Editing Packrat parser (section)

=== Operators ===
{| class="wikitable"
|+Syntax Rules
!Operator 
!Semantics
|-
|Sequence
<math>\alpha\beta</math>
|'''Success:''' If <math>\alpha</math> and <math>\beta</math> are recognized 

'''Failure:''' If <math>\alpha</math> or <math>\beta</math> are not recognized

'''Consumed:''' <math>\alpha</math> and <math>\beta</math> in case of success

|-
|Ordered choice
<math>\alpha/\beta/\gamma</math>
|'''Success:''' If any of <math>\{\alpha,\beta,\gamma\}</math> is recognized starting from the left

'''Failure:''' All of <math>\{\alpha,\beta,\gamma\}</math> do not match

'''Consumed:''' The atomic expression that has generated a success
so if multiple succeed the first one is always returned
|-
|And predicate
<math>\&\alpha</math>
|'''Success:''' If <math>\alpha</math> is recognized 

'''Failure:''' If <math>\alpha</math> is not recognized

'''Consumed:''' No input is consumed
|-
|Not predicate
<math>!\alpha</math>
|'''Success:''' If <math>\alpha</math> is not recognized 

'''Failure:''' If <math>\alpha</math> is recognized

'''Consumed:''' No input is consumed
|-
|One or more
<math>\alpha +</math>
|'''Success:''' Try to recognize <math>\alpha</math> one or multiple time

'''Failure:''' If <math>\alpha</math> is not recognized

'''Consumed:''' The maximum number that <math>\alpha
</math> is recognized
|-
|Zero or more
<math>\alpha *</math>
|'''Success:''' Try to recognize <math>\alpha</math> zero or multiple time

'''Failure:''' Cannot fail

'''Consumed:''' The maximum number that <math>\alpha
</math> is recognized
|-
|Zero or one
<math>\alpha ?</math>
|'''Success:''' Try to recognize <math>\alpha</math> zero or once

'''Failure:''' Cannot fail

'''Consumed:''' <math>\alpha</math> if it is recognized 
|-
|Terminal range
[<math>a-b</math>]
|'''Success:''' Recognize any terminal <math>c</math> that are inside the range <math>[a-b]</math>. In the case of <math> [\textbf{'} h \textbf{'} - \textbf{'} z \textbf{'}] </math>, <math>c</math> can be any letter from h to z 

'''Failure:''' If no terminal inside of <math>[a-b]</math> can be recognized

'''Consumed:''' <math>c</math> if it is recognized 
|-
|Any character
<math> . </math>
|'''Success:''' Recognize any character in the input
'''Failure:''' If no character in the input

'''Consumed:''' any character in the input 
|}