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| author | Nirmal Patel <nirmal@nirmal.dev> | 2022-06-12 19:23:30 -0400 |
|---|---|---|
| committer | Nirmal Patel <nirmal@nirmal.dev> | 2022-06-12 19:23:30 -0400 |
| commit | 11493cccd7e7fc5ea31e37581323f85eca58ca0c (patch) | |
| tree | f4d27ee7d37d619511ef1510379d36d320f0ca2a | |
| parent | e6d32d59f1e6524df667262c509910e44151bbf2 (diff) | |
| download | gcc-11493cccd7e7fc5ea31e37581323f85eca58ca0c.zip gcc-11493cccd7e7fc5ea31e37581323f85eca58ca0c.tar.gz gcc-11493cccd7e7fc5ea31e37581323f85eca58ca0c.tar.bz2 | |
Fix lexing of empty comments continuing till next line
Empty comments (comments without any characters including spaces after
//) had a bug during lexing. The lexer did not recheck the current
character after skipping / characters. When there was no character after
//, the lexer skipped the next newline character. This caused lexer to
count the next line as a part of the comment to. This commit fixes this
bug by rechecking current character after skipping two / characters.
Signed-off-by: Nirmal Patel <nirmal@nirmal.dev>
| -rw-r--r-- | gcc/rust/lex/rust-lex.cc | 1 | ||||
| -rw-r--r-- | gcc/testsuite/rust/compile/empty_comment_before_match.rs | 7 |
2 files changed, 8 insertions, 0 deletions
diff --git a/gcc/rust/lex/rust-lex.cc b/gcc/rust/lex/rust-lex.cc index 023b676..9e0595b 100644 --- a/gcc/rust/lex/rust-lex.cc +++ b/gcc/rust/lex/rust-lex.cc @@ -489,6 +489,7 @@ Lexer::build_token () // (but not an inner or outer doc comment) skip_input (); current_column += 2; + current_char = peek_input (); // basically ignore until line finishes while (current_char != '\n' && current_char != EOF) diff --git a/gcc/testsuite/rust/compile/empty_comment_before_match.rs b/gcc/testsuite/rust/compile/empty_comment_before_match.rs new file mode 100644 index 0000000..3d344d3 --- /dev/null +++ b/gcc/testsuite/rust/compile/empty_comment_before_match.rs @@ -0,0 +1,7 @@ +fn foo (x: i8) -> i32 { // { dg-warning "function is never used" } + // + match x { + 1 => { return 1; } + _ => { return 0; } + } +} |