51 lines
1.4 KiB
Rust
51 lines
1.4 KiB
Rust
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// Copyright 2015 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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#![allow(non_snake_case)]
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register_long_diagnostics! {
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E0016: r##"
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Blocks in constants may only contain items (such as constant, function
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definition, etc...) and a tail expression. Example:
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```
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const FOO: i32 = { let x = 0; x }; // 'x' isn't an item!
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```
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To avoid it, you have to replace the non-item object:
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```
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const FOO: i32 = { const X : i32 = 0; X };
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```
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"##,
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E0022: r##"
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Constant functions are not allowed to mutate anything. Thus, binding to an
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argument with a mutable pattern is not allowed. For example,
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```
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const fn foo(mut x: u8) {
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// do stuff
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}
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```
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is bad because the function body may not mutate `x`.
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Remove any mutable bindings from the argument list to fix this error. In case
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you need to mutate the argument, try lazily initializing a global variable
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instead of using a `const fn`, or refactoring the code to a functional style to
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avoid mutation if possible.
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"##,
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}
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register_diagnostics! {
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E0472, // asm! is unsupported on this target
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}
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