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Enum member std.traits.hasFunctionAttributes
Checks whether a function has the given attributes attached.
enum hasFunctionAttributes(args...)
= ()
{
import std .algorithm .searching : canFind;
import std .range : only;
enum funcAttribs = only(__traits(getFunctionAttributes, args[0]));
static foreach (attribute; args[1..__dollar])
{
if (!funcAttribs .canFind(attribute))
return false;
}
return true;
}
();
Parameters
Name | Description |
---|---|
args | Function to check, followed by a variadic number of function attributes as strings |
Returns
true
, if the function has the list of attributes attached and false
otherwise.
See Also
Example
real func(real x) pure nothrow @safe;
static assert(hasFunctionAttributes!(func, "@safe", "pure"));
static assert(!hasFunctionAttributes!(func, "@trusted"));
// for templates attributes are automatically inferred
bool myFunc(T)(T b)
{
return !b;
}
static assert(hasFunctionAttributes!(myFunc!bool, "@safe", "pure", "@nogc", "nothrow"));
static assert(!hasFunctionAttributes!(myFunc!bool, "shared"));
Authors
Walter Bright,
Tomasz Stachowiak (isExpressions
),
Andrei Alexandrescu,
Shin Fujishiro,
Robert Clipsham,
David Nadlinger,
Kenji Hara,
Shoichi Kato
License
Copyright © 1999-2022 by the D Language Foundation | Page generated by ddox.