| // Copyright 2017 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| struct UnitStruct; |
| struct TupleStruct(); |
| struct BracedStruct{} |
| |
| enum E { |
| UnitVariant, |
| TupleVariant(), |
| BracedVariant{}, |
| } |
| use E::*; |
| |
| const CONST: () = (); |
| static STATIC: () = (); |
| |
| fn function() {} |
| |
| fn main() { |
| let doesnt_matter = 0; |
| |
| match UnitStruct { |
| UnitStruct => {} // OK, `UnitStruct` is a unit struct pattern |
| } |
| match doesnt_matter { |
| TupleStruct => {} //~ ERROR match bindings cannot shadow tuple structs |
| } |
| match doesnt_matter { |
| BracedStruct => {} // OK, `BracedStruct` is a fresh binding |
| } |
| match UnitVariant { |
| UnitVariant => {} // OK, `UnitVariant` is a unit variant pattern |
| } |
| match doesnt_matter { |
| TupleVariant => {} //~ ERROR match bindings cannot shadow tuple variants |
| } |
| match doesnt_matter { |
| BracedVariant => {} //~ ERROR match bindings cannot shadow struct variants |
| } |
| match CONST { |
| CONST => {} // OK, `CONST` is a const pattern |
| } |
| match doesnt_matter { |
| STATIC => {} //~ ERROR match bindings cannot shadow statics |
| } |
| match doesnt_matter { |
| function => {} // OK, `function` is a fresh binding |
| } |
| |
| let UnitStruct = UnitStruct; // OK, `UnitStruct` is a unit struct pattern |
| let TupleStruct = doesnt_matter; //~ ERROR let bindings cannot shadow tuple structs |
| let BracedStruct = doesnt_matter; // OK, `BracedStruct` is a fresh binding |
| let UnitVariant = UnitVariant; // OK, `UnitVariant` is a unit variant pattern |
| let TupleVariant = doesnt_matter; //~ ERROR let bindings cannot shadow tuple variants |
| let BracedVariant = doesnt_matter; //~ ERROR let bindings cannot shadow struct variants |
| let CONST = CONST; // OK, `CONST` is a const pattern |
| let STATIC = doesnt_matter; //~ ERROR let bindings cannot shadow statics |
| let function = doesnt_matter; // OK, `function` is a fresh binding |
| } |