import {Parser} from “./state” import {SourceLocation} from “./locutil”

export class Node {

constructor(parser, pos, loc) {
  this.type = ""
  this.start = pos
  this.end = 0
  if (parser.options.locations)
    this.loc = new SourceLocation(parser, loc)
  if (parser.options.directSourceFile)
    this.sourceFile = parser.options.directSourceFile
  if (parser.options.ranges)
    this.range = [pos, 0]
}

}

// Start an AST node, attaching a start offset.

const pp = Parser.prototype

pp.startNode = function() {

return new Node(this, this.start, this.startLoc)

}

pp.startNodeAt = function(pos, loc) {

return new Node(this, pos, loc)

}

// Finish an AST node, adding `type` and `end` properties.

function finishNodeAt(node, type, pos, loc) {

node.type = type
node.end = pos
if (this.options.locations)
  node.loc.end = loc
if (this.options.ranges)
  node.range[1] = pos
return node

}

pp.finishNode = function(node, type) {

return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc)

}

// Finish node at given position

pp.finishNodeAt = function(node, type, pos, loc) {

return finishNodeAt.call(this, node, type, pos, loc)

}