EXPRESSIONS

Postfix Decrement Operator

15.13.3

Otherwise, it is a qualified name of the form

Ename

.

Identifier

, where

Ename

is itself an

ExpressionName

, and the

ExpressionName

 is treated exactly as if it

had been the field access expression ( 15.10):

(

Ename

).

Identifier

containing a parenthesized expression ( 15.7.3).

15.13.2   Postfix Increment Operator

++

PostIncrementExpression:

PostfixExpression

 ++

A postfix expression followed by a

++

 operator is a postfix increment expres 

sion. The result of the postfix expression must be a variable of a numeric type, or a

compile time error occurs. The type of the postfix increment expression is the

type of the variable. The result of the postfix increment expression is not a vari 

able, but a value.

At run time, if evaluation of the operand expression completes abruptly, then

the postfix increment expression completes abruptly for the same reason and no

incrementation occurs. Otherwise, the value

1

 is added to the value of the variable

and the sum is stored back into the variable. Before the addition, binary numeric

promotion ( 5.6.2) is performed on the value

1

 and the value of the variable. If

necessary, the sum is narrowed by a narrowing primitive conversion ( 5.1.3) to

the type of the variable before it is stored. The value of the postfix increment

expression is the value of the variable

before

the new value is stored.

A variable that is declared

final

 cannot be incremented, because when an

access of a

final

 variable is used as an expression, the result is a value, not a

variable. Thus, it cannot be used as the operand of a postfix increment operator.

15.13.3   Postfix Decrement Operator

PostDecrementExpression:

PostfixExpression

A postfix expression followed by a

 operator is a postfix decrement expres 

sion. The result of the postfix expression must be a variable of a numeric type, or a

compile time error occurs. The type of the postfix decrement expression is the

type of the variable. The result of the postfix decrement expression is not a vari 

able, but a value.

At run time, if evaluation of the operand expression completes abruptly, then

the postfix decrement expression completes abruptly for the same reason and no

decrementation occurs. Otherwise, the value

1

 is subtracted from the value of the

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