http://d.puremagic.com/issues/show_bug.cgi?id=7706
Summary: Comparing struct rvalues Product: D Version: D2 Platform: All OS/Version: All Status: NEW Keywords: spec Severity: normal Priority: P2 Component: DMD AssignedTo: nob...@puremagic.com ReportedBy: k.hanaz...@gmail.com --- Comment #0 from Kasumi Hanazuki <k.hanaz...@gmail.com> 2012-03-13 21:17:28 PDT --- The spec says in operatoroverloading.dd: | Comparison operations are rewritten as follows: | ``a < b'' to ``a.opCmp(b) < 0'' or ``b.opCmp(a) > 0'' and | If structs declare an opCmp member function, it should follow the following form: | | struct S { | int opCmp(ref const S s) const { ... } | } If you follow these specs, you cannot accept comparison between two rvalues. For example S(0) < S(1), which is rewritten as S(0).opCmp(S(1)), is rejected _correctly_ by current DMD implementation (2.059HEAD). In order to resolve this problem, comparison operators on struct types must be translated as follows: a < b to (const _tmpb = b), a.opCmp(_tmpb) < 0 or (const _tmpa = a), b.opCmp(_tmpa) > 0 -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------