function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }

function _createForOfIteratorHelperLoose(o, allowArrayLike) { var it; if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; return function () { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } it = o[Symbol.iterator](); return it.next.bind(it); }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

function getLocalName(node) {
  switch (node.type) {
    case 'ElementNode':
      // unfortunately the ElementNode stores `tag` as a string
      // if that changes in glimmer-vm this will need to be updated
      return node.tag.split('.')[0];

    case 'SubExpression':
    case 'MustacheStatement':
    case 'BlockStatement':
      return getLocalName(node.path);

    case 'UndefinedLiteral':
    case 'NullLiteral':
    case 'BooleanLiteral':
    case 'StringLiteral':
    case 'NumberLiteral':
    case 'TextNode':
    case 'Template':
    case 'Block':
    case 'CommentStatement':
    case 'MustacheCommentStatement':
    case 'PartialStatement':
    case 'ElementModifierStatement':
    case 'AttrNode':
    case 'ConcatStatement':
    case 'Program':
    case 'Hash':
    case 'HashPair':
      return undefined;

    case 'PathExpression':
    default:
      return node.parts.length ? node.parts[0] : undefined;
  }
}

function getLocals(node) {
  switch (node.type) {
    case 'ElementNode':
    case 'Program':
    case 'Block':
    case 'Template':
      return node.blockParams;

    case 'BlockStatement':
      return node.program.blockParams;

    default:
      return undefined;
  }
}

export var TransformScope = /*#__PURE__*/function () {
  function TransformScope(locals) {
    this.locals = locals;
    this.hasPartial = false;
    this.usedLocals = {};

    for (var _iterator = _createForOfIteratorHelperLoose(locals), _step; !(_step = _iterator()).done;) {
      var local = _step.value;
      this.usedLocals[local] = false;
    }
  }

  var _proto = TransformScope.prototype;

  _proto.child = function child(node) {
    var locals = getLocals(node);
    return locals ? new ChildTransformScope(locals, this) : this;
  };

  _proto.usePartial = function usePartial() {
    this.hasPartial = true;
  };

  return TransformScope;
}();

var RootTransformScope = /*#__PURE__*/function (_TransformScope) {
  _inheritsLoose(RootTransformScope, _TransformScope);

  function RootTransformScope(node) {
    var _a;

    var locals = (_a = getLocals(node)) !== null && _a !== void 0 ? _a : [];
    return _TransformScope.call(this, locals) || this;
  }

  var _proto2 = RootTransformScope.prototype;

  _proto2.useLocal = function useLocal(node) {
    var name = getLocalName(node);

    if (name && name in this.usedLocals) {
      this.usedLocals[name] = true;
    }
  };

  _proto2.isLocal = function isLocal(name) {
    return this.locals.indexOf(name) !== -1;
  };

  _proto2.currentUnusedLocals = function currentUnusedLocals() {
    var _this = this;

    if (!this.hasPartial && this.locals.length > 0) {
      return this.locals.filter(function (local) {
        return !_this.usedLocals[local];
      });
    }

    return false;
  };

  return RootTransformScope;
}(TransformScope);

export { RootTransformScope as default };

var ChildTransformScope = /*#__PURE__*/function (_TransformScope2) {
  _inheritsLoose(ChildTransformScope, _TransformScope2);

  function ChildTransformScope(locals, parent) {
    var _this2;

    _this2 = _TransformScope2.call(this, locals) || this;
    _this2.parent = parent;
    return _this2;
  }

  var _proto3 = ChildTransformScope.prototype;

  _proto3.useLocal = function useLocal(node) {
    var name = getLocalName(node);

    if (name && name in this.usedLocals) {
      this.usedLocals[name] = true;
    } else {
      this.parent.useLocal(node);
    }
  };

  _proto3.isLocal = function isLocal(name) {
    return this.locals.indexOf(name) !== -1 || this.parent.isLocal(name);
  };

