Exception: WLang::Error

Inherits:

StandardError

• Object
• StandardError
• WLang::Error

show all

Defined in:

lib/wlang/errors.rb

Overview

Instance Attribute Summary (collapse)

• - (Object) cause

  Optional cause (other lower level exception).

• - (Object) parser_state

  The parser state whe this error has been raised.

Instance Method Summary (collapse)

• - (Error) initialize(msg = nil, parser_state = nil, cause = nil) constructor

  Creates an error instance with a given parser state.

• - (Object) wlang_backtrace

  Returns a friendly wlang backtrace.

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# File 'lib/wlang/errors.rb', line 13

def initialize(msg = nil, parser_state = nil, cause = nil)
  raise ArgumentError, "msg expected to be nil or a String" unless (msg.nil? or String===msg)
  raise ArgumentError, "parser_state expected to be nil or a State"\
    unless (parser_state.nil? or ::WLang::Parser::State===parser_state)
  super(msg)
  @parser_state = parser_state
  @cause = cause
end

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# File 'lib/wlang/errors.rb', line 10

def cause
  @cause
end

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# File 'lib/wlang/errors.rb', line 7

def parser_state
  @parser_state
end

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# File 'lib/wlang/errors.rb', line 23

def wlang_backtrace
  parser_state ? parser_state.backtrace : ["no backtrace information, sorry"]
end