Folks
I want to write a template containing a conditional expansion for a
multi-valued attribute that does one thing if the attribute is singleton and
another if there are more than 1 element
For example, in an ANTLR grammar with ST output
rule
: FOO (bars+=bar)+ -> foo(args={$bars})
;
where the template looks like
foo(args) ::= <<
<if(???)>
something
<else>
something else
<endif>
>>
I want some expression for ??? to test for args being singleton.
Is this possible in ST3? Else I imagine I could write:
rule
: FOO (bars+=bar)+ -> foo(args={$bars},singleton={$bars.size() == 1})
;
and
foo(args,singleton) ::= <<
<if(singleton)>
something with args
<else>
something else with args
<endif>
>>
... but I would really rather not.
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