#assert

Assembler directives: #assert
Pseudo instructions: #assert#assert <condition>
    .Assembler directives: #assert
Pseudo instructions: #assertassert <condition>

Assembler directives: #assert
Pseudo instructions: #assertAssert that the given condition is true.

This directive might be used to detect logical or overflow errors in your source. It is used by zasm itself to Assembler directives: #assert
Pseudo instructions: #assertassert that loaded library files actually defined the Pseudo instructions: Label definition
Numeric expressions: Labels
8080 Assembler: Labelslabel they promissed to define. It is also used in zasm's assembler test suite.

Example:

Assembler directives: #assert
Pseudo instructions: #assert#assert ( $ & 7 ) == 0      ; Assembler directives: #assert
Pseudo instructions: #assertassert that current code position
                            ; is a multiple of 8

.area GSINIT
.Assembler directives: #assert
Pseudo instructions: #assertassert DATA_size > 1       ; else ldir will run amok
 
ld  bc,DATA_size - 1
ld  de,DATA + 1
ld  hl,DATA
ld  (hl),0
ldir