$ASSERTS: Difference between revisions
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* If this metacommand is in your program and any of the [[_ASSERT]] checks will fail, then the program will stop with an | * If this metacommand is in your program and any of the programmed [[_ASSERT]] checks will fail, then the program will stop with an ''_ASSERT failed'' error. | ||
* Detailed error messages passed to the [[_ASSERT]] statement will displayed in the console window, but only if [[$ASSERTS|$ASSERTS:CONSOLE]] is used. | * Detailed error messages passed to the [[_ASSERT]] statement will displayed in the console window, but only if [[$ASSERTS|$ASSERTS:CONSOLE]] is used. | ||
;Note: | ;Note: This metacommand is some kind of main switch to perform debug tests during developmet. Later just remove this metacommand to compile your program without debugging code, all the [[_ASSERT]] statements may remain in the code for later debugging sessions, they are simply ignored without this metacommand. | ||
Revision as of 22:59, 30 April 2022
This metacommand enables debug tests with the _ASSERT statement.
Syntax
Description
- If this metacommand is in your program and any of the programmed _ASSERT checks will fail, then the program will stop with an _ASSERT failed error.
- Detailed error messages passed to the _ASSERT statement will displayed in the console window, but only if $ASSERTS:CONSOLE is used.
- Note
- This metacommand is some kind of main switch to perform debug tests during developmet. Later just remove this metacommand to compile your program without debugging code, all the _ASSERT statements may remain in the code for later debugging sessions, they are simply ignored without this metacommand.
Availability
- QB64 2.1 and up (QB64 Team)
- QBPE 0.5 and up (QB64 Phoenix Edition)
Examples
- Example
- Adding test checks for parameter inputs in a function.
$ASSERTS:CONSOLE DO a = INT(RND * 10) b$ = myFunc$(a) PRINT a, , b$ _LIMIT 3 LOOP UNTIL _KEYHIT FUNCTION myFunc$ (value AS SINGLE) _ASSERT value > 0, "Value cannot be zero" _ASSERT value <= 10, "Value cannot exceed 10" IF value > 1 THEN plural$ = "s" myFunc$ = STRING$(value, "*") + STR$(value) + " star" + plural$ + " :-)" END FUNCTION |
See also