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1. Macro definition code#
2. Macro definition plus#

Many macros-based diets classify macronutrients in three ways: Nutritionally speaking, macros are usually measured in grams, such as grams of fat or proteins. “Macro” comes from the Greek word makros, which means large. JavaScript macros are available to all tiddlers, and offer the maximum flexibility.Ī tiddler can manually import macro definitions from a selection of other tiddlers by using the $importvariables widget.The beginning of each word gives you a little clue into what they may mean. It is also possible to write a macro as a JavaScript module. To make a macro available to all tiddlers, define it in a tiddler that has the tag $:/tags/Macro.

Macro definition plus#

Macros are available to the tiddler that defines them, plus any tiddlers that it transcludes. Using parameter variables offers a workaround: \define film-quote(line) >/> Scope

Macro definition code#

The code above will fail if the macro is invoked with the argument containing triple double quotes (for example >). It invokes another macro using the single parameter as an argument for it: \define film-quote(line) The advantage of the technique is that it avoids the parameter value being substituted into the macro as a literal string, which in turn can help avoid issues with parameters that contain quotes.įor example, consider this macro. For example, the example above could also be expressed as: \define sayhi(name:"Bugs Bunny") Hi, I'm >/>.Īccessing parameters as variables only works in macros that are wikified and not, for example, when a macro is used as an attribute value.

Parameters in a wikitext macro can be accessed as variables by using the syntax >, i.e the parameter name surrounded by double underscores. Hi, I'm $(name)$ and I live in $(address)$.

The actual value of the parameter or variable is substituted for the placeholder whenever the macro is called: These consist of a variable name (or macro name) between dollar signs and round brackets, like $(this)$. The macro can also contain placeholders for variables. These consist of a parameter name between dollar signs, like $this$. The macro can contain placeholders for parameters. Text substitution of a variable defined outside of the macroĪccess to a variable (or other macro) defined outside of the macro Parameter-as-variable access to a parameter defined in the macro parameters list Text substitution of a parameter defined in the macro parameters list Inside the macro there are several methods for accessing variables defined outside of the macro or parameters from the macro parameter list. the snippet represented by the macro name), until \end appears on a line by itself: \define sayhi(name:"Bugs Bunny" address:"Rabbit Hole Hill")Īlternatively, the entire definition can be presented on a single line without an \end marker: \define sayhi(name:"Bugs Bunny") Hi, I'm $name$.Ī more formal presentation of this syntax is also available. The lines that follow contain the text of the macro text (i.e. Each parameter has a name and, optionally, a default value that is used if no value is supplied on a particular call to the macro. The first line of the definition specifies the macro name and any parameters. Like any pragma, this can only appear at the start of a tiddler. A macro is defined using a \define pragma.