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typecons.Pair: Add better documentation unittests

This commit is contained in:
Eugen Wissner 2018-03-21 08:14:52 +01:00
parent 7af5b4db72
commit 1f4ab88254
1 changed files with 23 additions and 15 deletions
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38
source/tanya/typecons.d
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@ -8,7 +8,7 @@
* This module contains templates that allow to build new types from the
* available ones.
*
* Copyright: Eugene Wissner 2017.
* Copyright: Eugene Wissner 2017-2018.
* License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
* Mozilla Public License, v. 2.0).
* Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
@ -36,7 +36,7 @@ import tanya.meta.metafunction;
*/
template Pair(Specs...)
{
template parseSpecs(int fieldCount, Specs...)
template parseSpecs(size_t fieldCount, Specs...)
{
static if (Specs.length == 0)
{
@ -47,13 +47,13 @@ template Pair(Specs...)
static if (is(typeof(Specs[1]) == string))
{
alias parseSpecs
= AliasSeq!(Specs[0],
= AliasSeq!(Tuple!(Specs[0], Specs[1]),
parseSpecs!(fieldCount + 1, Specs[2 .. $]));
}
else
{
alias parseSpecs
= AliasSeq!(Specs[0],
= AliasSeq!(Tuple!(Specs[0]),
parseSpecs!(fieldCount + 1, Specs[1 .. $]));
}
}
@ -63,25 +63,24 @@ template Pair(Specs...)
}
}
alias ChooseType(alias T) = T.Seq[0];
alias ParsedSpecs = parseSpecs!(0, Specs);
static assert(ParsedSpecs.length == 2, "Invalid argument count");
struct Pair
{
/// Field types.
alias Types = parseSpecs!(0, Specs);
static assert(Types.length == 2, "Invalid argument count.");
alias Types = Map!(ChooseType, ParsedSpecs);
// Create field aliases.
static if (is(typeof(Specs[1]) == string))
static if (ParsedSpecs[0].length == 2)
{
mixin("alias " ~ Specs[1] ~ " = expand[0];");
mixin("alias " ~ ParsedSpecs[0][1] ~ " = expand[0];");
}
static if (is(typeof(Specs[2]) == string))
static if (ParsedSpecs[1].length == 2)
{
mixin("alias " ~ Specs[2] ~ " = expand[1];");
}
else static if (is(typeof(Specs[3]) == string))
{
mixin("alias " ~ Specs[3] ~ " = expand[1];");
mixin("alias " ~ ParsedSpecs[1][1] ~ " = expand[1];");
}
/// Represents the values of the $(D_PSYMBOL Pair) as a list of values.
@ -92,6 +91,15 @@ template Pair(Specs...)
}
///
@nogc nothrow pure @safe unittest
{
auto pair = Pair!(int, "first", string, "second")(1, "second");
assert(pair.first == 1);
assert(pair[0] == 1);
assert(pair.second == "second");
assert(pair[1] == "second");
}
@nogc nothrow pure @safe unittest
{
static assert(is(Pair!(int, int)));