7.5 ASSERT

FreeM Extension

Triggers error ASSERT if the supplied truth-valued expression tvexpr is false (1 is true, and 0 is false), and that the optional postcondition evaluates to true or is omitted.

The ASSERT error is catchable whether using standard-style, FreeM-style, or DSM 2.0-style error processing.

Syntax

 ASSERT:postcondition <tvexpr>

Example

USER> SET DEBUG=1


USER> ASSERT:DEBUG 1=1


USER> ASSERT:DEBUG 1=0
 
 
>> Error ZASSERT:  programmer assertion failed in SYSTEM::^%SYS.INIT  [$STACK = 0]
>> ASSERT:DEBUG 1=0
                   ^

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