Bug 10485 – can not distinguish method call in string mixin!

code: --------------- class TestClass{ void call(){ } } mixin template test(string name){ mixin("scope " ~ name ~ " = new TestClass;" ); mixin( name ~ ".call();" ); } void main(){ mixin test!("var"); var.call(); } --------------- error: -------------- debug.d(10): Error: function declaration without return type. (Note that constructors are always named 'this') debug.d(10): Error: no identifier for declarator var.call() debug.d(10): Error: function debug.TestClass.call is used as a type debug.d(14): Error: mixin debug.main.test!("var") error instantiating --------------

this seems is a different but related bug: code: ---------------------- class TestClass{} mixin template test(string name){ mixin("scope " ~ name ~ " = new TestClass;" ); } void main(){ mixin test!("var"); } --------------------- run error: -------------------- object.Error: Illegal Instruction ---------------- 0x0012FE30 0x00402BFC 0x00402C37 0x00402835 0x00402098 0x7C817067 in RegisterWaitForInputIdle --------------------

Templates can only be used to create declarations, not expressions. One workaround is to write the code like the following: ----- import std.stdio; class TestClass { void call() { writeln("called"); } } mixin template test(string name) { struct S { void call() { scope tc = new TestClass; tc.call(); } } mixin("S " ~ name ~ ";"); } void main(){ mixin test!("var"); var.call(); } ----- But note that 'scope' is a feature that will eventually be deprecated.

(In reply to comment #1) > this seems is a different but related bug: > > code: > ---------------------- > class TestClass{} > mixin template test(string name){ > mixin("scope " ~ name ~ " = new TestClass;" ); > } > void main(){ > mixin test!("var"); > } > --------------------- It seems to be a bug related to scope, if you change it to 'auto' it will work. You could file this as a separate bug, but since scope is guaranteed to go away soon in a future release chances are low that it will be fixed.

Thanks for the quick response. I will use that scope late, the struct wrapper will not work here. I use this: ----- string test(string name, alias T1)(){ string code = "scope " ~ name ~ " = new ubyte[ " ~ T1.stringof~ ".length + 1 ];\n" ; code ~= data ~ "[$-1] = 0;\n" ; return code ; } void main(strings args){ mixin( test!("var", args[0]) ) ; capi_call(var.ptr); } ---- I will create bug for scope mixin.