Bug 2030 – String mixin within teplatate mixin doesn't compile

The following code doesn't compile: template foo (string init) { mixin ("string str = \"" ~ init ~ "\";"); } mixin (foo !("hello")); attribute argument to mixin must be a string, not (foo!("hello")) Analogous code without a string mixin works: template bar (string s) { string str = s; } mixin bar!("hello");

No, the analogous code is template bar (string s) { string str = s; } mixin (bar!("hello")); and it doesn't compile (and it shouldn't). Notice the parenthesis after mixin. There's a difference between mixin something; and mixin (something); The first one is a template mixin (http://digitalmars.com/d/1.0/template-mixin.html), the second one is a mixin (http://www.digitalmars.com/d/1.0/mixin.html). This compiles correctly: template bar (string s) { string str = s; } mixin bar!("hello");

On 24/04/2008, [email protected] <[email protected]> wrote: > mixin (foo !("hello")); Shouldn't that be mixin foo!("hello"); i.e. without the extra pair of parentheses?

Yes, it's a parentheses problem. Shows you that making two completely different constructs in a language differ only be parentheses is confusing.