Function parse_expression 

pub fn parse_expression(expr: &str) -> Result<Expression, HelError>

Parse a HEL expression into an AST (for advanced use cases)

Returns the parsed AST if successful, or a detailed parse error.

Examples

use hel::parse_expression;

let expr = r#"binary.format == "elf""#;
let ast = parse_expression(expr).expect("parse failed");