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parse

std conv

Parses a character input range to an integral value.

  1. Target parse(Source source)
  2. Target parse(Source s)
    Target
    parse
    (
    Target
    Source
    )
    (
    ref Source s
    )
    if (
    isSomeChar!(ElementType!Source) &&
    isIntegral!Target
    &&
    !is(Target == enum)
    )
  3. Target parse(Source source, uint radix)
  4. Target parse(Source s)
  5. Target parse(Source source)
  6. Target parse(Source s)
  7. Target parse(Source s)
  8. Target parse(Source s)
  9. Target parse(Source s, dchar lbracket, dchar rbracket, dchar comma)
  10. Target parse(Source s, dchar lbracket, dchar rbracket, dchar comma)
  11. Target parse(Source s, dchar lbracket, dchar rbracket, dchar keyval, dchar comma)

Parameters

Target

the integral type to convert to

s Source

the lvalue of an input range

Return Value

Type: Target

A number of type Target

Throws

A ConvException If an overflow occurred during conversion or if no character of the input was meaningfully converted.

Examples

string s = "123";
auto a = parse!int(s);
assert(a == 123);

// parse only accepts lvalues
static assert(!__traits(compiles, parse!int("123")));
import std.string : tr;
string test = "123 \t  76.14";
auto a = parse!uint(test);
assert(a == 123);
assert(test == " \t  76.14"); // parse bumps string
test = tr(test, " \t\n\r", "", "d"); // skip ws
assert(test == "76.14");
auto b = parse!double(test);
assert(b == 76.14);
assert(test == "");

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Source

See Implementation

std conv classesfunctionstemplates
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