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Bug 13818 – Unhelpful error message for rvalue reference: incompatible types for ((S()) + (S())): 'S' and 'S'

Status: NEW
Severity: normal
Priority: P3
Component: dmd
Product: D
Version: D2
Platform: All
OS: All
Creation time: 2014-12-04T18:45:09Z
Last change time: 2024-12-13T18:38:14Z
Assigned to: No Owner
Creator: Ali Cehreli

Comments

Comment #0 by acehreli — 2014-12-04T18:45:09Z

struct S { void opBinary(string op)(ref S rhs) {} } void main() { auto result = S() + S(); } Error: incompatible types for ((S()) + (S())): 'S' and 'S' The message is bogus because S is compatible with S. ;)

Comment #1 by n8sh.secondary — 2019-08-23T21:28:02Z

As of https://github.com/dlang/dmd/pull/7441 the error message is "Error: incompatible types for (S()) + (S()): both operands are of type S".

Comment #2 by acehreli — 2019-08-25T14:19:59Z

There is no issue with both operands being S. The issue seems to be the fact that the second operand is an rvalue. So, a helpful message would be "cannot bind rvalue S to ref parameter". Ali

Comment #3 by robert.schadek — 2024-12-13T18:38:14Z

THIS ISSUE HAS BEEN MOVED TO GITHUB https://github.com/dlang/dmd/issues/17690 DO NOT COMMENT HERE ANYMORE, NOBODY WILL SEE IT, THIS ISSUE HAS BEEN MOVED TO GITHUB