impl SourceMap { .to_string()) } + pub fn span_to_margin(&self, sp: Span) -> Option<usize> { + match self.span_to_prev_source(sp) { + Err(_) => None, + Ok(source) => source.split('\n').last().map(|last_line| { + last_line.len() - last_line.trim_left().len() + }) + } + } + /// Return the source snippet as `String` before the given `Span` pub fn span_to_prev_source(&self, sp: Span) -> Result<String, SpanSnippetError> { self.span_to_source(sp, |src, start_index, _| src[..start_index].to_string()) |