37 lines
914 B
Rust
37 lines
914 B
Rust
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// Copyright 2018 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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#![feature(attr_literals, rustc_attrs, const_fn)]
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#[rustc_args_required_const(0)]
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fn foo(_a: i32) {
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}
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#[rustc_args_required_const(1)]
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fn bar(_a: i32, _b: i32) {
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}
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const A: i32 = 3;
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const fn baz() -> i32 {
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3
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}
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fn main() {
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foo(2);
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foo(2 + 3);
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foo(baz());
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let a = 4;
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foo(A);
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foo(a); //~ ERROR: argument 1 is required to be a constant
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bar(a, 3);
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bar(a, a); //~ ERROR: argument 2 is required to be a constant
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}
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