Item12893: Nested DEFAULT default Macro parameter expansion

CASE 1

• Set Test = "%arg{default="%DEFAULT{default="Y"}%"}%"

%Test%%BR%
%Test{"X"}%%BR%
%Test{arg="X"}%%BR%

What I would expect:

"Y"
"X"
"X"

What I'm getting:

"Y"
"X"
"Y"

My guess is that the default from the fragment:

%DEFAULT{default="Y"

is being picked up and used to satisfy the:

%arg{default=

-- JohnHart - 08 May 2014

You were almost right, but it was a little bit more complicated than that. What was happening was the code that is supposed to handle the inner expansion of a preference was not handling the default= parameter to the DEFAULT tag correctly, and it would not handle this corner case correctly. I fixed it in the 1.2.0 codebase.

Glad that someone is pushing this code; it's the only way we find this sort of problem.

-- CrawfordCurrie - 09 May 2014

Very cool - thanks - my first tiny contribution - BTW {I neglected to mention this in my orginal post) inverting the nesting produces a variation of this behavior (my suspicion is that the fix you've already made covers this alternate case)

CASE 2

• Set Test = "%DEFAULT{default="%arg{default="Y"}%"}%"

%Test%%BR%
%Test{"X"}%%BR%
%Test{arg="X"}%%BR%

What I would expect:

"Y"
"X"
"X"

What I'm getting:

"Y"
"Y"
"X"

-- JohnHart - 09 May 2014

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