50 lines
1.3 KiB
Rust
50 lines
1.3 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// General test that function items in static blocks
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// can be generated with a macro.
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#![feature(macro_rules)]
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struct MyType {
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desc: &'static str,
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data: uint,
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code: fn(uint, uint) -> uint
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}
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impl MyType {
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fn eval(&self, a: uint) -> uint {
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(self.code)(self.data, a)
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}
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}
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macro_rules! codegen {
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($e:expr, $v:expr) => {
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{
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fn generated(a: uint, b: uint) -> uint {
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a - ($e * b)
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}
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MyType {
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desc: "test",
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data: $v,
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code: generated
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}
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}
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}
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}
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static GENERATED_CODE_1: MyType = codegen!(2, 100);
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static GENERATED_CODE_2: MyType = codegen!(5, 1000);
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pub fn main() {
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assert_eq!(GENERATED_CODE_1.eval(10), 80);
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assert_eq!(GENERATED_CODE_2.eval(100), 500);
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}
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