CC78K4 Datasheet, PDF (37/523 Pages) NEC – CC78K4 Ver.2.30 or Later, C Compiler Language

CHAPTER 2 CONSTRUCTS OF C LANGUAGE
2.3 Identifiers
An identifier is the name given to the following variables.
Function
Object
Tag of structure, union, or enumeration type
Member of structure, union, or enumeration type
typedef name
Label name
Macro name
Macro parameter
Each identifier can consist of uppercase letters, lowercase letters, or numeric characters including underscores.
The following characters can be used as identifiers.
There is no restriction on the maximum length of the identifier. In this compiler, however, only the first 249
characters can be identified (refer to Table 1-1 Maximum Performance Characteristics of This C Compiler).
_(underscore) a b c d e f g h i j k l m
nopqrstuvwxyz
ABCDEF GHIJKLM
NOPQRS TUVWXYZ
0123456789
All identifiers must begin with other than a numerical character (namely, a letter or an underscore) and must not
be the same as any keyword.
2.3.1 Scope of identifiers
The range of an identifier within which its use becomes effective is determined by the location at which the
identifier is declared. The scope of identifiers is divided into the following four types.
Function scope
File scope
Block scope
Function prototype scope
User’s Manual U15556EJ1V0UM
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