gm2-libs-iso/CharClass

DEFINITION MODULE CharClass;

  (* Classification of values of the type CHAR *)

IsNumeric
PROCEDURE IsNumeric (ch: CHAR): BOOLEAN;
  (* Returns TRUE if and only if ch is classified as a numeric character *)

IsLetter
PROCEDURE IsLetter (ch: CHAR): BOOLEAN;
  (* Returns TRUE if and only if ch is classified as a letter *)

IsUpper
PROCEDURE IsUpper (ch: CHAR): BOOLEAN;
  (* Returns TRUE if and only if ch is classified as an upper case letter *)

IsLower
PROCEDURE IsLower (ch: CHAR): BOOLEAN;
  (* Returns TRUE if and only if ch is classified as a lower case letter *)

IsControl
PROCEDURE IsControl (ch: CHAR): BOOLEAN;
  (* Returns TRUE if and only if ch represents a control function *)

IsWhiteSpace
PROCEDURE IsWhiteSpace (ch: CHAR): BOOLEAN;
  (* Returns TRUE if and only if ch represents a space character or a format effector *)

END CharClass.