Package `TWiki::If`

Support for the conditions in %IF{} statements. Basically a simple stack-based parser for infix expressions that generates a parse tree that can subsequently be evaluated.

Package TWiki::If

ClassMethod new `(\%operators) -> \%factory`

Construct a new if node factory.

\%operators reference to a hash of operators.

Each operator must have the following fields: prec (precedence) type (0 unary 1 binary) exec (ref to a function to execute). If not provided, the default set of boolean operations supported by %IF is used.

ObjectMethod evaluate `($twiki) -> $result`

Execute the parse node.

!!!new!!!

ObjectMethod parse `($string) -> \$if`

$string - string containing an expression to parse

Construct a new search node by parsing the passed expression. Return the new object.

Topic TWikiIfDotPm . { Edit | Attach | Backlinks: Web All webs | Printable | History: r1 More }

Copyright © by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback
Note: Please contribute updates to this topic on TWiki.org at TWiki:TWiki.TWikiIfDotPm

	TWiki > TWiki > TWikiIfDotPm	TWiki webs: Main \| TWiki \| Sandbox
	TWiki . { Welcome \| Register \| Changes \| Topics \| Index \| Search \| Go }

Package TWiki::If

ClassMethod new (\%operators) -> \%factory

ObjectMethod evaluate ($twiki) -> $result

ObjectMethod parse ($string) -> \$if

Package `TWiki::If`

ClassMethod new `(\%operators) -> \%factory`

ObjectMethod evaluate `($twiki) -> $result`

ObjectMethod parse `($string) -> \$if`