PROCESS 4D TAGS

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4D v15

PROCESS 4D TAGS

PROCESS 4D TAGS ( inputTemplate; outputResults{;param1;...;paramN} )

Parameter	Type		Description
inputTemplate	Text, BLOB	->	Data containing tags to process
outputResults	Text, BLOB	<-	Results of executed template
param1...N	Text, Date, Time, number, pointer	->	Parameter(s) to pass to template in execution

Description

Originally introduced in 4D v14 R4

Theme: Tools

The PROCESS 4D TAGS command now supports the insertion of parameters into the template being executed.

PROCESS 4D TAGS accepts an undefined number of additional param parameters. Just like for project methods, parameters can be scalar values of any type (text, date, time, longint, real, etc.). You can also use arrays by passing array pointers.

Within the template processed by 4D tags, these parameters are available through regular $1, $2, etc. arguments, like for 4D methods (see example).

A dedicated set of local variables is now defined for the PROCESS 4D TAGS in its execution context and can be read and set throughout the processing.

Compatibility note: In previous versions of 4D, local variables defined in the calling context could be accessed in the PROCESS 4D TAGS execution context in interpreted mode. This is no longer the case.

Note: A new 4DEval tag is also added in 4D, and the 4DLOOP tag now accepts pointers. For more information, please refer to the 4D transformation tags section.

Example

 ARRAY TEXT($array;2)

 $array{1}:="hello"

 $array{2}:="world"

 $input:="<!--#4DEVAL $1-->"

 $input:=$input+"<!--#4DLOOP $2-->"

 $input:=$input+"<!--#4DEVAL $2->{$2->}--> "

 $input:=$input+"<!--#4DENDLOOP-->"

 PROCESS 4D TAGS($input;$output;"elements = ";->$array)

  // $output = "elements = hello world"