Function compile_to_air 

pub fn compile_to_air(source: &str) -> MultiErrorResult<AirOutput>

Compile source code up to AIR (typed IR) without building CFG.

This is a test helper that runs: lexing → parsing → AST to RIR → semantic analysis. It stops before CFG construction, making it fast for testing type checking and semantic analysis.

Example

use gruel_compiler::compile_to_air;

let result = compile_to_air("fn main() -> i32 { 1 + 2 * 3 }");
assert!(result.is_ok());