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parse

std conv

The parse family of functions works quite like the to family, except that:

  1. It only works with character ranges as input.
  2. It takes the input by reference. (This means that rvalues - such as string literals - are not accepted: use to instead.)
  3. It advances the input to the position following the conversion.
  4. It does not throw if it could not convert the entire input.

This overload converts a character input range to a bool.

  1. Target parse(Source source)
    Target
    parse
    (
    Target
    Source
    )
    (
    ref Source source
    )
    if (
    isInputRange!Source &&
    isSomeChar!(ElementType!Source)
    &&
    is(immutable Target == immutable bool)
    )
  2. Target parse(Source s)
  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 type to convert to

source Source

the lvalue of an input range

Return Value

Type: Target

A bool

Throws

A ConvException if the range does not represent a bool.

Note: All character input range conversions using to are forwarded to parse and do not require lvalues.

Examples

auto s = "true";
bool b = parse!bool(s);
assert(b);

Meta

Source

See Implementation

std conv classesfunctionstemplates
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