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Speed up ast.tokenLocation

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frmdstryr 2023-11-08 20:45:25 -05:00 committed by GitHub
parent 2ac0ba03a6
commit f258a391da
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1 changed files with 14 additions and 3 deletions
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17
lib/std/zig/Ast.zig
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@ -140,9 +140,20 @@ pub fn tokenLocation(self: Ast, start_offset: ByteOffset, token_index: TokenInde
.line_end = self.source.len,
};
const token_start = self.tokens.items(.start)[token_index];
for (self.source[start_offset..], 0..) |c, i| {
if (i + start_offset == token_start) {
loc.line_end = i + start_offset;
// Scan to by line until we go past the token start
while (std.mem.indexOfScalarPos(u8, self.source, loc.line_start, '\n')) |i| {
if (i >= token_start) {
break; // Went past
}
loc.line += 1;
loc.line_start = i + 1;
}
const offset = loc.line_start;
for (self.source[offset..], 0..) |c, i| {
if (i + offset == token_start) {
loc.line_end = i + offset;
while (loc.line_end < self.source.len and self.source[loc.line_end] != '\n') {
loc.line_end += 1;
}