mirrors/phobos
1
0
Fork 0
mirror of https://github.com/dlang/phobos.git synced 2025-04-27 21:51:40 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions

Moved filter to the public section.

Browse source 
It seems that Filter accidentally got put in the private section of the
file, and now that the bug making all templates public has been fixed,
Filter isn't useable.
This commit is contained in:
jmdavis 2012-09-16 21:14:08 -07:00
parent 96765530f9
commit 0ff85c49b1
1 changed files with 43 additions and 42 deletions
Download patch file Download diff file Expand all files Collapse all files

85
std/typetuple.d
View file

@ -628,6 +628,49 @@ unittest
static assert(anySatisfy!(isIntegral, int, double));
}
/++
Filters a $(D TypeTuple) using a template predicate. Returns a
$(D TypeTuple) of the elements which satisfy the predicate.
Examples:
--------------------
static assert(is(Filter!(isNarrowString, string, wstring,
dchar[], char[], dstring, int) ==
TypeTuple!(string, wstring, char[])));
static assert(is(Filter!(isUnsigned, int, byte, ubyte,
dstring, dchar, uint, ulong) ==
TypeTuple!(ubyte, uint, ulong)));
--------------------
+/
template Filter(alias pred, TList...)
{
static if(TList.length == 0)
alias TypeTuple!() Filter;
else static if(pred!(TList[0]))
alias TypeTuple!(TList[0], Filter!(pred, TList[1 .. $])) Filter;
else
alias Filter!(pred, TList[1 .. $]) Filter;
}
//Verify Examples
unittest
{
static assert(is(Filter!(isNarrowString, string, wstring,
dchar[], char[], dstring, int) ==
TypeTuple!(string, wstring, char[])));
static assert(is(Filter!(isUnsigned, int, byte, ubyte,
dstring, dchar, uint, ulong) ==
TypeTuple!(ubyte, uint, ulong)));
}
unittest
{
static assert(is(Filter!(isPointer, int, void*, char[], int*) == TypeTuple!(void*, int*)));
static assert(is(Filter!isPointer == TypeTuple!()));
}
// : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : //
private:
@ -779,48 +822,6 @@ unittest
}
/++
Filters a $(D TypeTuple) using a template predicate. Returns a
$(D TypeTuple) of the elements which satisfy the predicate.
Examples:
--------------------
static assert(is(Filter!(isNarrowString, string, wstring,
dchar[], char[], dstring, int) ==
TypeTuple!(string, wstring, char[])));
static assert(is(Filter!(isUnsigned, int, byte, ubyte,
dstring, dchar, uint, ulong) ==
TypeTuple!(ubyte, uint, ulong)));
--------------------
+/
template Filter(alias pred, TList...)
{
static if(TList.length == 0)
alias TypeTuple!() Filter;
else static if(pred!(TList[0]))
alias TypeTuple!(TList[0], Filter!(pred, TList[1 .. $])) Filter;
else
alias Filter!(pred, TList[1 .. $]) Filter;
}
//Verify Examples
unittest
{
static assert(is(Filter!(isNarrowString, string, wstring,
dchar[], char[], dstring, int) ==
TypeTuple!(string, wstring, char[])));
static assert(is(Filter!(isUnsigned, int, byte, ubyte,
dstring, dchar, uint, ulong) ==
TypeTuple!(ubyte, uint, ulong)));
}
unittest
{
static assert(is(Filter!(isPointer, int, void*, char[], int*) == TypeTuple!(void*, int*)));
static assert(is(Filter!isPointer == TypeTuple!()));
}
/*
* Instantiates the given template with the given list of parameters.
*