67 lines
2.3 KiB
Rust
67 lines
2.3 KiB
Rust
// Copyright 2017 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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struct UnitStruct;
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struct TupleStruct();
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struct BracedStruct{}
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enum E {
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UnitVariant,
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TupleVariant(),
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BracedVariant{},
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}
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use E::*;
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const CONST: () = ();
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static STATIC: () = ();
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fn function() {}
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fn main() {
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let doesnt_matter = 0;
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match UnitStruct {
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UnitStruct => {} // OK, `UnitStruct` is a unit struct pattern
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}
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match doesnt_matter {
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TupleStruct => {} //~ ERROR match bindings cannot shadow tuple structs
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}
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match doesnt_matter {
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BracedStruct => {} // OK, `BracedStruct` is a fresh binding
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}
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match UnitVariant {
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UnitVariant => {} // OK, `UnitVariant` is a unit variant pattern
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}
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match doesnt_matter {
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TupleVariant => {} //~ ERROR match bindings cannot shadow tuple variants
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}
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match doesnt_matter {
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BracedVariant => {} //~ ERROR match bindings cannot shadow struct variants
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}
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match CONST {
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CONST => {} // OK, `CONST` is a const pattern
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}
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match doesnt_matter {
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STATIC => {} //~ ERROR match bindings cannot shadow statics
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}
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match doesnt_matter {
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function => {} // OK, `function` is a fresh binding
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}
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let UnitStruct = UnitStruct; // OK, `UnitStruct` is a unit struct pattern
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let TupleStruct = doesnt_matter; //~ ERROR let bindings cannot shadow tuple structs
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let BracedStruct = doesnt_matter; // OK, `BracedStruct` is a fresh binding
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let UnitVariant = UnitVariant; // OK, `UnitVariant` is a unit variant pattern
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let TupleVariant = doesnt_matter; //~ ERROR let bindings cannot shadow tuple variants
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let BracedVariant = doesnt_matter; //~ ERROR let bindings cannot shadow struct variants
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let CONST = CONST; // OK, `CONST` is a const pattern
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let STATIC = doesnt_matter; //~ ERROR let bindings cannot shadow statics
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let function = doesnt_matter; // OK, `function` is a fresh binding
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}
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