gcc/m2/gm2-libs-iso/CharClass.def

   1 (* Library module defined by the International Standard
   2    Information technology - programming languages
   3    BS ISO/IEC 10514-1:1996E Part 1: Modula-2, Base Language.
   4
   5    Copyright ISO/IEC (International Organization for Standardization
   6    and International Electrotechnical Commission) 1996-2021.
   7
   8    It may be freely copied for the purpose of implementation (see page
   9    707 of the Information technology - Programming languages Part 1:
  10    Modula-2, Base Language.  BS ISO/IEC 10514-1:1996).  *)
  11
  12 DEFINITION MODULE CharClass;
  13
  14   (* Classification of values of the type CHAR *)
  15
  16 PROCEDURE IsNumeric (ch: CHAR): BOOLEAN;
  17   (* Returns TRUE if and only if ch is classified as a numeric character *)
  18
  19 PROCEDURE IsLetter (ch: CHAR): BOOLEAN;
  20   (* Returns TRUE if and only if ch is classified as a letter *)
  21
  22 PROCEDURE IsUpper (ch: CHAR): BOOLEAN;
  23   (* Returns TRUE if and only if ch is classified as an upper case letter *)
  24
  25 PROCEDURE IsLower (ch: CHAR): BOOLEAN;
  26   (* Returns TRUE if and only if ch is classified as a lower case letter *)
  27
  28 PROCEDURE IsControl (ch: CHAR): BOOLEAN;
  29   (* Returns TRUE if and only if ch represents a control function *)
  30
  31 PROCEDURE IsWhiteSpace (ch: CHAR): BOOLEAN;
  32   (* Returns TRUE if and only if ch represents a space character or a format effector *)
  33
  34 END CharClass.
  35