On Friday, 4 April 2014 at 13:22:39 UTC, ketmar wrote:
i have some C code like this:
void func0 (void) { … }
int func1 (void) { … return smth+42; }
#define MYMACRO() ({ func0(); func1(); })
int v;
…
v = MYMACRO()-16;
<snip>
v = mixin(MYMACRO())-16;
and have the same effect as in C code: all MYMACRO content
(this can be almost anything) *always* inlined. the only thing
i was able to think out is to generate nested functions with
immediate call in MYMACRO, but it will not guarantee inlining
(i.e. i must trust compiler intellgence here).
You can hack around that limitation if it's acceptable to use a
temporary variable:
enum MYMACRO(alias output) = `func0(); ` ~ output.stringof ~ ` =
func1();`;
...
int a;
mixin(MYMACRO!a);
v = a - 16;
This uses the new enum template syntax available in current DMD,
alternatively use:
template MYMACRO(alias output) {
enum MYMACRO = ...;
}
Unfortunately, you cannot use template mixins for this, because
they can only contain declarations, not statements.
