Exception: Parslet::ParseFailed

Inherits:
StandardError
  • Object
show all
Defined in:
lib/parslet.rb

Overview

Raised when the parse failed to match. It contains the message that should be presented to the user. More details can be extracted from the exceptions #cause member: It contains an instance of Cause that stores all the details of your failed parse in a tree structure. 

begin
  parslet.parse(str)
rescue Parslet::ParseFailed => failure
  puts failure.cause.ascii_tree
end

Alternatively, you can just require ‘parslet/convenience’ and call the method #parse_with_debug instead of #parse. This method will never raise and print error trees to stdout.

require 'parslet/convenience'
parslet.parse_with_debug(str)

Direct Known Subclasses

UnconsumedInput

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(message, cause = nil) ⇒ ParseFailed

Returns a new instance of ParseFailed.



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# File 'lib/parslet.rb', line 75

def initialize(message, cause=nil)
  super(message)
  @cause = cause
end

Instance Attribute Details

#cause ⇒ Parslet::Cause (readonly)

Why the parse failed.

Returns:



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# File 'lib/parslet.rb', line 83

def cause
  @cause
end