mirror of
https://github.com/danbulant/oxc
synced 2026-05-24 12:21:58 +00:00
f8e1907c4f
Preparation for #6141
`oxc_regular_expression` can already parse and validate both `/regexp-literal/` and `new RegExp("string-literal")`.
But one thing that is not well-supported was reporting `Span` for the `RegExp("string-literal-with-\\escape")` case.
For example, these two cases produce the same `RegExp` instances in JavaScript:
- `/\d+/`
- `new RegExp("\\d+")`
For now, mainly in `oxc_linter`, the latter case is parsed with `oxc_parser` -> `ast::literal::StringLiteral` AST node -> `value` property.
At this point, escape sequences are resolved(!), `oxc_regular_expression` can handle aligned `&str` as an argument without any problem in both cases.
However, in terms of `Span` representation, these cases should be handled differently because of the `\\` in string literals...
As a result, the parsed AST's `Span` for `new RegExp("string-literal")` is not accurate if it contains escape sequences.
e.g. a01a5dfdaf/crates/oxc_linter/src/snapshots/no_invalid_regexp.snap (L118-L122)
Each time the `\` appears, the subsequent position is shifted. `_` should be placed under `*` in this case.
So... to resolve this issue, we need to implement `string_literal_parser` first, and use them as reading units of `oxc_regular_expression`.
68 lines
2 KiB
Rust
68 lines
2 KiB
Rust
#![allow(clippy::print_stdout)]
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use oxc_allocator::Allocator;
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use oxc_regular_expression::{LiteralParser, Options};
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fn main() {
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let allocator = Allocator::default();
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for (pattern_text, flags_text) in [
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(r"ab", ""),
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(r"abc", "i"),
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(r"abcd", "igv"),
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(r"emo👈🏻ji", "u"),
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(r"ab|c", "i"),
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(r"a|b+|c", "i"),
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(r"a{0}|b{1,2}|c{3,}", "i"),
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(r"(?=a)|(?<=b)|(?!c)|(?<!d)", "i"),
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(r"\n\cM\0\x41\.", ""),
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(r"\n\cM\0\x41\u1234\.", "u"),
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(r"\n\cM\0\x41\u{1f600}\.", "u"),
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(r"a\k<f>x\1c", "u"),
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(r"(cg)(?<n>cg)(?:g)", ""),
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(r"{3}", ""), // Error
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(r"Em🥹j", ""),
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(r"^(?=ab)\b(?!cd)(?<=ef)\B(?<!gh)$", ""),
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(r"^(?<!ab)$", ""),
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(r"a)", ""), // Error
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(r"c]", ""),
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(r"[abc]", ""),
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(r"[|\]]", ""),
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(r"[a&&b]", "v"),
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(r"[a--b]", "v"),
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(r"[a&&&]", "v"), // Error
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(r"[a---]", "v"), // Error
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(r"[^a--b--c]", "v"),
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(r"[a[b[c[d[e[f[g[h[i[j[k[l]]]]]]]]]]]]", "v"),
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(r"[\q{abc|d|e|}]", "v"),
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(r"\p{Basic_Emoji}", "v"),
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(r"\p{Basic_Emoji}", "u"), // Error
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(r"[[^\q{}]]", "v"), // Error
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(r"(?<a>)(?<a>)", ""), // Error
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(r"(?noname)", "v"), // Error
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(r"[\bb]", ""),
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(r"a{2,1}", "v"), // Error
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] {
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let parser = LiteralParser::new(
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&allocator,
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pattern_text,
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Some(flags_text),
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// +1 for added `/` in error reports
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Options { pattern_span_offset: 1, ..Options::default() },
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);
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let ret = parser.parse();
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let literal = format!("/{pattern_text}/{flags_text}");
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println!("Parse: {literal}");
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match ret {
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Ok(pattern) => {
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println!("✨ {pattern:#?}");
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}
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Err(error) => {
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let error = error.with_source_code(literal);
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println!("💥 {error:?}");
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}
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}
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println!();
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}
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}
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