folly::format_value::formatNumber

Format a number in "val"; the first prefixLen characters form the prefix (sign, "0x" base prefix, etc) which must be left‐aligned if the alignment is Align::PAD_AFTER_SIGN. Treats Align::DEFAULT as Align::LEFT. Ignores arg.precision, as that has a different meaning for numbers (not "maximum field width")

Synopsis

Declared in <folly/Format.h>

template<class FormatCallback>
void
formatNumber(
    StringPiece val,
    int prefixLen,
    FormatArg& arg,
    FormatCallback& cb);

Parameters

Name

Description

val

The number, already rendered as text, to format.

prefixLen

The length of the leading prefix (sign, base marker, etc).

arg

The format argument describing alignment, padding, and width.

The callback that receives the formatted output.

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