hasNestedMember

Test existance of the nested member (or not nested).

package

template hasNestedMember (

T

string members

) {

import std.string : split, join;;

enum string[] memberSplited;

static if(is(T t == T))

static if(memberSplited.length > 1)

static if(__traits(hasMember, T, memberSplited[0]))

enum bool hasNestedMember;

static if(is(T t == T))

static if(memberSplited.length > 1)

static if(!(__traits(hasMember, T, memberSplited[0])))

enum bool hasNestedMember;

static if(is(T t == T))

static if(!(memberSplited.length > 1))

enum bool hasNestedMember;

}

Members

Variables

hasNestedMember enum bool hasNestedMember;: Undocumented in source.
hasNestedMember enum bool hasNestedMember;: Undocumented in source.
hasNestedMember enum bool hasNestedMember;: Undocumented in source.
memberSplited enum string[] memberSplited;: Undocumented in source.

Parameters

T: The type where member are nested
members: the member to test (e.g. "foo.bar.baz")

Examples

static class A {
    int bar;
}

static class B {
    A foo = new A();
}

static class C {
    B bar = new B();
}

static assert(hasNestedMember!(B, "foo.bar"));
static assert(!hasNestedMember!(B, "data.bar"));
static assert(!hasNestedMember!(B, "foo.baz"));
static assert(hasNestedMember!(B, "foo"));
static assert(!hasNestedMember!(B, "fooz"));
static assert(!hasNestedMember!(C, "bar.foo.baz"));
static assert(hasNestedMember!(C, "bar.foo.bar"));

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