Bug 4931 – Implicit opCast!bool in if statement doesn't work with declarator

Created attachment 772 Patch against dmd r686 If an if statement has a variable declarator, a condition is implicitly converted to bool before its value is assigned to the declared variable. The following code doesn't compile: -------------------- void main() { if (S s = S()) {} // (3) } struct S { bool opCast(T : bool)() { return true; } } -------------------- % dmd -o- -c test.d test.d(3): Error: cannot implicitly convert expression (S().opCast()) of type bool to S

Patch was already applied at https://github.com/D-Programming-Language/dmd/commit/69349699a8f770c6e06b440dfd1822c50826136a by Don Clugston.