Bug 1404 – Link failure with template mixin and function literal

When passing a function literal to a template such as: template Foo(alias condition) { bool invert() { return !condition(); } } .. the linker will fail if that template is mixed into a class. For example: class Bar { mixin Foo!(function { return false; }); } int main(char[][] args) { auto baz = new Bar(); if (baz.invert()) return 0; else return 1; } Compiling this results in the following error: $ dmd invertfail.d gcc invertfail.o -o invertfail -m32 -Xlinker -L/usr/local/bin/../lib -lphobos -lpthread -lm invertfail.o:(.rodata+0x2c): undefined reference to `_D10invertfail3Bar14__funcliteral1MFZb' collect2: ld gaf exit-status 1 terug --- errorlevel 1 However, the test case compiles and runs properly when instead the template is mixed directly into the main procedure. So this is specific the mixing into a class.

I have a similar case to add. Not sure if it is exactly the same bug, but I guess so. Somehow function literals disappear from the output when they are passed as an alias into a mixin template. template Impl(string entryPoint, alias wrapper) { mixin(`alias ` ~ entryPoint ~ `Checked = wrapper;`); } template OpenAL11() { mixin Impl!("alGetProcAddress", () {}); } void main() { OpenAL11!().alGetProcAddressChecked(); }

*** Issue 2220 has been marked as a duplicate of this issue. ***

The test case from Issue 2220: // --- template Foo(alias f) { void foo() { f(); } } class Bar { mixin Foo!( function { } ); } void main() {} // --- dmd issue211.d && issue211 OPTLINK (R) for Win32 Release 8.00.1 Copyright (C) Digital Mars 1989-2004 All rights reserved. issue211.obj(issue211) Error 42: Symbol Undefined _D8issue2113Bar14__funcliteral1MFZv

It works when I try it with the latest.