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15.3.30 GCC internal Format Strings ¶

These format strings are used inside the GCC sources. In such a format string, a directive starts with ‘%’, is optionally followed by a size specifier ‘l’ or ‘ll’ or ‘w’ or ‘z’ or ‘t’, an optional flag ‘q’ (indicates quotes), another optional flag ‘+’, another optional flag ‘#’, and is finished by a specifier:

• ‘%’ denotes a literal percent sign,
• ‘<’ denotes an opening quote,
• ‘>’ or ‘'’ denotes a closing quote,
• ‘r’ denotes the beginning of a colored text segment,
• ‘R’ denotes the end of a colored text segment,
• ‘{’ denotes the beginning of a clickable text segment,
• ‘}’ denotes the end of a clickable text segment,
• ‘c’ denotes a character,
• ‘s’ denotes a string,
• ‘i’ and ‘d’ denote an integer,
• ‘o’, ‘u’, ‘x’ denote an unsigned integer,
• ‘f’ denotes a floating-point number,
• ‘.*s’ denotes a string preceded by a width specification,
• ‘D’ denotes a general declaration,
• ‘E’ denotes an expression,
• ‘F’ denotes a function declaration,
• ‘T’ denotes a type,
• ‘A’ denotes a function argument,
• ‘H’ denotes the first type in a type difference,
• ‘I’ denotes the second type in a type difference,
• ‘O’ denotes a binary operator,
• ‘P’ denotes a function parameter index,
• ‘Q’ denotes an assignment operator,
• ‘S’ denotes a substitution,
• ‘X’ denotes an exception,
• ‘V’ or ‘v’ denotes a list of const/volatile qualifiers,
• ‘C’ denotes a tree code or the current locus,
• ‘L’ denotes a programming language or a locus,
• ‘p’, ‘@’, ‘e’ denote various other types of compiler-internal objects,
• ‘Z’ denotes an array of integers.