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58 lines
2.2 KiB
Plaintext
58 lines
2.2 KiB
Plaintext
caption: Macro Calls
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created: 20150220182252000
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modified: 20230419103154328
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tags: WikiText Macros
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title: Macro Calls
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type: text/vnd.tiddlywiki
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!! Introduction
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This tiddler describes the different ways in which [[macros|Macros]] can be called.
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!! Macro Call Transclusion Shortcut
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To call a [[macro|Macros]], place `<<`double angle brackets`>>` around the name and any parameter values.
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```
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<<mymacro param:"This is the parameter value">>
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```
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By default, parameters are listed in the same order as in the macro's definition. A parameter can be labelled with its name and a colon to allow them to be listed in a different order.
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If no value is specified for a parameter, the default value given for that parameter in the [[macro definition|Macro Definitions]] is used instead. (If no default value was defined, the parameter is blank).
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Each parameter value can be enclosed in `'`single quotes`'`, `"`double quotes`"`, `"""`triple double quotes`"""` or `[[`double square brackets`]]`. Triple double quotes allow a value to contain almost anything. If a value contains no spaces or single or double quotes, it requires no delimiters.
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A more formal [[presentation|Macro Call Syntax]] of this syntax is also available.
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See some [[examples|Macro Calls in WikiText (Examples)]] and discussion about [[parser modes|WikiText parser mode: macro examples]].
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!! Macro Calls with <<.wlink TranscludeWidget>> Widget
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The shortcut syntax expands to the <<.wlink TranscludeWidget>> widget with the `$variable` attribute specifying the name of the macro to transclude.
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```
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<$transclude $variable="mymacro" param="This is the parameter value"/>
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```
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The widget itself offers greater flexibility than the shortcut syntax, including the ability to specify parameter values.
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!! Assigning Macro Calls to Attribute Values
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The result of a macro can be directly assigned to an attribute of a widget or HTML element. The result of the macro is not wikified, but the [[parameter substitution|Macro Parameter Handling]] is performed.
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```
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<div class=<<myclasses "Horizontal">>>
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...
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</div>
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```
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!! Using Macro Calls in Filters
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Macro calls can be used in filters:
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```
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<$list filter="[<mymacro param:'value'>]">
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...
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</$list>
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``` |