Function parse_spec 

pub fn parse_spec(input: &str) -> Result<LexerSpec, Box<dyn Error>>

Parses a lexer specification file.

The input should be in the format:

(Rust code)
%%
(Lexer rules)
%%
(Rust code)

Rules should be in the format: pattern -> TOKEN_NAME or just pattern.

Arguments

• input - The lexer specification file content

Returns

A Result containing the parsed LexerSpec or an error.

Examples

use klex::parse_spec;

let input = r#"
use std::collections::HashMap;
%%
[0-9]+ -> NUMBER
[a-zA-Z_][a-zA-Z0-9_]* -> IDENTIFIER
%%
// Generated code will be here
"#;

let spec = parse_spec(input).unwrap();
assert_eq!(spec.rules.len(), 2);