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https://issues.apache.org/jira/browse/VELOCITY-587?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jon Seymour updated VELOCITY-587:
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Description:
The VTL doesn't currently provide a way to express strings containing a single
backslash (\)
#set($backslash="\")
results in a lexical error during template parsing.
#set($backslash="\\")
results in $backslash being assigned a string containing two backslashes (\\)
It appears the only workaround available now is to construct a variable
containing just a single backslash with this idiom:
#set($twobackslashes="\\")
#set($backslash=$twobackslashes.substring(0,1))
Even if this can't be fixed in the parser, the documentation should be updated
to define a preferred idiom for obtaining a string containing a single
backslash.
jon.
note: this issue partially duplicates a comment by Guido Deinhammer on issue
#454 regarding other escaping issues. I have raised a separate issue, so that
this one can be addressed separately, if desired.
was:
The VTL doesn't currently provide a way to express strings containing a single
backslash (\)
#(set $backslash="\")
results in a lexical error during template parsing.
#(set $backslash="\\")
results in $backslash being assigned a string containing two backslashes (\\)
It appears the only workaround available now is to construct a variable
containing just a single backslash with this idiom:
#(set $twobackslashes="\\")
#(set $backslash=$twobackslashes.substring(0,1))
Even if this can't be fixed in the parser, the documentation should be updated
to define a preferred idiom for obtaining a string containing a single
backslash.
jon.
note: this issue partially duplicates a comment by Guido Deinhammer on issue
#454 regarding other escaping issues. I have raised a separate issue, so that
this one can be addressed separately, if desired.
Fixed syntax errors in the examples. e.g. #(set => #set(
> The VTL does not have a trivial construction for strings containing a single
> backslash (\)
> ------------------------------------------------------------------------------------------
>
> Key: VELOCITY-587
> URL: https://issues.apache.org/jira/browse/VELOCITY-587
> Project: Velocity
> Issue Type: Bug
> Reporter: Jon Seymour
> Priority: Minor
>
> The VTL doesn't currently provide a way to express strings containing a
> single backslash (\)
> #set($backslash="\")
> results in a lexical error during template parsing.
> #set($backslash="\\")
> results in $backslash being assigned a string containing two backslashes (\\)
> It appears the only workaround available now is to construct a variable
> containing just a single backslash with this idiom:
> #set($twobackslashes="\\")
> #set($backslash=$twobackslashes.substring(0,1))
> Even if this can't be fixed in the parser, the documentation should be
> updated to define a preferred idiom for obtaining a string containing a
> single backslash.
> jon.
> note: this issue partially duplicates a comment by Guido Deinhammer on issue
> #454 regarding other escaping issues. I have raised a separate issue, so that
> this one can be addressed separately, if desired.
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