You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: compiler.go
    path of file: ./repos/podman/vendor/github.com/bytedance/sonic/internal/decoder
    
    the code of the file until where you have to start completion: /*
 * Copyright 2021 ByteDance Inc.
 *
 * Licensed under the Apache License,
    
func _OP_int() _Op {
    switch _INT_SIZE {
        case 32: return _OP_i32
        case 64: return _OP_i64
        default: panic("unsupported int size")
    }
}