Exception: Calyx::Errors::MissingRule

Inherits:

RuntimeError

Object
RuntimeError
Calyx::Errors::MissingRule

show all

Defined in:: lib/calyx/errors.rb

Overview

Only rules that exist in the registry can be evaluated. When a non-existent rule is referenced, this error is raised.

grammar = Calyx::Grammar.new do
  start :blank
end

grammar.evaluate
# => Calyx::Errors::MissingRule: :blank is not registered

Instance Method Summary collapse

#initialize(msg) ⇒ MissingRule constructor

A new instance of MissingRule.

Constructor Details

#initialize(msg) ⇒ `MissingRule`

Returns a new instance of MissingRule.



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# File 'lib/calyx/errors.rb', line 14

def initialize(msg)
  super(":#{msg} is not registered")
end