nl_tokens: . nud Null denotation . fud First null denotation . led Left denotation lbp Left binding power rbp Right binding power They are elements of the parsing method called Top Down Operator Precedence .
pl_tokens: function expression ( rbp , initial ) { var left , isArray = false , isObject = false ; if ( nexttoken . id === '(end)' ) error ( "Unexpected early end of program." , token ) ; advance ( ) ; if ( initial ) { anonname = 'anonymous' ; funct [ '(verb)' ] = token . value ; } if ( initial === true && token . fud ) { left = token . fud ( ) ; } else { if ( token . nud ) { left = token . nud ( ) ; } else { if ( nexttoken . type === '(number)' && token . id === '.' ) { warning ( "A leading decimal point can be confused with a dot: '.{a}'." , token , nexttoken . value ) ; advance ( ) ; return token ; } else { <mask> ( "Expected an identifier and instead saw '{a}'." , token , token . id ) ; } } while ( rbp < nexttoken . lbp ) { isArray = token . value === 'Array' ; isObject = token . value === 'Object' ; advance ( ) ; if ( isArray && token . id === '(' && nexttoken . id === ')' ) warning ( "Use the array literal notation []." , token ) ; if ( isObject && token . id === '(' && nexttoken . id === ')' ) warning ( "Use the object literal notation {}." , token ) ; if ( token . led ) { left = token . led ( left ) ; } else { error ( "Expected an operator and instead saw '{a}'." , token , token . id ) ; } } } return left ; }