Difference between revisions of "ASSERT"
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==Purpose== | ==Purpose== | ||
Display a message dialog with options when a condition evaluates to False | Display a message dialog with options when a condition evaluates to False | ||
Revision as of 10:28, 23 October 2009
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
