FormatSpec

toString string toString()
void toString(OutputRange writer): Gives a string containing all of the member variables on their own line.
writeUpToNextSpec bool writeUpToNextSpec(OutputRange writer): Write the format string to an output range until the next format specifier is found and parse that format specifier.

Variables

DYNAMIC enum int DYNAMIC;: Special value for width and precision. DYNAMIC width or precision means that they were specified with '*' in the format string and are passed at runtime through the varargs.
UNSPECIFIED enum int UNSPECIFIED;: Special value for precision, meaning the format specifier contained no explicit precision.
flDash bool flDash;: The format specifier contained a '-' (printf compatibility).
flHash bool flHash;: The format specifier contained a '#' (printf compatibility).
flPlus bool flPlus;: The format specifier contained a '+' (printf compatibility).
flSeparator bool flSeparator;: The format specifier contained a ','
flSpace bool flSpace;: The format specifier contained a ' ' (printf compatibility).
flZero bool flZero;: The format specifier contained a '0' (printf compatibility).
indexEnd ubyte indexEnd;: Index of the last argument for positional parameter range, from 1 to ubyte.max. (0 means not used).
indexStart ubyte indexStart;: Index of the argument for positional parameters, from 1 to ubyte.max. (0 means not used).
nested const(Char)[] nested;: In case of a compound format specifier starting with "%$(LPAREN)" and ending with "%$(RPAREN)", _nested contains the string contained within the two separators.
precision int precision;: Precision. Its semantics depends on the argument type. For floating point numbers, precision dictates the number of decimals printed.
sep const(Char)[] sep;: In case of a compound format specifier, _sep contains the string positioning after "%|". sep is null means no separator else sep.empty means 0 length separator.
separatorChar dchar separatorChar;: Character to insert between digits.
separatorCharPos int separatorCharPos;: Set to DYNAMIC when the separator character is supplied at runtime.
separators int separators;: Number of digits printed between separators.
spec char spec;: The actual format specifier, 's' by default.
trailing const(Char)[] trailing;: _trailing contains the rest of the format string.
width int width;: Minimum width, default 0.

Examples

1 import std.array;
2 auto a = appender!(string)();
3 auto fmt = "Number: %6.4e\nString: %s";
4 auto f = FormatSpec!char(fmt);
5 
6 assert(f.writeUpToNextSpec(a) == true);
7 
8 assert(a.data == "Number: ");
9 assert(f.trailing == "\nString: %s");
10 assert(f.spec == 'e');
11 assert(f.width == 6);
12 assert(f.precision == 4);
13 
14 assert(f.writeUpToNextSpec(a) == true);
15 
16 assert(a.data == "Number: \nString: ");
17 assert(f.trailing == "");
18 assert(f.spec == 's');
19 
20 assert(f.writeUpToNextSpec(a) == false);
21 assert(a.data == "Number: \nString: ");

FormatSpec

Constructors

Members

Functions

Variables

Examples

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