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Implement opCmp and opEquals for the String

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This commit is contained in:
Eugen Wissner 2017-05-01 18:43:12 +02:00
parent e5c7edb72c
commit 8915a0c7a7
1 changed files with 126 additions and 11 deletions
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137
source/tanya/container/string.d
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@ -478,7 +478,7 @@ struct String
}
///
unittest
@safe @nogc unittest
{
{
auto s = String(1, 'О');
@ -859,7 +859,7 @@ struct String
}
///
unittest
@safe @nogc unittest
{
auto s = String("In allem Schreiben ist Schamlosigkeit.");
assert(s.capacity == 38);
@ -889,7 +889,7 @@ struct String
alias opDollar = length;
///
unittest
@safe @nogc unittest
{
auto s = String("Piscis primuin a capite foetat.");
assert(s.length == 31);
@ -915,7 +915,7 @@ struct String
}
///
unittest
@safe @nogc unittest
{
auto s = String("Alea iacta est.");
assert(s[0] == 'A');
@ -938,7 +938,7 @@ struct String
}
///
unittest
@safe @nogc unittest
{
auto s = String("Plutarchus");
auto r = s[];
@ -1014,7 +1014,7 @@ struct String
}
///
unittest
@safe @nogc unittest
{
auto s = String("Vladimir Soloviev");
auto r = s[9 .. $];
@ -1057,7 +1057,7 @@ struct String
*
* Returns: $(D_KEYWORD this).
*/
ref String opAssign(S)(S that) nothrow @safe @nogc
ref String opAssign(S)(S that)
if (is(S == String))
{
swap(this.data, that.data);
@ -1068,7 +1068,7 @@ struct String
}
/// Ditto.
ref String opAssig(S)(ref S that) nothrow @trusted @nogc
ref String opAssig(S)(ref S that) @trusted
if (is(Unqual!S == String))
{
reserve(that.length);
@ -1078,7 +1078,7 @@ struct String
}
///
unittest
@safe @nogc unittest
{
auto s = String("Черная, потом пропахшая выть!");
s = String("Как мне тебя не ласкать, не любить?");
@ -1095,7 +1095,7 @@ struct String
*
* Throws: $(D_PSYMBOL UTFException).
*/
ref String opAssign(S)(S that) nothrow @safe @nogc
ref String opAssign(S)(S that) nothrow
if (!isInfinite!S
&& isInputRange!S
&& isSomeChar!(ElementEncodingType!S))
@ -1106,11 +1106,126 @@ struct String
}
///
unittest
@safe @nogc unittest
{
auto s = String("Оловом светится лужная голь...");
s = "Грустная песня, ты - русская боль.";
}
/**
* Comparison for equality.
*
* Params:
* that = The string to compare with.
*
* Returns: A positive number if $(D_KEYWORD this) is lexicographically
* greater than $(D_PARAM that), if equal `0`, else `-1`.
*/
int opCmp(S)(auto ref S that) const @trusted
if (is(Unqual!S == String))
{
return cmp(this.data[0 .. length], that.data[0 .. that.length]);
}
/**
* Comparison for equality.
*
* Params:
* R = Right hand side type.
* that = Right hand side string range.
*
* Returns: A positive number if $(D_KEYWORD this) is lexicographically
* greater than $(D_PARAM that), if equal `0`, else `-1`.
*/
int opCmp(E)(ByCodeUnit!E that) const @trusted
if (is(Unqual!E == char))
{
return cmp(this.data[0 .. length],
that.begin[0 .. that.end - that.begin]);
}
/// Ditto.
int opCmp(E)(ByCodePoint!E that) const @trusted
if (is(Unqual!E == char))
{
return cmp(this.data[0 .. length],
that.begin[0 .. that.end - that.begin]);
}
/// Ditto.
int opCmp()(const char[] that) const @trusted
{
return cmp(this.data[0 .. length], that);
}
///
@safe @nogc unittest
{
assert(String("Голубая кофта.") < String("Синие глаза."));
assert(String("Никакой я правды") < String("милой не сказал")[]);
}
/**
* Comparison for equality.
*
* Params:
* that = The string to compare with.
*
* Returns: $(D_KEYWORD true) if the strings are equal, $(D_KEYWORD false)
* otherwise.
*/
bool opEquals(S)(auto ref S that) const @trusted
if (is(Unqual!S == String))
{
return equal(this.data[0 .. length], that.data[0 .. that.length]);
}
/**
* Comparison for equality.
*
* Params:
* R = Right hand side type.
* that = Right hand side string range.
*
* Returns: $(D_KEYWORD true) if the string and the range are equal,
* $(D_KEYWORD false) otherwise.
*/
bool opEquals(E)(ByCodeUnit!E that) const @trusted
if (is(Unqual!E == char))
{
return equal(this.data[0 .. length],
that.begin[0 .. that.end - that.begin]);
}
/// Ditto.
bool opEquals(E)(ByCodePoint!E that) const @trusted
if (is(Unqual!E == char))
{
return equal(this.data[0 .. length],
that.begin[0 .. that.end - that.begin]);
}
/// Ditto.
bool opEquals()(const char[] that) const @trusted
{
return equal(this.data[0 .. length], that);
}
///
@safe @nogc unittest
{
assert(String("Милая спросила:") != String("Крутит ли метель?"));
assert(String("Затопить бы печку,") != String("постелить постель.")[]);
assert(const String("Я ответил милой:") != String("Нынче с высоты"));
assert(String("Кто-то осыпает") != "белые цветы");
assert(const String("Затопи ты печку,") != String("постели постель,")[]);
auto s = const String("У меня на сердце");
assert(s[] != String("без тебя метель."));
assert(s == s);
assert(s == s[]);
assert(s == "У меня на сердце");
}
mixin DefaultAllocator;
}