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Move remaining to methods to tanya.conv

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This commit is contained in:
Eugen Wissner
2017-11-29 19:09:58 +01:00
parent 642717883e
commit 7e7bf40f70
2 changed files with 168 additions and 68 deletions
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164
source/tanya/conv.d
View File

@@ -14,9 +14,12 @@
*/
module tanya.conv;
import tanya.container.string;
import tanya.format;
import tanya.memory;
import tanya.memory.op;
import tanya.meta.trait;
import tanya.meta.transform;
version (unittest)
{
@@ -543,3 +546,164 @@ if (isIntegral!From && is(To == enum))
}
assertThrown!ConvException(&to!(Test, int), 5);
}
/**
* Converts $(D_PARAM from) to a boolean.
*
* If $(D_PARAM From) is a numeric type, then `1` becomes $(D_KEYWORD true),
* `0` $(D_KEYWORD false). Otherwise $(D_PSYMBOL ConvException) is thrown.
*
* If $(D_PARAM To) is a string (built-in string or $(D_PSYMBOL String)),
* then `"true"` or `"false"` are converted to the appropriate boolean value.
* Otherwise $(D_PSYMBOL ConvException) is thrown.
*
* Params:
* From = Source type.
* To = Target type.
* from = Source value.
*
* Returns: $(D_KEYWORD from) converted to a boolean.
*
* Throws: $(D_PSYMBOL ConvException) if $(D_PARAM from) isn't convertible.
*/
To to(To, From)(From from)
if (isNumeric!From && is(Unqual!To == bool) && !is(Unqual!To == Unqual!From))
{
if (from == 0)
{
return false;
}
else if (from < 0)
{
throw make!ConvException(defaultAllocator,
"Negative number overflow");
}
else if (from <= 1)
{
return true;
}
throw make!ConvException(defaultAllocator,
"Positive number overflow");
}
///
@nogc pure @safe unittest
{
assert(!0.0.to!bool);
assert(0.2.to!bool);
assert(0.5.to!bool);
assert(1.0.to!bool);
assert(!0.to!bool);
assert(1.to!bool);
}
@nogc pure @safe unittest
{
assertThrown!ConvException(&to!(bool, int), -1);
assertThrown!ConvException(&to!(bool, int), 2);
}
/// ditto
To to(To, From)(auto ref const From from)
if ((is(From == String) || isSomeString!From) && is(Unqual!To == bool))
{
if (from == "true")
{
return true;
}
else if (from == "false")
{
return false;
}
throw make!ConvException(defaultAllocator,
"String doesn't contain a boolean value");
}
///
@nogc pure @safe unittest
{
assert("true".to!bool);
assert(!"false".to!bool);
assert(String("true").to!bool);
assert(!String("false").to!bool);
}
@nogc pure @safe unittest
{
assertThrown!ConvException(() => "1".to!bool);
}
/**
* Converts a boolean to $(D_PARAM To).
*
* If $(D_PARAM To) is a numeric type, then $(D_KEYWORD true) becomes `1`,
* $(D_KEYWORD false) `0`.
*
* If $(D_PARAM To) is a $(D_PSYMBOL String), then `"true"` or `"false"`
* is returned.
*
* Params:
* From = Source type.
* To = Target type.
* from = Source value.
*
* Returns: $(D_PARAM from) converted to $(D_PARAM To).
*/
To to(To, From)(From from)
if (is(Unqual!From == bool) && isNumeric!To && !is(Unqual!To == Unqual!From))
{
return from;
}
///
@nogc nothrow pure @safe unittest
{
assert(true.to!float == 1.0);
assert(true.to!double == 1.0);
assert(true.to!ubyte == 1);
assert(true.to!byte == 1);
assert(true.to!ushort == 1);
assert(true.to!short == 1);
assert(true.to!uint == 1);
assert(true.to!int == 1);
assert(false.to!float == 0);
assert(false.to!double == 0);
assert(false.to!ubyte == 0);
assert(false.to!byte == 0);
assert(false.to!ushort == 0);
assert(false.to!short == 0);
assert(false.to!uint == 0);
assert(false.to!int == 0);
}
/**
* Converts $(D_PARAM From) to a $(D_PSYMBOL String).
*
* Params:
* From = Source type.
* To = Target type.
* from = Source value.
*
* Returns: $(D_PARAM from) converted to $(D_PSYMBOL String).
*/
To to(To, From)(auto ref From from)
if (is(Unqual!To == String))
{
return format!"{}"(from);
}
///
@nogc nothrow pure @safe unittest
{
assert(true.to!String == "true");
assert(false.to!String == "false");
}
@nogc nothrow pure @safe unittest
{
static assert(is(typeof((const String("true")).to!bool)));
static assert(is(typeof(false.to!(const String) == "false")));
}

