Commit fb2569461182d62d297a69b1388c8328b9a56932 | zig

author	Isaac Freund <mail@isaacfreund.com> 2026-06-15 12:23:40+02:00
committer	Isaac Freund <mail@isaacfreund.com> 2026-07-08 11:48:58+02:00
log	fb2569461182d62d297a69b1388c8328b9a56932
tree	27b20953db25face56d405b6627aac76ca344f6a
parent	9303d4be1029dc42845aafeff38c811a08ac29b0
signature	Commit is signed but in an unrecognized format.

grammar: fix doc comment parsing

/// should not be parsed as a division operator followed by a comment
if it appears in a context where a division operator is accepted.

Add the missing negative lookahead to the SLASH token.

3 files changed, 6 insertions(+), 1 deletions(-)

doc
- langref
  - grammar.peg
lib
- std
  - zig
    parser_fuzz.zig
    parser_generated_oracle.zig

doc/langref/grammar.peg+1-1

...	...	@@ -537,7 +537,7 @@ RBRACE <- skip '}'
537	537	RBRACKET <- skip ']'
538	538	RPAREN <- skip ')'
539	539	SEMICOLON <- skip ';'
540		SLASH <- skip '/' ![=]
	540	SLASH <- skip '/' ![=/]
541	541	SLASHEQUAL <- skip '/='
542	542	TILDE <- skip '~'
543	543

lib/std/zig/parser_fuzz.zig+4

...	...	@@ -25,6 +25,10 @@ test "operator whitespace" {
25	25	\\}
26	26	);
27	27	}
	28	// Found using AFL++
	29	test "doc comment or division operator" {
	30	try checkAgainstOracle("0=0///\n0");
	31	}
28	32
29	33	fn checkAgainstOracle(source: [:0]const u8) !void {
30	34	var fba_buf: [1 << 18]u8 = undefined;

lib/std/zig/parser_generated_oracle.zig+1

...	...	@@ -3927,6 +3927,7 @@ const Parser = struct {
3927	3927	const pos_1 = p.i;
3928	3928	const match_1 = (p.i < p.source.len and switch (p.source[p.i]) {
3929	3929	'='...'=',
	3930	'/'...'/',
3930	3931	=> blk_2: {
3931	3932	p.i += 1;
3932	3933	break :blk_2 true;