2.5 Character Literals
A character_literal is formed by enclosing a graphic character between two apostrophe characters.
character_literal ::= 'graphic_character'
4 A character_literal is an enumeration literal of a character type. See 3.5.2.
Examples of character literals:
'A' '*' ''' ' '
Copyright © 1992,1993,1994,1995 Intermetrics, Inc.
Copyright © 2000 The MITRE Corporation, Inc. Ada Reference Manual