72
source/tanya/format/conv.d
View File

@@ -160,6 +160,7 @@ if (isIntegral!From
*
* Throws: $(D_PSYMBOL ConvException) if $(D_PARAM from) isn't convertible.
*/
deprecated("Use tanya.conv.to instead")
To to(To, From)(From from)
if (isNumeric!From && is(Unqual!To == bool) && !is(Unqual!To == Unqual!From))
{
@@ -180,25 +181,8 @@ if (isNumeric!From && is(Unqual!To == bool) && !is(Unqual!To == Unqual!From))
"Positive number overflow");
}
///
@nogc pure @safe unittest
{
assert(!0.0.to!bool);
assert(0.2.to!bool);
assert(0.5.to!bool);
assert(1.0.to!bool);
assert(!0.to!bool);
assert(1.to!bool);
}
@nogc pure @safe unittest
{
assertThrown!ConvException(&to!(bool, int), -1);
assertThrown!ConvException(&to!(bool, int), 2);
}
/// ditto
deprecated("Use tanya.conv.to instead")
To to(To, From)(auto ref const From from)
if ((is(From == String) || isSomeString!From) && is(Unqual!To == bool))
{
@@ -214,21 +198,6 @@ if ((is(From == String) || isSomeString!From) && is(Unqual!To == bool))
"String doesn't contain a boolean value");
}
///
@nogc pure @safe unittest
{
assert("true".to!bool);
assert(!"false".to!bool);
assert(String("true").to!bool);
assert(!String("false").to!bool);
}
@nogc pure @safe unittest
{
assertThrown!ConvException(() => "1".to!bool);
}
/**
* Converts a boolean to $(D_PARAM To).
*
@@ -245,54 +214,21 @@ if ((is(From == String) || isSomeString!From) && is(Unqual!To == bool))
*
* Returns: $(D_PARAM from) converted to $(D_PARAM To).
*/
deprecated("Use tanya.conv.to instead")
To to(To, From)(const From from)
if (is(Unqual!From == bool) && isNumeric!To && !is(Unqual!To == Unqual!From))
{
return from;
}
///
@nogc nothrow pure @safe unittest
{
assert(true.to!float == 1.0);
assert(true.to!double == 1.0);
assert(true.to!ubyte == 1);
assert(true.to!byte == 1);
assert(true.to!ushort == 1);
assert(true.to!short == 1);
assert(true.to!uint == 1);
assert(true.to!int == 1);
assert(false.to!float == 0);
assert(false.to!double == 0);
assert(false.to!ubyte == 0);
assert(false.to!byte == 0);
assert(false.to!ushort == 0);
assert(false.to!short == 0);
assert(false.to!uint == 0);
assert(false.to!int == 0);
}
/// ditto
deprecated("Use tanya.conv.to instead")
To to(To, From)(const From from)
if (is(Unqual!From == bool) && is(Unqual!To == String))
{
return String(from ? "true" : "false");
}
///
@nogc nothrow pure @safe unittest
{
assert(true.to!String == "true");
assert(false.to!String == "false");
}
@nogc nothrow pure @safe unittest
{
static assert(is(typeof((const String("true")).to!bool)));
static assert(is(typeof(false.to!(const String) == "false")));
}
/**
* Converts a floating point number to an integral type.
*