On Saturday, 25 June 2016 at 10:39:09 UTC, John wrote:
Thanks for the help, both. This appeared to work, until I
realised the lambda isn't static:
void match(T, cases...)() {
static if (cases.length == 1) cases[0]();
else static if (cases.length > 2) {
static if (is(typeof(cases[0]) == bool)) {
static if (cases[0]) cases[1]();
else match!(T, cases[2 .. $]);
}
else static if (is(T == cases[0])) cases[1]();
else match!(T, cases[2 .. $]);
}
}
void test(T)(T value) {
int i;
string s;
match!(T,
int, () => i = value,
string, () => s = value
);
}
test(1);
test("A string");
The compiler complains about not being able convert an int to a
string and vice versa.
If you want this to work, you need your lambdas to take the
casted value as a parameter:
void test(T)(T value) {
int i;
string s;
match!(value,
int, (val) => i = val,
string, (val) => s = val
);
}
And of course you need to modify match! for this to work.
