Bug 8108 – Forward declaration and implementation allowed in same file

Currently, forward declaration is allowed, but it is presumed it is used to describe an extern function. I generate a lot of function implementations using magic, and I'd really like to describe them using the natural forward declaration rather than an ugly mixin template. Eg: // declare external interface void test(); void another(int x); // generate bindings mixin RegisterModule; // this produces code that scans the module for functions and generates their bodies This compiles, but when trying to call any such function, it produces the error: Error: function remedy.engine.debugdraw.test called with argument types: (()) matches both: remedy.engine.debugdraw.test() and: remedy.engine.debugdraw.test() One of which is the forward declaration. I think the forward declaration should silently yield the symbol to the actual function definition.

Commit pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/1857b718be782095689fb9f015d78f54f7aa95e2 fix Issue 8108 - Forward declaration and implementation allowed in same file

*** Issue 16329 has been marked as a duplicate of this issue. ***