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Parser: Recover from using colon as path separator in imports
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@ -971,6 +971,23 @@ impl<'a> Parser<'a> {
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if self.eat(&token::ModSep) {
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self.parse_use_tree_glob_or_nested()?
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} else {
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// Recover from using a colon as path separator.
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while self.eat_noexpect(&token::Colon) {
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self.struct_span_err(self.prev_token.span, "expected `::`, found `:`")
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.span_suggestion_short(
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self.prev_token.span,
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"use double colon",
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"::",
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Applicability::MachineApplicable,
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)
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.note_once("import paths are delimited using `::`")
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.emit();
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// We parse the rest of the path and append it to the original prefix.
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self.parse_path_segments(&mut prefix.segments, PathStyle::Mod, None)?;
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prefix.span = lo.to(self.prev_token.span);
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}
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UseTreeKind::Simple(self.parse_rename()?, DUMMY_NODE_ID, DUMMY_NODE_ID)
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}
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};
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11
src/test/ui/parser/use-colon-as-mod-sep.rs
Normal file
11
src/test/ui/parser/use-colon-as-mod-sep.rs
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@ -0,0 +1,11 @@
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// Recover from using a colon as a path separator.
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use std::process:Command;
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//~^ ERROR expected `::`, found `:`
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use std:fs::File;
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//~^ ERROR expected `::`, found `:`
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use std:collections:HashMap;
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//~^ ERROR expected `::`, found `:`
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//~| ERROR expected `::`, found `:`
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fn main() { }
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28
src/test/ui/parser/use-colon-as-mod-sep.stderr
Normal file
28
src/test/ui/parser/use-colon-as-mod-sep.stderr
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@ -0,0 +1,28 @@
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error: expected `::`, found `:`
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--> $DIR/use-colon-as-mod-sep.rs:3:17
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LL | use std::process:Command;
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| ^ help: use double colon
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= note: import paths are delimited using `::`
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error: expected `::`, found `:`
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--> $DIR/use-colon-as-mod-sep.rs:5:8
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LL | use std:fs::File;
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| ^ help: use double colon
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error: expected `::`, found `:`
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--> $DIR/use-colon-as-mod-sep.rs:7:8
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LL | use std:collections:HashMap;
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| ^ help: use double colon
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error: expected `::`, found `:`
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--> $DIR/use-colon-as-mod-sep.rs:7:20
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LL | use std:collections:HashMap;
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| ^ help: use double colon
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error: aborting due to 4 previous errors
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