class TaskJuggler::LogicalExpression
A LogicalExpression is an object that describes tree of LogicalOperation objects and the context that it should be evaluated in.
Attributes
query[R]
sourceFileInfo[R]
Public Class Methods
new(op, sourceFileInfo = nil)
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Create a new LogicalExpression object. op must be a LogicalOperation. sourceFileInfo is the file position where expression started. It may be nil if not available.
# File lib/taskjuggler/LogicalExpression.rb, line 29 def initialize(op, sourceFileInfo = nil) @operation = op @sourceFileInfo = sourceFileInfo @query = nil end
Public Instance Methods
eval(query)
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This function triggers the evaluation of the expression. property is the PropertyTreeNode that should be used for the evaluation. scopeProperty is the PropertyTreeNode that describes the scope. It may be nil.
# File lib/taskjuggler/LogicalExpression.rb, line 39 def eval(query) @query = query res = @operation.eval(self) return res if res.is_a?(TrueClass) || res.is_a?(FalseClass) || res.is_a?(String) # In TJP syntax 'non 0' means false. return res != 0 end
to_s(query = nil)
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Dump the LogicalExpression as a String. If query is provided, it will show the actual values, otherwise just the variable names.
# File lib/taskjuggler/LogicalExpression.rb, line 50 def to_s(query = nil) if @sourceFileInfo.nil? "#{@operation.to_s(query)}" else "#{@sourceFileInfo} #{@operation.to_s(query)}" end end