[Bug 55792] EL expression containing a map is not parsed correctly. '}' is interpreted as closing brace of the EL expression.

[bu...@apache.org]

https://issues.apache.org/bugzilla/show_bug.cgi?id=55792

Konstantin Kolinko <kn...@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Collection literals not     |EL expression containing a
                   |recognized within stream    |map is not parsed
                   |lambda expression, result   |correctly. '}' is
                   |in syntax error             |interpreted as closing
                   |                            |brace of the EL expression.

--- Comment #2 from Konstantin Kolinko <kn...@gmail.com> ---
(For reference - discussion on users@ before filing this issue
http://tomcat.markmail.org/thread/mohw6qhaauez27h5

The only issue here is that '}' in declaration of a map is interpreted as
closing brace of EL expression.  I am changing TITLE accordingly.


Searching through Tomcat 8 sources, we have a similar test:
/test/webapp/el-misc.jsp

The code there is
<tags:echo echo='19-${{1,2,3,4}.stream().max().orElse(-1)}' />

The above works when EL is used in an attribute of a tag.
But when I move the EL expression into the body of the document, it starts to
fail. The following simple JSP fails
[[[
<%@page contentType="text/plain; charset=UTF-8"%>
${{1,2,3,4}.stream().max().orElse(-1)}
]]]

javax.el.ELException: Failed to parse the expression [${{1,2,3,4}]


For completeness, '}' in string literals is parsed correctly.
The following JSP does work
[[[
<%@page contentType="text/plain; charset=UTF-8"%>
${'}A'}B
${"}C"}D
]]]

It prints
}AB
}CD

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