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Bug 5810 – Struct postincrement generates 'no effect' error if used on struct member

Status: RESOLVED
Resolution: FIXED
Severity: normal
Priority: P2
Component: dmd
Product: D
Version: D2
Platform: All
OS: All
Creation time: 2011-04-03T16:33:00Z
Last change time: 2014-06-09T04:27:45Z
Keywords: diagnostic, pull, rejects-valid
Assigned to: nobody
Creator: bearophile_hugs

Comments

Comment #0 by bearophile_hugs — 2011-04-03T16:33:07Z

import std.bigint; struct Foo { BigInt x; void bar() { x++; } } void main() {} DMD 2.052 shows: test.d(4): Error: var has no effect in expression (__tmp19)

Comment #1 by clugdbug — 2011-05-06T04:17:21Z

It's nothing to do with BigInt. Here's a reduced test case: struct Bug5810 { void opUnary(string op)() { } } struct Foo { Bug5810 x; void bar() { x++; } } test2.d(13): Error: var has no effect in expression (__pitmp4)

Comment #2 by k.hara.pg — 2014-05-30T02:46:24Z

https://github.com/D-Programming-Language/dmd/pull/3605

Comment #3 by bearophile_hugs — 2014-05-30T06:35:12Z

I guess Issue 12816 is a dupe

Comment #4 by k.hara.pg — 2014-05-30T07:34:53Z

*** Issue 12816 has been marked as a duplicate of this issue. ***

Comment #5 by github-bugzilla — 2014-05-30T17:58:04Z

Commits pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/ffd3ba8dd8741529f6efc215b3c3442f973a4644 fix Issue 5810 - Struct postincrement generates 'no effect' error if used on struct member https://github.com/D-Programming-Language/dmd/commit/6e820f902a136f0a574deb4bf2f0ada86fe44047 Merge pull request #3605 from 9rnsr/fix5810 Issue 5810 - Struct postincrement generates 'no effect' error if used on struct member

Comment #6 by k.hara.pg — 2014-06-09T04:27:45Z

*** Issue 10578 has been marked as a duplicate of this issue. ***