$INCLUDEONCE

The $INCLUDEONCE metacommand, when placed in include files, prevents that the file's contents can be injected multiple time into a program.

Syntax

$INCLUDEONCE

Description

• This Metacommand can be placed everywhere in an include file, but must be the only thing in the line, hence no additional whitespace or comments.
• If placed in the main program, $INCLUDEONCE does nothing and is simply ignored without error.

Availability

• 
  none
• 
  v3.12.0
• 
• 
  yes
• 
  yes
• 
  yes

See also

• $INCLUDE
• Metacommand

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