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-rw-r--r--compiler/rustc_save_analysis/src/span_utils.rs96
1 files changed, 0 insertions, 96 deletions
diff --git a/compiler/rustc_save_analysis/src/span_utils.rs b/compiler/rustc_save_analysis/src/span_utils.rs
deleted file mode 100644
index e65d57bb3..000000000
--- a/compiler/rustc_save_analysis/src/span_utils.rs
+++ /dev/null
@@ -1,96 +0,0 @@
-use crate::generated_code;
-use rustc_data_structures::sync::Lrc;
-use rustc_lexer::{tokenize, TokenKind};
-use rustc_session::Session;
-use rustc_span::*;
-
-#[derive(Clone)]
-pub struct SpanUtils<'a> {
- pub sess: &'a Session,
-}
-
-impl<'a> SpanUtils<'a> {
- pub fn new(sess: &'a Session) -> SpanUtils<'a> {
- SpanUtils { sess }
- }
-
- pub fn make_filename_string(&self, file: &SourceFile) -> String {
- match &file.name {
- FileName::Real(RealFileName::LocalPath(path)) => {
- if path.is_absolute() {
- self.sess.source_map().path_mapping().map_prefix(path).0.display().to_string()
- } else {
- self.sess
- .opts
- .working_dir
- .remapped_path_if_available()
- .join(&path)
- .display()
- .to_string()
- }
- }
- filename => filename.prefer_remapped().to_string(),
- }
- }
-
- pub fn snippet(&self, span: Span) -> String {
- match self.sess.source_map().span_to_snippet(span) {
- Ok(s) => s,
- Err(_) => String::new(),
- }
- }
-
- /// Finds the span of `*` token withing the larger `span`.
- pub fn sub_span_of_star(&self, mut span: Span) -> Option<Span> {
- let begin = self.sess.source_map().lookup_byte_offset(span.lo());
- let end = self.sess.source_map().lookup_byte_offset(span.hi());
- // Make the range zero-length if the span is invalid.
- if begin.sf.start_pos != end.sf.start_pos {
- span = span.shrink_to_lo();
- }
-
- let sf = Lrc::clone(&begin.sf);
-
- self.sess.source_map().ensure_source_file_source_present(Lrc::clone(&sf));
- let src =
- sf.src.clone().or_else(|| sf.external_src.borrow().get_source().map(Lrc::clone))?;
- let to_index = |pos: BytePos| -> usize { (pos - sf.start_pos).0 as usize };
- let text = &src[to_index(span.lo())..to_index(span.hi())];
- let start_pos = {
- let mut pos = 0;
- tokenize(text)
- .map(|token| {
- let start = pos;
- pos += token.len;
- (start, token)
- })
- .find(|(_pos, token)| token.kind == TokenKind::Star)?
- .0
- };
- let lo = span.lo() + BytePos(start_pos as u32);
- let hi = lo + BytePos(1);
- Some(span.with_lo(lo).with_hi(hi))
- }
-
- /// Return true if the span is generated code, and
- /// it is not a subspan of the root callsite.
- ///
- /// Used to filter out spans of minimal value,
- /// such as references to macro internal variables.
- pub fn filter_generated(&self, span: Span) -> bool {
- if generated_code(span) {
- return true;
- }
-
- //If the span comes from a fake source_file, filter it.
- !self.sess.source_map().lookup_char_pos(span.lo()).file.is_real_file()
- }
-}
-
-macro_rules! filter {
- ($util: expr, $parent: expr) => {
- if $util.filter_generated($parent) {
- return None;
- }
- };
-}