axaptapedia: Exception handling

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Источник: http://www.axaptapedia.com/Exception_handling
==============

Summary: Added enums and example
<div>When execution a string of code, there is a risk that something may go wrong. Exception handling lets you handle system errors by your own code.


==Try and Catch==
If you are able to predict a block of code, where an exception will occur under certain circumstances, you can use the '''try''' command:


try
{
// Block of code that may fail
}
catch (exception::error)
{
// Do something about this error
}


==Retry==
If you enter '''Retry''' in the '''catch''' block the '''try''' block is executes once more, but be carefull as this can result in a never-ending loop.


==Catch enums==
{| border="1"
|-
!Enum (exception::)
!Description
|-
|Info
|
|-
|Warning
|
|-
|Deadlock
|
|-
|Error
|
|-
|Internal
|
|-
|Break
|
|-
|DDEerror
|
|-
|Sequence
|
|-
|Numeric
|
|-
|CLRError
|
|-
|CodeAccessSecurity
|
|-
|UpdateConflict
|
|-
|UpdateConflictNotRecovered
|}

==Example==


static void TryCatchTest(Args _args)
{
Map m = new Map(types::Integer, types::String);
str s;
int i;
;

m.insert(0,"Zero");
m.insert(1, "First");
m.insert(2, "Second");
m.insert(4, "Fourth");


for (i=0;i