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Alias std.traits.ParameterDefaults

Get, as a tuple, the default values of the parameters to a function symbol. If a parameter doesn't have the default value, void is returned instead.

alias ParameterDefaults(alias func) = AliasSeq!();


int foo(int num, string name = "hello", int[] = [1,2,3], lazy int x = 0);
static assert(is(ParameterDefaults!foo[0] == void));
static assert(   ParameterDefaults!foo[1] == "hello");
static assert(   ParameterDefaults!foo[2] == [1,2,3]);
static assert(   ParameterDefaults!foo[3] == 0);


Walter Bright, Tomasz Stachowiak (isExpressions), Andrei Alexandrescu, Shin Fujishiro, Robert Clipsham, David Nadlinger, Kenji Hara, Shoichi Kato


Boost License 1.0.