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add missing typecheck for const pattern match arm

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Issue #4968
This commit is contained in:
Jeong YunWon 2013-02-19 00:56:02 +09:00
parent a6945f2a45
commit 092b6114c1
2 changed files with 18 additions and 0 deletions
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1
src/librustc/middle/typeck/check/_match.rs
View File

@ -362,6 +362,7 @@ pub fn check_pat(pcx: pat_ctxt, pat: @ast::pat, expected: ty::t) {
ast::pat_ident(*) if pat_is_const(tcx.def_map, pat) => {
let const_did = ast_util::def_id_of_def(tcx.def_map.get(&pat.id));
let const_tpt = ty::lookup_item_type(tcx, const_did);
demand::suptype(fcx, pat.span, expected, const_tpt.ty);
fcx.write_ty(pat.id, const_tpt.ty);
}
ast::pat_ident(bm, name, sub) if pat_is_binding(tcx.def_map, pat) => {

17
src/test/compile-fail/issue-4968.rs Normal file
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@ -0,0 +1,17 @@
// Copyright 2013 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.
// Regression test for issue #4968
const A: (int,int) = (4,2);
fn main() {
match 42 { A => () } //~ ERROR mismatched types: expected `<VI0>` but found `(int,int)` (expected integral variable but found tuple)
}