Difference between revisions of "ASSERT"
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==Class== | ==Class== | ||
Error Handling and Debugging | Error Handling and Debugging | ||
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<code lang="recital"> | <code lang="recital"> | ||
set asserts on | set asserts on | ||
| + | |||
| + | procedure proc1 | ||
| + | |||
parameters para1, para2, para3 | parameters para1, para2, para3 | ||
assert pcount() = 3 message [3 parameters required] | assert pcount() = 3 message [3 parameters required] | ||
// code continues | // code continues | ||
| + | |||
return | return | ||
</code> | </code> | ||
Revision as of 14:22, 23 April 2009
Class
Error Handling and Debugging
Purpose
Display a message dialog with options when a condition evaluates to False
Syntax
ASSERT <expL> [MESSAGE <expC>]
See Also
DEBUG, SET ASSERTS, SET COMPILE
Description
The ASSERT command is used for program debugging purposes: to display a message dialog with options when a condition evaluates to False (.F.). The condition is specified in <expL>. An optional message can be specified using the MESSAGE <expC>clause. If no message is specified; the default message is:
Assertion failed on line <#> of
procedure <prg>.
The dialog has four buttons, offering the following options:
| Button | Option |
|---|---|
| Debug | Suspends program execution and starts the Debugger. The Debug option is only available if the program is being run uncompiled. |
| Cancel | Stops program execution. |
| Ignore | Continues program execution. |
| Ignore All | Continues program execution and issue SET ASSERTS OFF, causing subsequent asserts to be ignored. |
If SET ASSERTS is OFF, asserts are ignored. SET ASSERTS is OFF by default.
Example
set asserts on procedure proc1 parameters para1, para2, para3 assert pcount() = 3 message [3 parameters required] // code continues return
Products
Recital Mirage Server, Recital Terminal Developer
