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Enum member std.traits.allSameType
enum allSameType(Ts...)
= ()
{
static foreach (T; Ts[Ts .length > 1..__dollar])
{
static if (!is(Ts[0] == T))
{
if (__ctfe)
return false;
}
}
return true;
}
();
Returns
true
iff all types Ts
are the same.
Example
static assert(allSameType!());
static assert(allSameType!(int));
static assert(allSameType!(int, int));
static assert(allSameType!(int, int, int));
static assert(allSameType!(float, float, float));
static assert(!allSameType!(int, double));
static assert(!allSameType!(int, float, double));
static assert(!allSameType!(int, float, double, real));
static assert(!allSameType!(short, int, float, double, real));
}
/**
Returns: `true` iff the type `T` can be tested in an <code class="lang-d"><span class="kwd">if</span></code>-expression, that is if <code class="lang-d"><span class="kwd">if </span><span class="pun">(</span><span class="pln">pred</span><span class="pun">(</span><span class="pln">T<wbr/></span><span class="pun">.</span><span class="pln">init</span><span class="pun">)) {}</span></code> is compilable.
*/
enum ifTestable(T, alias pred = a => a) = __traits(compiles, { if (pred(T .init)) {}
Authors
Walter Bright,
Tomasz Stachowiak (isExpressions
),
Andrei Alexandrescu,
Shin Fujishiro,
Robert Clipsham,
David Nadlinger,
Kenji Hara,
Shoichi Kato
License
Copyright © 1999-2024 by the D Language Foundation | Page generated by ddox.