3 use syntax::codemap::{BytePos, CodeMap, FileMap, Span};
5 use comment::FindUncommented;
7 /// A range of lines in a file, inclusive of both ends.
15 pub fn file_name(&self) -> &str {
16 self.file.as_ref().name.as_str()
21 fn span_after(&self, original: Span, needle: &str) -> BytePos;
22 fn span_after_last(&self, original: Span, needle: &str) -> BytePos;
23 fn span_before(&self, original: Span, needle: &str) -> BytePos;
26 pub trait LineRangeUtils {
27 /// Returns the `LineRange` that corresponds to `span` in `self`.
31 /// Panics if `span` crosses a file boundary, which shouldn't happen.
32 fn lookup_line_range(&self, span: Span) -> LineRange;
35 impl SpanUtils for CodeMap {
37 fn span_after(&self, original: Span, needle: &str) -> BytePos {
38 let snippet = self.span_to_snippet(original).unwrap();
39 let offset = snippet.find_uncommented(needle).unwrap() + needle.len();
41 original.lo + BytePos(offset as u32)
45 fn span_after_last(&self, original: Span, needle: &str) -> BytePos {
46 let snippet = self.span_to_snippet(original).unwrap();
49 while let Some(additional_offset) = snippet[offset..].find_uncommented(needle) {
50 offset += additional_offset + needle.len();
53 original.lo + BytePos(offset as u32)
57 fn span_before(&self, original: Span, needle: &str) -> BytePos {
58 let snippet = self.span_to_snippet(original).unwrap();
59 let offset = snippet.find_uncommented(needle).unwrap();
61 original.lo + BytePos(offset as u32)
65 impl LineRangeUtils for CodeMap {
66 fn lookup_line_range(&self, span: Span) -> LineRange {
67 let lo = self.lookup_char_pos(span.lo);
68 let hi = self.lookup_char_pos(span.hi);
70 assert!(lo.file.name == hi.file.name,
71 "span crossed file boundary: lo: {:?}, hi: {:?}",
76 file: lo.file.clone(),