Bug 7733 – [tdpl] opIndexUnary not called with postfix increment/decrement operators

struct S { int[] data; void opIndex(size_t i) { return data[i]; } void opIndexUnary(string op)(size_t i) { return mixin(op ~ "data[i]"); } } void main() { S s; s.data = [1,2,3]; ++s[0]; // OK s[0]++; // Error: s.opIndex(1u) is not an lvalue } This contradicts the specs, that specify that x++ is translated to ++x, which should cause opIndexUnary!"++" to be called, not opIndex.

Oops, typo in previous post: should be int opIndex(size_t i), not void.

TDPL references: p.378: "Postincrement and postdecrement are generated automatically from preincrement and predecrement, as described in § 12.2.2 on page 369. p.369: describes the rewriting of x++ as ++x when the value is not needed, and as ((ref x){auto t=x; ++x; return t;})(a) when the value is needed.

*** This issue has been marked as a duplicate of issue 5044 ***