1 use crate::source_map::{SourceMap, FilePathMapping};
2 use crate::with_globals;
5 use errors::emitter::EmitterWriter;
8 use std::io::prelude::*;
9 use rustc_data_structures::sync::Lrc;
11 use std::sync::{Arc, Mutex};
13 use syntax_pos::{BytePos, NO_EXPANSION, Span, MultiSpan};
15 /// Identify a position in the text by the Nth occurrence of a string.
27 struct Shared<T: Write> {
31 impl<T: Write> Write for Shared<T> {
32 fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
33 self.data.lock().unwrap().write(buf)
36 fn flush(&mut self) -> io::Result<()> {
37 self.data.lock().unwrap().flush()
41 fn test_harness(file_text: &str, span_labels: Vec<SpanLabel>, expected_output: &str) {
43 let output = Arc::new(Mutex::new(Vec::new()));
45 let source_map = Lrc::new(SourceMap::new(FilePathMapping::empty()));
46 source_map.new_source_file(Path::new("test.rs").to_owned().into(), file_text.to_owned());
48 let primary_span = make_span(&file_text, &span_labels[0].start, &span_labels[0].end);
49 let mut msp = MultiSpan::from_span(primary_span);
50 for span_label in span_labels {
51 let span = make_span(&file_text, &span_label.start, &span_label.end);
52 msp.push_span_label(span, span_label.label.to_string());
53 println!("span: {:?} label: {:?}", span, span_label.label);
54 println!("text: {:?}", source_map.span_to_snippet(span));
57 let emitter = EmitterWriter::new(Box::new(Shared { data: output.clone() }),
58 Some(source_map.clone()),
61 let handler = Handler::with_emitter(true, false, Box::new(emitter));
62 handler.span_err(msp, "foo");
64 assert!(expected_output.chars().next() == Some('\n'),
65 "expected output should begin with newline");
66 let expected_output = &expected_output[1..];
68 let bytes = output.lock().unwrap();
69 let actual_output = str::from_utf8(&bytes).unwrap();
70 println!("expected output:\n------\n{}------", expected_output);
71 println!("actual output:\n------\n{}------", actual_output);
73 assert!(expected_output == actual_output)
77 fn make_span(file_text: &str, start: &Position, end: &Position) -> Span {
78 let start = make_pos(file_text, start);
79 let end = make_pos(file_text, end) + end.string.len(); // just after matching thing ends
80 assert!(start <= end);
81 Span::new(BytePos(start as u32), BytePos(end as u32), NO_EXPANSION)
84 fn make_pos(file_text: &str, pos: &Position) -> usize {
85 let mut remainder = file_text;
87 for _ in 0..pos.count {
88 if let Some(n) = remainder.find(&pos.string) {
90 remainder = &remainder[n + 1..];
92 panic!("failed to find {} instances of {:?} in {:?}",
185 label: "`X` is a good letter",
196 label: "`Y` is a good letter too",
209 | ||____^__- `Y` is a good letter too
211 | `X` is a good letter
234 label: "`X` is a good letter",
245 label: "`Y` is a good letter too",
257 | ||____-__^ `X` is a good letter
259 | `Y` is a good letter too
265 fn different_overlap() {
284 label: "`X` is a good letter",
295 label: "`Y` is a good letter too",
307 | ||____^ `X` is a good letter
309 | |_____- `Y` is a good letter too
315 fn triple_overlap() {
333 label: "`X` is a good letter",
344 label: "`Y` is a good letter too",
369 | |||____^__-__- `Z` label
371 | |____| `Y` is a good letter too
372 | `X` is a good letter
397 label: "`X` is a good letter",
408 label: "`Y` is a good letter too",
431 | | `X` is a good letter
433 | |____-______- `Y` is a good letter too
443 fn non_overlaping() {
462 label: "`X` is a good letter",
473 label: "`Y` is a good letter too",
482 | |____^ `X` is a good letter
486 | |__________- `Y` is a good letter too
492 fn overlaping_start_and_end() {
511 label: "`X` is a good letter",
522 label: "`Y` is a good letter too",
534 | | `X` is a good letter
537 | |___________- `Y` is a good letter too
543 fn multiple_labels_primary_without_message() {
570 label: "`a` is a good letter",
589 | ----^^^^-^^-- `a` is a good letter
595 fn multiple_labels_secondary_without_message() {
611 label: "`a` is a good letter",
630 | ^^^^-------^^ `a` is a good letter
636 fn multiple_labels_primary_without_message_2() {
652 label: "`b` is a good letter",
684 | `b` is a good letter
690 fn multiple_labels_secondary_without_message_2() {
717 label: "`b` is a good letter",
727 | `b` is a good letter
733 fn multiple_labels_secondary_without_message_3() {
749 label: "`a` is a good letter",
770 | `a` is a good letter
776 fn multiple_labels_without_message() {
817 fn multiple_labels_without_message_2() {
869 fn multiple_labels_with_message() {
885 label: "`a` is a good letter",
896 label: "`b` is a good letter",
906 | | `b` is a good letter
907 | `a` is a good letter
913 fn single_label_with_message() {
929 label: "`a` is a good letter",
937 | ^^^^^^^^^^^^^ `a` is a good letter
943 fn single_label_without_message() {
1002 label: "`X` is a good letter",
1013 label: "`Y` is a good letter too",
1025 | | `X` is a good letter
1032 | |___________- `Y` is a good letter too
1038 fn long_snippet_multiple_spans() {
1067 label: "`Y` is a good letter",
1078 label: "`Z` is a good letter too",
1096 | ||__________- `Z` is a good letter too
1100 | |_______^ `Y` is a good letter