The heat.engine.function Module

class heat.engine.function.Function(stack, fn_name, args)

Bases: object

Abstract base class for template functions.

dep_attrs(resource_name)

dependencies(path)

result()

Return the result of resolving the function.

Function subclasses must override this method to calculate their results.

validate()

Validate arguments without resolving the function.

Function subclasses must override this method to validate their args.

heat.engine.function.dep_attrs(snippet, resource_name)

Return an iterator over dependent attributes for specified resource_name in a template snippet.

The snippet should be already parsed to insert Function objects where appropriate.

heat.engine.function.dependencies(snippet, path='')

Return an iterator over Resource dependencies in a template snippet.

The snippet should be already parsed to insert Function objects where appropriate.

heat.engine.function.resolve(snippet)

heat.engine.function.validate(snippet)