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Refactor allSatisfy, anySatisfy, staticIndexOf

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This commit is contained in:
Eugen Wissner
2019-04-03 18:34:39 +02:00
parent b55bb767e5
commit d55eac3bac
1 changed files with 16 additions and 54 deletions
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70
meta/tanya/meta/metafunction.d
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@@ -798,22 +798,7 @@ alias AliasSeq(Args...) = Args;
* Returns: $(D_KEYWORD true) if all the items of $(D_PARAM L) satisfy
* $(D_PARAM F), $(D_KEYWORD false) otherwise.
*/
template allSatisfy(alias F, L...)
if (__traits(isTemplate, F))
{
static if (L.length == 0)
{
enum bool allSatisfy = true;
}
else static if (F!(L[0]))
{
enum bool allSatisfy = allSatisfy!(F, L[1 .. $]);
}
else
{
enum bool allSatisfy = false;
}
}
enum bool allSatisfy(alias F, L...) = Filter!(templateNot!F, L).length == 0;
///
@nogc nothrow pure @safe unittest
@@ -836,22 +821,7 @@ if (__traits(isTemplate, F))
* Returns: $(D_KEYWORD true) if any of the items of $(D_PARAM L) satisfy
* $(D_PARAM F), $(D_KEYWORD false) otherwise.
*/
template anySatisfy(alias F, L...)
if (__traits(isTemplate, F))
{
static if (L.length == 0)
{
enum bool anySatisfy = false;
}
else static if (F!(L[0]))
{
enum bool anySatisfy = true;
}
else
{
enum bool anySatisfy = anySatisfy!(F, L[1 .. $]);
}
}
enum bool anySatisfy(alias F, L...) = Filter!(F, L).length != 0;
///
@nogc nothrow pure @safe unittest
@@ -861,22 +831,19 @@ if (__traits(isTemplate, F))
static assert(!anySatisfy!(isSigned, uint, ushort, ulong));
}
private template indexOf(ptrdiff_t i, Args...)
if (Args.length > 0)
private template indexOf(Args...)
{
static if (Args.length == 1)
static foreach (i, Arg; Args[1 .. $])
{
static if (!is(typeof(indexOf) == ptrdiff_t) && isEqual!(Args[0], Arg))
{
enum ptrdiff_t indexOf = i;
}
}
static if (!is(typeof(indexOf) == ptrdiff_t))
{
enum ptrdiff_t indexOf = -1;
}
else static if (isEqual!(Args[0 .. 2]))
{
enum ptrdiff_t indexOf = i;
}
else
{
enum ptrdiff_t indexOf = indexOf!(i + 1,
AliasSeq!(Args[0], Args[2 .. $]));
}
}
/**
@@ -891,13 +858,13 @@ if (Args.length > 0)
*/
template staticIndexOf(T, L...)
{
enum ptrdiff_t staticIndexOf = indexOf!(0, AliasSeq!(T, L));
enum ptrdiff_t staticIndexOf = indexOf!(T, L);
}
/// ditto
template staticIndexOf(alias T, L...)
{
enum ptrdiff_t staticIndexOf = indexOf!(0, AliasSeq!(T, L));
enum ptrdiff_t staticIndexOf = indexOf!(T, L);
}
///
@@ -920,16 +887,10 @@ template staticIndexOf(alias T, L...)
* Returns: $(D_KEYWORD true) if $(D_PARAM T) can be found in $(D_PARAM L),
* $(D_KEYWORD false) otherwise.
*/
template canFind(T, L...)
{
enum bool canFind = indexOf!(0, AliasSeq!(T, L)) != -1;
}
enum bool canFind(T, L...) = staticIndexOf!(T, L) != -1;
/// ditto
template canFind(alias T, L...)
{
enum bool canFind = indexOf!(0, AliasSeq!(T, L)) != -1;
}
enum bool canFind(alias T, L...) = staticIndexOf!(T, L) != -1;
///
@nogc nothrow pure @safe unittest
@@ -1617,6 +1578,7 @@ template EraseAll(alias T, L...)
* $(D_PARAM pred).
*/
template Filter(alias pred, L...)
if (__traits(isTemplate, pred))
{
static if (L.length == 0)
{