Function generate_lut 

pub fn generate_lut(
    input: &str,
    output: &str,
    handler_mod: &str,
    ctx_type: &str,
) -> Result<(), Box<dyn Error>>

Generate a function-pointer LUT from a .chipi spec file.

Produces a Rust source file containing:

• pub type Handler = fn(&mut Ctx, u32)
• Static dispatch tables (_T0, _T1, …) indexed by opcode bit ranges
• pub fn dispatch(ctx: &mut Ctx, opcode: u32)

handler_mod is the module path where handler functions live, e.g. "crate::cpu::interpreter"Each instruction foo in the spec must have a corresponding pub fn foo(ctx: &mut Ctx, opcode: u32) there.

ctx_type is the mutable context passed to every handler, e.g. "crate::gekko::Gekko".

Example (build.rs)

chipi::generate_lut(
    "cpu.chipi",
    out_dir.join("cpu_lut.rs").to_str().unwrap(),
    "crate::cpu::interpreter",
    "crate::Cpu",
)?;