std.int128

struct Int128;

128 bit signed integer type.

Cent data;

core.int128.Cent

pure nothrow @nogc @safe this(long lo);

Construct an Int128 from a long value. The upper 64 bits are formed by sign extension.

Parameters:

long lo

signed lower 64 bits

pure nothrow @nogc @safe this(ulong lo);

Construct an Int128 from a ulong value. The upper 64 bits are set to zero.

Parameters:

ulong lo

unsigned lower 64 bits

pure nothrow @nogc @safe this(long hi, long lo);

Construct an Int128 from a long value.

Parameters:

long hi	upper 64 bits
long lo	lower 64 bits

pure nothrow @nogc @safe this(Cent data);

Construct an Int128 from a Cent.

Parameters:

Cent data

Cent data

pure nothrow @nogc @safe size_t toHash() const;

Returns:

hash value for Int128

pure nothrow @nogc @safe bool opEquals(long lo) const;

Compare for equality

Parameters:

long lo

signed value to compare with

Returns:

true if Int128 equals value

pure nothrow @nogc @safe bool opEquals(ulong lo) const;

Compare for equality

Parameters:

ulong lo

unsigned value to compare with

Returns:

true if Int128 equals value

pure nothrow @nogc @safe bool opEquals(Int128 op2) const;

Compare for equality

Parameters:

Int128 op2

value to compare with

Returns:

true if Int128 equals value

Int128 opUnary(string op)() const
if (op == "+");

Support unary arithmentic operator +

Parameters:

op

"+"

Returns:

lvalue of result

Int128 opUnary(string op)() const
if (op == "-" || op == "~");

Support unary arithmentic operator - ~

Parameters:

op

"-", "~"

Returns:

lvalue of result

Int128 opUnary(string op)()
if (op == "++" || op == "--");

Support unary arithmentic operator ++ --

Parameters:

op	"++", "--"

Returns:

lvalue of result

bool opCast(T : bool)() const;

Support casting to a bool

Parameters:

T

bool

Returns:

true if value is not zero

T opCast(T : long)() const
if (is(byte : T));

Support casting to an integral type

Parameters:

T	integral type

Returns:

low bits of value reinterpreted as T

Examples:

const Int128 a = Int128(0xffff_ffff_ffff_ffffL, 0x0123_4567_89ab_cdefL);
writeln(cast(long)a); // 0x0123_4567_89ab_cdefL
writeln(cast(int)a); // 0x89ab_cdef
writeln(cast(byte)a); // cast(byte)0xef

T opCast(T : real)() const;

Support casting to floating point type

Parameters:

T	floating point type

Returns:

value cast to floating point with environment-dependent rounding if the value is not exactly representable

Examples:

const Int128 a = Int128(-1L << 60);
writeln(cast(double)a); // -(2.0^^60)
writeln(cast(double)(a * a)); // 2.0^^120

Int128 opBinary(string op)(Int128 op2) const
if (op == "+" || op == "-" || op == "*" || op == "/" || op == "%" || op == "&" || op == "|" || op == "^");

Int128 opBinary(string op, Int)(const Int op2) const
if ((op == "+" || op == "-" || op == "*" || op == "/" || op == "%" || op == "&" || op == "|" || op == "^") && is(Int : long) && __traits(isIntegral, Int));

Int128 opBinary(string op, IntLike)(auto ref IntLike op2) const
if ((op == "+" || op == "-" || op == "*" || op == "/" || op == "%" || op == "&" || op == "|" || op == "^") && is(IntLike : long) && !__traits(isIntegral, IntLike));

Int128 opBinaryRight(string op, Int)(const Int op2) const
if ((op == "+" || op == "-" || op == "*" || op == "/" || op == "%" || op == "&" || op == "|" || op == "^") && is(Int : long) && __traits(isIntegral, Int));

Int128 opBinaryRight(string op, IntLike)(auto ref IntLike op2) const
if ((op == "+" || op == "-" || op == "*" || op == "/" || op == "%" || op == "&" || op == "|" || op == "^") && is(IntLike : long) && !__traits(isIntegral, IntLike));

Int128 opBinary(string op)(long op2) const
if (op == "<<");

Int128 opBinary(string op)(long op2) const
if (op == ">>");

Int128 opBinary(string op)(long op2) const
if (op == ">>>");

Support binary arithmetic operators + - * / % & | ^ << >> >>>

Parameters:

op	one of the arithmetic binary operators
Int128 op2	second operand

Returns:

value after the operation is applied

ref Int128 opOpAssign(string op)(Int128 op2)
if (op == "+" || op == "-" || op == "*" || op == "/" || op == "%" || op == "&" || op == "|" || op == "^" || op == "<<" || op == ">>" || op == ">>>");

ref Int128 opOpAssign(string op, Int)(auto ref Int op2)
if ((op == "+" || op == "-" || op == "*" || op == "/" || op == "%" || op == "&" || op == "|" || op == "^" || op == "<<" || op == ">>" || op == ">>>") && is(Int : long));

arithmetic assignment operators += -= *= /= %= &= |= ^= <<= >>= >>>=

Parameters:

op	one of +, -, etc.
Int128 op2	second operand

Returns:

lvalue of updated left operand

pure nothrow @nogc @safe int opCmp(Int128 op2) const;

pure nothrow @nogc @safe int opCmp(Int)(const Int op2) const
if (is(Int : long) && __traits(isIntegral, Int));

int opCmp(IntLike)(auto ref IntLike op2) const
if (is(IntLike : long) && !__traits(isIntegral, IntLike));

support arithmentic comparison operators < <= > >=

Parameters:

Int128 op2

right hand operand

Returns:

-1 for less than, 0 for equals, 1 for greater than

void toString(Writer, FormatSpec)(ref scope Writer sink, ref scope const FormatSpec fmt) const;

Formats Int128 with either %d, %x, %X, or %s (same as %d).

Parameters:

Writer sink	Output range to write to.
FormatSpec fmt	A std.format.FormatSpec which controls how the number is displayed.

Throws:

std.format.FormatException if the format specifier is not one of 'd', 'x', 'X', 's'.

See Also:

std.format.formatValue

Examples:

toString is rarely directly invoked; the usual way of using it is via std.format.format:

import std.format : format;

writeln(format("%s", Int128.max)); // "170141183460469231731687303715884105727"
writeln(format("%s", Int128.min)); // "-170141183460469231731687303715884105728"
writeln(format("%x", Int128.max)); // "7fffffffffffffffffffffffffffffff"
writeln(format("%X", Int128.max)); // "7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
writeln(format("%032X", Int128(123L))); // "0000000000000000000000000000007B"
writeln(format("%+ 40d", Int128(123L))); // "                                    +123"
writeln(format("%+-40d", Int128(123L))); // "+123                                    "

Examples:

Also can format as wchar or dchar.

import std.conv : to;

writeln(to!wstring(Int128.max)); // "170141183460469231731687303715884105727"w
writeln(to!dstring(Int128.max)); // "170141183460469231731687303715884105727"d

enum Int128 min;

minimum value

enum Int128 max;

maximum value