30 Localization library [localization]

30.4 Standard locale categories [locale.categories]

30.4.3 The numeric category [category.numeric] Class template num_put [locale.nm.put] Virtual functions [facet.num.put.virtuals]

Table 117: Fill padding [tab:facet.num.put.fill]
adjustfield == ios_base​::​left
pad after
adjustfield == ios_base​::​right
pad before
adjustfield == internal and a sign occurs in the representation
pad after the sign
adjustfield == internal and representation after stage 1 began with 0x or 0X
pad after x or X
pad before