Skip to content

Resurrect ApplyLeft and ApplyRight's documentation #4875

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
MartinNowak merged 1 commit into from
Oct 24, 2016
Merged

Resurrect ApplyLeft and ApplyRight's documentation #4875

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
62 changes: 32 additions & 30 deletions std/meta.d
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1146,20 +1146,10 @@ template ApplyRight(alias Template, args...)
alias ApplyRight(left...) = SmartAlias!(Template!(left, args));
}

private template SmartAlias(T...) {
static if (T.length == 1)
{
alias SmartAlias = Alias!T;
}
else
{
alias SmartAlias = AliasSeq!T;
}
}

///
@safe unittest
{
// enum bool isImplicitlyConvertible(From, To)
import std.traits : isImplicitlyConvertible;

static assert(allSatisfy!(
Expand All @@ -1170,25 +1160,6 @@ private template SmartAlias(T...) {
ubyte, string, short, float, int) == AliasSeq!(ubyte, short)));
}

@safe unittest
{
static assert(is(typeof({
alias T(T0, int a, double b, alias T1, string c) = AliasSeq!(T0, a, b, T1, c);
alias T0 = ApplyRight!(ApplyLeft, ApplyRight);
alias T1 = T0!ApplyLeft;
alias T2 = T1!T;
alias T3 = T2!(3, "foo");
alias T4 = T3!(short, 3, 3.3);
static assert(Pack!T4.equals!(short, 3, 3.3, 3, "foo"));

import std.traits : isImplicitlyConvertible;
alias U1 = ApplyLeft!(ApplyRight, isImplicitlyConvertible);
alias U2 = U1!int;
enum U3 = U2!short;
static assert(U3);
})));
}

///
@safe unittest
{
Expand Down Expand Up @@ -1243,6 +1214,37 @@ private template SmartAlias(T...) {
typeof(&foo), typeof(&bar)) == SafeFunctions));
}

private template SmartAlias(T...)
{
static if (T.length == 1)
{
alias SmartAlias = Alias!T;
}
else
{
alias SmartAlias = AliasSeq!T;
}
}

@safe unittest
{
static assert(is(typeof({
alias T(T0, int a, double b, alias T1, string c) = AliasSeq!(T0, a, b, T1, c);
alias T0 = ApplyRight!(ApplyLeft, ApplyRight);
alias T1 = T0!ApplyLeft;
alias T2 = T1!T;
alias T3 = T2!(3, "foo");
alias T4 = T3!(short, 3, 3.3);
static assert(Pack!T4.equals!(short, 3, 3.3, 3, "foo"));

import std.traits : isImplicitlyConvertible;
alias U1 = ApplyLeft!(ApplyRight, isImplicitlyConvertible);
alias U2 = U1!int;
enum U3 = U2!short;
static assert(U3);
})));
}

/**
* Creates an `AliasSeq` which repeats a type or an `AliasSeq` exactly `n` times.
*/
Expand Down