How can I define a macro in different file and use it?

[Colbert Philippe <co...@rogers.com>]

I tried to define a simple macro in one file and using it in another macro file.  I attempted to do this using #parse.   This is an important functionality for programmers.

Defining a simpel macro in macrolibrary.vm
## This macro simply prints its 3 parameters separated by single space
#macro( myMacro $p1 $p2 $p3 )
$p1 $p2 $p3 
#end

Using it in separate file  usingmymacro.vm

#parse( "macrolibrary.vm" )

#myMacro( "alpha" "beta" "gamma" )

Output of running Velocity with my file usingmymacro.vm

#myMacro( "alpha" "beta" "gamma" )

It's as if it does not recognize the difinition of the macro that it parsed.   Has somebody ran into this problem?

Re: How can I define a macro in different file and use it?

[Markus Reinhardt <mr...@hygiene.uni-wuerzburg.de>]

Velocity Manual:


Colbert Philippe wrote:
> I tried to define a simple macro in one file and using it in another macro file.  I attempted to do this using #parse.   This is an important functionality for programmers.
>
> Defining a simpel macro in macrolibrary.vm
> ## This macro simply prints its 3 parameters separated by single space
> #macro( myMacro $p1 $p2 $p3 )
> $p1 $p2 $p3 
> #end
>
> Using it in separate file  usingmymacro.vm
>
> #parse( "macrolibrary.vm" )
>
> #myMacro( "alpha" "beta" "gamma" )
>
> Output of running Velocity with my file usingmymacro.vm
>
> #myMacro( "alpha" "beta" "gamma" )
>
> It's as if it does not recognize the difinition of the macro that it parsed.   Has somebody ran into this problem?
>
>
>
>
>
>
>
>   


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Re: How can I define a macro in different file and use it?

[Markus Reinhardt <mr...@hygiene.uni-wuerzburg.de>]

...I hit the wrong button :(

Velocity Manual:

*Velocimacro Properties*

Several lines in the |velocity.properties| file allow for flexible
implementation of Velocimacros. Note that these are also documented in
the Developer Guide
<http://jakarta.apache.org/velocity/docs/developer-guide.html>.

|velocimacro.library| - A comma-separated list of all Velocimacro
template libraries. By default, Velocity looks for a single library:
/VM_global_library.vm/. The configured template path is used to find the
Velocimacro libraries.
...

*Can I register Velocimacros via #parse() ? *

Currently, Velocimacros must be defined before they are first used in a
template. This means that your #macro() declarations should come before
using the Velocimacros.

This is important to remember if you try to #parse() a template
containing inline #macro() directives. Because the #parse() happens at
runtime, and the parser decides if a VM-looking element in the template
is a VM at parsetime, #parse()-ing a set of VM declarations won't work
as expected. To get around this, simply use the |velocimacro.library|
facility to have Velocity load your VMs at startup.
...

Hope this helps,

Markus



Colbert Philippe schrieb:
> I tried to define a simple macro in one file and using it in another macro file.  I attempted to do this using #parse.   This is an important functionality for programmers.
>
> Defining a simpel macro in macrolibrary.vm
> ## This macro simply prints its 3 parameters separated by single space
> #macro( myMacro $p1 $p2 $p3 )
> $p1 $p2 $p3 
> #end
>
> Using it in separate file  usingmymacro.vm
>
> #parse( "macrolibrary.vm" )
>
> #myMacro( "alpha" "beta" "gamma" )
>
> Output of running Velocity with my file usingmymacro.vm
>
> #myMacro( "alpha" "beta" "gamma" )
>
> It's as if it does not recognize the difinition of the macro that it parsed.   Has somebody ran into this problem?
>
>
>
>
>
>
>
>