[stringtemplate-interest] misc

[Brian Lewis]

group test;
null ::= ["x":, default:]
test() ::= <<
$
["field1", "field2", "field3", "field4", "field5", "field6"],
["label1", "label2", "label3", "label4", "label5", "label6"],
[""      , ""      , null.x  , null.x  , null.x  , ""      ],
["40"    , "40"    , "40"    , "40"    , null.x  , "40"    ] :
{name, label, required, size|
$name$, $label$, $required:{};null="null"$, $size:{};null="null"$
}
$
>>

1. What is the correct way to put null in a list?

2. The expected output was
field1, label1, , 40
field2, label2, , 40
field3, label3, null, 40
field4, label4, null, 40
field5, label5, null, null
field6, label6, , 40

but the actual output was
field1, label1, , 
field2, label2, , 
field3, label3, , 
field4, label4, null, 
field5, label5, null, 
field6, label6, null, null

Why?

3. I tried to iterate over a list of maps to save myself some repetitive
coding, but it seems as though you can't have a list of maps. Is that
correct?