[VELOCITY-961] Parsing regression in Velocity 2.3

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.3
• Component/s: Engine
• Assignee: Unassigned
• Reporter: Éamonn McManus
• Created: 03/Jan/23 19:25
• Updated: 03/Jan/23 19:26

Description

The following template parses correctly with Velocity 1.7:

$child.typeName()#if($child.isRepeated())[]#end

But with 2.3 it gets an exception:

org.apache.velocity.runtime.parser.TemplateParseException: Encountered "[" at velocityParsingBug[line 1, column 42]
Was expecting one of:
    "\u001c" ...
    "\u001c" ...
    "||" ...
    "|" ...
    "(" ...
    ")" ...
    <ESCAPE_DIRECTIVE> ...
    "]]#" ...
    <WHITESPACE> ...
    <NEWLINE> ...
    <SUFFIX> ...
    <STRING_LITERAL> ...
    <INTEGER_LITERAL> ...
    <FLOATING_POINT_LITERAL> ...
    <DOT> ...
    "{" ...
    "}" ...
    "\\\\" ...
    "\\" ...
    <TEXT> ...
    <INLINE_TEXT> ...
    <EMPTY_INDEX> ...
    "{" ...
    "\u001c" ...
    <WHITESPACE> ...
    <NEWLINE> ...        at org.apache.velocity.runtime.parser.StandardParser.parse(StandardParser.java:198)
        at org.apache.velocity.runtime.RuntimeInstance.parse(RuntimeInstance.java:1341)

I think the template is correct and should work with both versions.

I was able to work around the bug like this:

$set ($squares = '[]')
$child.typeName()#if($child.isRepeated())$squares#end