Member predicate FormatLiteral :: getFormatArgumentIndexFor
Gets the computed format argument index for the nth conversion specifier of this
format string (if mode = 2), it’s minimum field width (if mode = 0) or it’s
precision (if mode = 1). Has no result if that element is not present. Does
not account for positional arguments ($).
int
getFormatArgumentIndexFor
(
int
n
,
int
mode
)