Auto Increment & Decrement Expressions

The expression syntax, semantics, associativity and precedence are quite identical to the corresponding C and C++ expressions. The operand must be an initialized left value of type integer, char or float. In case of the operand is a char atom, the result type is an integer. Otherwise, the result type is the type of the operand.

General Information
Operators	++
	-
Type	unary
Syntaxes	expr -
	expr ++
	++expr
	-expr
Operand Type	leftvalue of type integer, char or float.
Result Type	see following table
Functions	expr - : post-decrementation
	expr ++ : post-incrementation
	++expr : pre-incrementation
	-expr : pre-incrementation

Possible Operand Combinations
operand type	result type
integer	integer
float	float
char	integer

Expression Examples
expression	result
a := 1; a++	1	initially a equals 1; the result of the evaluation is 1 but after the evaluation, a equals 2
-a	0
a++	0	a equals 1 after the evaluation