EDOBE XDOM TAKE 6 IR - PRODUCTSHEET Especificações descarregar pdf (Página 236)

CHAPTER 8: ExtendScript Tools and Features Operator overloading 236

You can override the following operators:

X The operators > and >= are implemented by executing NOT operator <= and NOT operator <.

X Combined assignment operators such as *= are not supported.

All operator overload implementations must return the result of the operation. To perform the default

operation, return

undefined.

Unary operator functions work on the

this object, while binary operators work on the this object and

the first argument. The + and - operators have both unary and binary implementations. If the first

argument is undefined, the operator is unary; if it is supplied, the operator is binary.

For binary operators, a second argument indicates the order of operands. For noncommutative operators,

either implement both order variants in your function or return

undefined for combinations that you do

not support. For example:

this ["/"] = function (operand, rev) {

if (rev) {

// do not resolve operand / this

return;

} else {

// resolve this / operand

return this.value / operand;

}

Unary

+, -

Binary

+, -

*, /, %, ^

<, <=, ==

<<, >>, >>>

&, |, ===

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EDOBE XDOM TAKE 6 IR - PRODUCTSHEET Especificações Página 236