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Alias std.traits.ParameterStorageClassTuple
Get tuple, one per function parameter, of the storage classes of the parameters.
alias ParameterStorageClassTuple(func...)
= StorageClass!0;
Parameters
Name | Description |
---|---|
func | function symbol or type of function, delegate, or pointer to function |
Returns
A tuple of ParameterStorageClass bits
Example
alias STC = ParameterStorageClass; // shorten the enum name
void func(ref int ctx, out real result, in real param, void* ptr)
{
}
alias pstc = ParameterStorageClassTuple!func;
static assert(pstc .length == 4); // number of parameters
static assert(pstc[0] == STC .ref_);
static assert(pstc[1] == STC .out_);
version (none)
{
// TODO: When the DMD PR (dlang/dmd#11474) gets merged,
// remove the versioning and the second test
static assert(pstc[2] == STC .in_);
// This is the current behavior, before `in` is fixed to not be an alias
static assert(pstc[2] == STC .scope_);
}
static assert(pstc[3] == STC .none);
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.