Can the OSS ASN.1 compiler parse any macro?

The OSS ASN.1 Compiler can parse any macro instance (i.e., macro usage) provided that the macro definition precedes it. If the macro definition does not precede the macro instance then the parse is successful only if the ASN.1 is syntactically valid in the absence of the macro notation. For example, if you have:

MyModule DEFINITIONS ::= BEGIN
    foo OPERATION ::= globalValue : {1 2 3 4 5}
    bar OPERATION ::= localValue : 3
    Foo ::= OPERATION

OPERATION MACRO ::= BEGIN
.............
END

END

The OSS ASN.1 Compiler will successfully parse the macro instances for foo, bar and Foo although the macro definition OPERATION does not precede them. However, if you have:

YourModule DEFINITIONS ::= BEGIN

fooBar OPERATION
    ARGUMENT INTEGER
    RESULT BOOLEAN
::= globalValue: {1 2 3 4 5}

OPERATION MACRO ::= BEGIN
.............
END

END

the OSS ASN.1 Compiler will not be able to parse the macro instance fooBar because it is syntactically invalid ASN.1 in the absence of the macro notation and OPERATION is defined after fooBar. In such cases OPERATION must be defined before fooBar.

In all cases the OSS ASN.1 Compiler requires that the macro be defined, whether before or after the macro instance.


The samples included with some of the Knowledge Center answers are meant for your general understanding of the OSS products. Different versions of the products might produce slightly different outputs. Consult the products documentation and samples for the most up-to-date products information and code examples.



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