HLASM: V1R6 Language Ref

Macro instruction formatparameters and operands (see ▌4▐ in Figure 31) do not affect this order.▌4▐┌─────────┴─────────┐MACRO ▌1▐ MIX &P1,&KEY1=A,&P2,&P3,&P4,&KEY2=,&P5. ¹ ² ³ ⁴ ⁵ ▌3▐..MEND─────────────────────────────────────────────────────────────────START 0... ₁ ₂ ₃ ₄ ₅ ▌3▐▌2▐ MIX KEY1=B,ONE,TWO,THREE,KEY2=33,FOUR,FIVE. . └─────────┬──────────┘. ▌4▐ENDSublists in operandsFigure 31. Combining positional and keyword parameters&SYSLIST(n): The system variable symbol &SYSLIST(n) refers only to thepositional operands in a macro instruction.You can use a sublist in a positional or keyword operand to specify several values.A sublist is a character string that consists of one or more entries separated bycommas and enclosed in parentheses.If the COMPAT(SYSLIST) assembler option is not specified, a variable symbol thathas been assigned a character string that consists of one or more entries separatedby commas and enclosed in parentheses is also treated as a sublist. However, if theCOMPAT(SYSLIST) assembler option is specified, a sublist assigned to a variablesymbol is treated as a character string, not as a sublist.A variable symbol is not treated as a sublist if the parentheses are not present. Thefollowing example shows two calls to macro MAC1. In the first call, the value of theoperand in variable &VAR1 is treated as a sublist. In the second call, the value of theoperand is treated as a character string, not a sublist, because the variable &VAR2does not include parentheses.&VAR1 SETC ’(1,2)’MAC1 KEY=&VAR1&VAR2 SETC ’1,2’MAC1 KEY=(&VAR2)To refer to an entry of a sublist code, use:v The corresponding symbolic parameter with an applicable subscript, orv The system variable symbol &SYSLIST with applicable subscripts, the first ofwhich refers to the positional operand, and the second to the sublist entry in theoperand. &SYSLIST can refer only to sublists in positional operands.Figure 32 on page 303 shows that the value specified in a positional or keywordoperand can be a sublist.302 HLASM: V1R6 Language Ref