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 | ||
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==Description== | ==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: | + | 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: |
| + | |||
<pre>Assertion failed on line <#> of | <pre>Assertion failed on line <#> of | ||
procedure <prg>.</pre> | procedure <prg>.</pre> | ||
| + | |||
The dialog has four buttons, offering the following options: | The dialog has four buttons, offering the following options: | ||
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|Ignore||Continues program execution. | |Ignore||Continues program execution. | ||
|- | |- | ||
| − | |Ignore All||Continues program execution and | + | |Ignore All||Continues program execution and issues SET ASSERTS OFF, causing subsequent asserts to be ignored. |
|- | |- | ||
|} | |} | ||
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procedure proc1 | 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> | ||
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==Products== | ==Products== | ||
| − | Recital | + | Recital |
[[Category:Documentation]] | [[Category:Documentation]] | ||
[[Category:Commands]] | [[Category:Commands]] | ||
| + | [[Category:Error Handling and Debugging]] | ||
| + | [[Category:Error Handling and Debugging Commands]] | ||
Latest revision as of 10:07, 27 July 2010
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 issues 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
