1 unstable release
0.1.0 | Nov 30, 2024 |
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#2204 in Parser implementations
177 downloads per month
Used in 2 crates
155KB
5K
SLoC
The parser for WebAssembly Text Format.
This parser is error-tolerant, which means it can parse even even if the input contains syntax errors.
This parser will produce concrete syntax tree (CST),
but you can build AST from it with a bunch of helpers from wat_syntax::ast
module.
Usage
You need to create a parser instance with source code. Once created, the source code can't be changed. So if you want to parse different source code, you need to create a new parser instance.
use wat_parser::Parser;
use wat_syntax::SyntaxKind;
let input = "(module)";
let mut parser = Parser::new(input);
let tree = parser.parse();
assert_eq!(tree.kind(), SyntaxKind::ROOT);
Any syntax errors won't prevent the parser from parsing the rest of the input, however you can retrieve the errors like this:
use wat_parser::Parser;
use wat_syntax::SyntaxKind;
let input = "(module";
let mut parser = Parser::new(input);
let tree = parser.parse();
let errors = parser.errors();
assert_eq!(errors[0].start, 7);
assert!(errors[0].message.to_string().contains("expected `)`"));
Dependencies
~1.5MB
~30K SLoC