[jira] Created: (TAPESTRY-2509) Add type coercions from String to Renderable, Block

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Add type coercions from String to Renderable, Block
---------------------------------------------------

                 Key: TAPESTRY-2509
                 URL: https://issues.apache.org/jira/browse/TAPESTRY-2509
             Project: Tapestry
          Issue Type: New Feature
          Components: tapestry-core
    Affects Versions: 5.0.13
            Reporter: Howard M. Lewis Ship
            Priority: Minor


Having a String to Block coercion would allow the following to be equivalent (excluding minor whitespace issues):

<t:if test="stuff">
    ${stuff}
   <t:parameter name="else">No stuff to display.
</t:if>

-and-

<t:if test="stuff" else="No stuff to display">
  ${stuff}
</t:if>


This could also be implemented as String -> Renderable and Renderable -> Block; this would allow (for example) a lone component to be passed to a component parameter of type Block.

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Great


在 Thu, 10 Jul 2008 06:55:31 +0800，Howard M. Lewis Ship (JIRA)  
<dev@...> 写道:

> Add type coercions from String to Renderable, Block
> ---------------------------------------------------
>
>                  Key: TAPESTRY-2509
>                  URL: https://issues.apache.org/jira/browse/TAPESTRY-2509
>              Project: Tapestry
>           Issue Type: New Feature
>           Components: tapestry-core
>     Affects Versions: 5.0.13
>             Reporter: Howard M. Lewis Ship
>             Priority: Minor
>
>
> Having a String to Block coercion would allow the following to be  
> equivalent (excluding minor whitespace issues):
>
> <t:if test="stuff">
>     ${stuff}
>    <t:parameter name="else">No stuff to display.
> </t:if>
>
> -and-
>
> <t:if test="stuff" else="No stuff to display">
>   ${stuff}
> </t:if>
>
>
> This could also be implemented as String -> Renderable and Renderable ->  
> Block; this would allow (for example) a lone component to be passed to a  
> component parameter of type Block.
>

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    [ https://issues.apache.org/jira/browse/TAPESTRY-2509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12612381#action_12612381 ]

Renat Zubairov commented on TAPESTRY-2509:
------------------------------------------

Will the following case also work?

<t:if test="stuff" else="message:nothing-to-display">
${stuff}
</t:if>

> Add type coercions from String to Renderable, Block
> ---------------------------------------------------
>
>                 Key: TAPESTRY-2509
>                 URL: https://issues.apache.org/jira/browse/TAPESTRY-2509
>             Project: Tapestry
>          Issue Type: New Feature
>          Components: tapestry-core
>    Affects Versions: 5.0.13
>            Reporter: Howard M. Lewis Ship
>            Priority: Minor
>
> Having a String to Block coercion would allow the following to be equivalent (excluding minor whitespace issues):
> <t:if test="stuff">
>     ${stuff}
>    <t:parameter name="else">No stuff to display.
> </t:if>
> -and-
> <t:if test="stuff" else="No stuff to display">
>   ${stuff}
> </t:if>
> This could also be implemented as String -> Renderable and Renderable -> Block; this would allow (for example) a lone component to be passed to a component parameter of type Block.

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    [ https://issues.apache.org/jira/browse/TAPESTRY-2509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12612529#action_12612529 ]

Howard M. Lewis Ship commented on TAPESTRY-2509:
------------------------------------------------

Of course, it's all about the type coercion.  It provides a lot of functionality for free, if you "prime the pump" with a few well selected coercions.

> Add type coercions from String to Renderable, Block
> ---------------------------------------------------
>
>                 Key: TAPESTRY-2509
>                 URL: https://issues.apache.org/jira/browse/TAPESTRY-2509
>             Project: Tapestry
>          Issue Type: New Feature
>          Components: tapestry-core
>    Affects Versions: 5.0.13
>            Reporter: Howard M. Lewis Ship
>            Priority: Minor
>
> Having a String to Block coercion would allow the following to be equivalent (excluding minor whitespace issues):
> <t:if test="stuff">
>     ${stuff}
>    <t:parameter name="else">No stuff to display.
> </t:if>
> -and-
> <t:if test="stuff" else="No stuff to display">
>   ${stuff}
> </t:if>
> This could also be implemented as String -> Renderable and Renderable -> Block; this would allow (for example) a lone component to be passed to a component parameter of type Block.

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     [ https://issues.apache.org/jira/browse/TAPESTRY-2509?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Howard M. Lewis Ship closed TAPESTRY-2509.
------------------------------------------

       Resolution: Fixed
    Fix Version/s: 5.0.15
         Assignee: Howard M. Lewis Ship

> Add type coercions from String to Renderable, Block
> ---------------------------------------------------
>
>                 Key: TAPESTRY-2509
>                 URL: https://issues.apache.org/jira/browse/TAPESTRY-2509
>             Project: Tapestry
>          Issue Type: New Feature
>          Components: tapestry-core
>    Affects Versions: 5.0.13
>            Reporter: Howard M. Lewis Ship
>            Assignee: Howard M. Lewis Ship
>            Priority: Minor
>             Fix For: 5.0.15
>
>
> Having a String to Block coercion would allow the following to be equivalent (excluding minor whitespace issues):
> <t:if test="stuff">
>     ${stuff}
>    <t:parameter name="else">No stuff to display.
> </t:if>
> -and-
> <t:if test="stuff" else="No stuff to display">
>   ${stuff}
> </t:if>
> This could also be implemented as String -> Renderable and Renderable -> Block; this would allow (for example) a lone component to be passed to a component parameter of type Block.

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