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Posted to dev@ant.apache.org by bu...@apache.org on 2004/06/03 12:32:59 UTC
DO NOT REPLY [Bug 29347] -
Nested property expansion shouldn't occur but does
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http://issues.apache.org/bugzilla/show_bug.cgi?id=29347
Nested property expansion shouldn't occur but does
------- Additional Comments From j_a_fernandez@yahoo.com 2004-06-03 10:32 -------
Well, the whole reason for not having nested property expansion is that the
parser does not do recursive nesting of brakets, which means that it cannot
detect that you are in a nested situation. It it were able to detect the case,
then I am almost certain we would allow nested expansion instead forbid it.
Looking at your example, you have:
${${a}.${b}}
the syntax for a property is: <prop> --> '${' <name>'}' and <name> --> [^}]*
which means the above gets interpreted as:
'${' "${a" '}' '.' '${' "b" '}' '}'
- property "${a" does not exist so it is printed out textually
- property "b" does exists, hence it is expanded
If we change this to understand recursion, we may as well do nested expansions.
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