luaur-code-gen 0.1.0

use crate::enums::ir_op_kind::IrOpKind;
use crate::records::ir_function::IrFunction;
use crate::records::ir_inst::IrInst;
use crate::records::ir_op::IrOp;

impl IrFunction {
    pub fn as_inst_op(&mut self, op: IrOp) -> *mut IrInst {
        if op.kind() == IrOpKind::Inst {
            // Safety: the C++ source directly indexes into instructions[op.index] without bounds
            // checking, assuming the index is valid. We match that behavior here.
            unsafe { self.instructions.as_mut_ptr().add(op.index() as usize) }
        } else {
            std::ptr::null_mut()
        }
    }
}