On 10/08/2018 9:57 PM, learnfirst1 wrote:
import core.stdc.stdio;
struct Test {
string name ;
}
void T(alias pred, A...)(){
__gshared t = Test(A) ;
pred(t);
}
extern(C) void main(){
T!(t => printf("test 1 name = %s\n".ptr, t.name.ptr), "test") ; //
build OK
T!(t => {
printf("test 2 name = %s\n".ptr, t.name.ptr);
}, "test") ; // build error
}
--------------
build this with betterC
Undefined symbols for architecture x86_64:
"__d_allocmemory", referenced from:
__D4test4mainUZ__T9__lambda2TSQBb4TestZQvFNaNbNfQtZDFNbNiZv in
test.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see
invocation)
Error: linker exited with status 1
to use without {}, it work as expect.
Is there a way to avoid this GC with {}, because we need multi line here.
Without the brackets it is inferring to not have state and hence is a
function. But with the brackets it is assuming there is state required
and hence has to allocate. Without manually allocating said state (not
what you want), you cannot do this.
