Exception Handling

Exception Handling (Error Runtime Handling)

An exception is an error occurs in the runtime (the excution) of program. The CGScript language uses the try/catch statement and the throw expression to implement the exception handling.

Syntax

try-catch statement

try {
   // codes that could throw an exception
}
catch (exception) {
   // codes that execute when exception-declaration is thrown in the try block
}
[catch (exception) {
   // code that handles another exception type
} ] . . . ]

• The exception can be any objects (E.g. Exception object, Number object, Array object, String object...)

throw expression

throw [expression]

• The expression can be any objects (E.g. Exception object, Number object, Array object, String object...)
• If throw is used without the expression, it will be re-throw.