OSS
/
tanya
1
0
Fork 0
Code Issues 1 Pull Requests Releases Activity

Move Smallest and Largest to meta.transform 

Smallest and Largest choose the smallest or largest (according to
.sizeof property) type in the list of types. These templates get a list
of types and produce a type, so they are transformations.
This commit is contained in:
Eugen Wissner 2018-05-02 15:50:28 +02:00
parent 4f6ce116bc
commit cd1a38f402
2 changed files with 83 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
source/tanya/meta/trait.d
View File

@ -70,17 +70,7 @@ enum bool isWideString(T) = is(T : const dchar[]) && !isStaticArray!T;
static assert(!isWideString!(dchar[10]));
}
/**
* Finds the type with the smallest size in the $(D_PARAM Args) list. If
* several types have the same type, the leftmost is returned.
*
* Params:
* Args = Type list.
*
* Returns: The smallest type.
*
* See_Also: $(D_PSYMBOL Largest).
*/
deprecated("Use tanya.meta.transform.Smallest instead")
template Smallest(Args...)
if (Args.length >= 1)
{
@ -100,15 +90,6 @@ if (Args.length >= 1)
}
}
///
@nogc nothrow pure @safe unittest
{
static assert(is(Smallest!(int, ushort, uint, short) == ushort));
static assert(is(Smallest!(short) == short));
static assert(is(Smallest!(ubyte[8], ubyte[5]) == ubyte[5]));
static assert(!is(Smallest!(short, 5)));
}
/**
* Determines whether $(D_PARAM T) is a complex type.
*
@ -185,6 +166,9 @@ enum bool isPolymorphicType(T) = is(T == class) || is(T == interface);
}
/**
* Determines whether the type $(D_PARAM T) has a static method
* named $(D_PARAM member).
*
* Params:
* T = Aggregate type.
* member = Symbol name.
@ -944,17 +928,7 @@ template mostNegative(T)
static assert(mostNegative!cfloat == -cfloat.max);
}
/**
* Finds the type with the largest size in the $(D_PARAM Args) list. If several
* types have the same type, the leftmost is returned.
*
* Params:
* Args = Type list.
*
* Returns: The largest type.
*
* See_Also: $(D_PSYMBOL Smallest).
*/
deprecated("Use tanya.meta.transform.Largest instead")
template Largest(Args...)
if (Args.length >= 1)
{
@ -974,15 +948,6 @@ if (Args.length >= 1)
}
}
///
@nogc nothrow pure @safe unittest
{
static assert(is(Largest!(int, short, uint) == int));
static assert(is(Largest!(short) == short));
static assert(is(Largest!(ubyte[8], ubyte[5]) == ubyte[8]));
static assert(!is(Largest!(short, 5)));
}
/**
* Determines whether the type $(D_PARAM T) is copyable.
*

78
source/tanya/meta/transform.d
View File

@ -901,3 +901,81 @@ if (allSatisfy!(isType, Args))
static assert(is(CommonType!(S, int) == void));
static assert(is(CommonType!(const S, S) == const S));
}
/**
* Finds the type with the smallest size in the $(D_PARAM Args) list. If
* several types have the same type, the leftmost is returned.
*
* Params:
* Args = Type list.
*
* Returns: The smallest type.
*
* See_Also: $(D_PSYMBOL Largest).
*/
template Smallest(Args...)
if (Args.length >= 1)
{
static assert(is(Args[0]), T.stringof ~ " doesn't have .sizeof property");
static if (Args.length == 1)
{
alias Smallest = Args[0];
}
else static if (Smallest!(Args[1 .. $]).sizeof < Args[0].sizeof)
{
alias Smallest = Smallest!(Args[1 .. $]);
}
else
{
alias Smallest = Args[0];
}
}
///
@nogc nothrow pure @safe unittest
{
static assert(is(Smallest!(int, ushort, uint, short) == ushort));
static assert(is(Smallest!(short) == short));
static assert(is(Smallest!(ubyte[8], ubyte[5]) == ubyte[5]));
static assert(!is(Smallest!(short, 5)));
}
/**
* Finds the type with the largest size in the $(D_PARAM Args) list. If several
* types have the same type, the leftmost is returned.
*
* Params:
* Args = Type list.
*
* Returns: The largest type.
*
* See_Also: $(D_PSYMBOL Smallest).
*/
template Largest(Args...)
if (Args.length >= 1)
{
static assert(is(Args[0]), T.stringof ~ " doesn't have .sizeof property");
static if (Args.length == 1)
{
alias Largest = Args[0];
}
else static if (Largest!(Args[1 .. $]).sizeof > Args[0].sizeof)
{
alias Largest = Largest!(Args[1 .. $]);
}
else
{
alias Largest = Args[0];
}
}
///
@nogc nothrow pure @safe unittest
{
static assert(is(Largest!(int, short, uint) == int));
static assert(is(Largest!(short) == short));
static assert(is(Largest!(ubyte[8], ubyte[5]) == ubyte[8]));
static assert(!is(Largest!(short, 5)));
}