nl_tokens: Create an updater function for the esprima transform with the given error handler
pl_tokens: function getUpdater ( errorFn ) { errorFn = errorFn || new Function ( ) ; return updater ; /**
     * The updater function for the esprima transform
     * @param {string} file The filename for the Browserify transform
     * @param {object} ast The esprima syntax tree
     * @returns {object} The transformed esprima syntax tree
     */ function updater ( file , ast ) { if ( ast . comments ) { ast . comments . filter ( testDocTag ) . map ( getAnnotatedNode ) . concat ( inferAngular ( ast ) ) // find the items that are not explicitly annotated . filter ( testFirstOccurrence ) // ensure unique values . forEach ( processNode ) ; } else { errorFn ( 'Esprima AST is required to have top-level comments array' ) ; } return ast ; } /**
     * Get the node that is annotated by the comment or throw if not present.
     * @throws {Error} Where comment does not annotate a node
     * @param {object} comment The comment node
     */ function getAnnotatedNode ( comment ) { // find the first function declaration or expression following the annotation var result ; if ( comment . annotates ) { var candidateTrees ; // consider the context the block is in (i.e. what is its parent) var parent = comment . annotates . parent ; // consider nodes from the annotated node forward //  include the first non-generated node and all generated nodes preceding it if ( testNode . isBlockOrProgram ( parent ) ) { var body = parent . body ; var index = body . indexOf ( comment . annotates ) ; var candidates = body . <mask> ( index ) ; var length = candidates . map ( testNode . isGeneratedCode ) . indexOf ( false ) + 1 ; candidateTrees = candidates . slice ( 0 , length || candidates . length ) ; } // otherwise we can only consider the given node else { candidateTrees = [ comment . annotates ] ; } // try the nodes while ( ! result && candidateTrees . length ) { result = esprimaTools . orderNodes ( candidateTrees . shift ( ) ) . filter ( testNode . isFunctionNotIFFE ) . shift ( ) ; } } // throw where not valid if ( result ) { return result ; } else { errorFn ( 'Doc-tag @ngInject does not annotate anything' ) ; } } }