User manual

178
mikoC PRO for PIC32
MikroElektronika
Tokens
Token is the smallest element of a C program that compiler can recognize. The parser separates tokens from the input
stream by creating the longest token possible using the input characters in a left–to–right scan.
The mikroC PRO for PIC32 recognizes the following kinds of tokens:
- keywords
- identiers
- constants
- operators
- punctuators (also known as separators)
Tokens can be concatenated (pasted) by means of the preprocessor operator ##. See the Preprocessor Operators for
details.
Token Extraction Example
Here is an example of token extraction. Take a look at the following example code sequence:
inter = a+++b;
First, note that inter would be parsed as a single identier, rather than as the keyword int followed by the identier
er.
The programmer who has written the code might have intended to write inter = a + (++b), but it wouldn’t work
that way. The compiler would parse it into the seven following tokens:
inter // variable identier
= // assignment operator
a // variable identier
++ // postincrement operator
+ // addition operator
b // variable identier
; // statement terminator
Note that +++ parses as ++ (the longest token possible) followed by +.
According to the operator precedence rules, our code sequence is actually:
inter (a++)+b;