  _proto3.currentUnusedLocals = function currentUnusedLocals() {
    if (!this.hasPartial && this.locals.length > 0) {
      // We only care about the last local, because if it is used then it implies
      // usage of the others (specifically when in a child block, |foo bar|)
      if (!this.usedLocals[this.locals[this.locals.length - 1]]) {
        return [this.locals[this.locals.length - 1]];
      }
    }

    return false;
  };

  return ChildTransformScope;
}(TransformScope);
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"sources":["../../../../../packages/@glimmer/syntax/lib/traversal/scope.ts"],"names":[],"mappings":";;;;;;;;AAEA,SAAA,YAAA,CAAA,IAAA,EAAsC;AACpC,UAAQ,IAAI,CAAZ,IAAA;AACE,SAAA,aAAA;AACE;AACA;AACA,aAAO,IAAI,CAAJ,GAAA,CAAA,KAAA,CAAA,GAAA,EAAP,CAAO,CAAP;;AAEF,SAAA,eAAA;AACA,SAAA,mBAAA;AACA,SAAA,gBAAA;AACE,aAAO,YAAY,CAAC,IAAI,CAAxB,IAAmB,CAAnB;;AAEF,SAAA,kBAAA;AACA,SAAA,aAAA;AACA,SAAA,gBAAA;AACA,SAAA,eAAA;AACA,SAAA,eAAA;AACA,SAAA,UAAA;AACA,SAAA,UAAA;AACA,SAAA,OAAA;AACA,SAAA,kBAAA;AACA,SAAA,0BAAA;AACA,SAAA,kBAAA;AACA,SAAA,0BAAA;AACA,SAAA,UAAA;AACA,SAAA,iBAAA;AACA,SAAA,SAAA;AACA,SAAA,MAAA;AACA,SAAA,UAAA;AACE,aAAA,SAAA;;AACF,SAAA,gBAAA;AACA;AACE,aAAO,IAAI,CAAJ,KAAA,CAAA,MAAA,GAAoB,IAAI,CAAJ,KAAA,CAApB,CAAoB,CAApB,GAAP,SAAA;AA/BJ;AAiCD;;AAED,SAAA,SAAA,CAAA,IAAA,EAAmC;AACjC,UAAQ,IAAI,CAAZ,IAAA;AACE,SAAA,aAAA;AACA,SAAA,SAAA;AACA,SAAA,OAAA;AACA,SAAA,UAAA;AACE,aAAO,IAAI,CAAX,WAAA;;AAEF,SAAA,gBAAA;AACE,aAAO,IAAI,CAAJ,OAAA,CAAP,WAAA;;AAEF;AACE,aAAA,SAAA;AAXJ;AAaD;;AAED,WAAM,cAAN;AAIE,0BAAA,MAAA,EAAsC;AAAhB,SAAA,MAAA,GAAA,MAAA;AAHtB,SAAA,UAAA,GAAA,KAAA;AACA,SAAA,UAAA,GAAA,EAAA;;AAGE,yDAAA,MAAA,wCAA4B;AAAA,UAA5B,KAA4B;AAC1B,WAAA,UAAA,CAAA,KAAA,IAAA,KAAA;AACD;AACF;;AARH;;AAAA,SAUE,KAVF,GAUE,eAAK,IAAL,EAAsB;AACpB,QAAI,MAAM,GAAG,SAAS,CAAtB,IAAsB,CAAtB;AAEA,WAAO,MAAM,GAAG,IAAA,mBAAA,CAAA,MAAA,EAAH,IAAG,CAAH,GAAb,IAAA;AACD,GAdH;;AAAA,SAgBE,UAhBF,GAgBE,sBAAU;AACR,SAAA,UAAA,GAAA,IAAA;AACD,GAlBH;;AAAA;AAAA;;IAyBc,kB;;;AACZ,8BAAA,IAAA,EAA4B;;;AAC1B,QAAI,MAAM,GAAA,CAAA,EAAA,GAAG,SAAS,CAAZ,IAAY,CAAZ,MAAA,IAAA,IAAkB,EAAA,KAAA,KAAlB,CAAA,GAAA,EAAA,GAAV,EAAA;AAD0B,WAG1B,2BAAA,MAAA,CAH0B;AAI3B;;;;UAED,Q,GAAA,kBAAQ,IAAR,EAAyB;AACvB,QAAI,IAAI,GAAG,YAAY,CAAvB,IAAuB,CAAvB;;AAEA,QAAI,IAAI,IAAI,IAAI,IAAI,KAApB,UAAA,EAAqC;AACnC,WAAA,UAAA,CAAA,IAAA,IAAA,IAAA;AACD;AACF,G;;UAED,O,GAAA,iBAAO,IAAP,EAAoB;AAClB,WAAO,KAAA,MAAA,CAAA,OAAA,CAAA,IAAA,MAA8B,CAArC,CAAA;AACD,G;;UAED,mB,GAAA,+BAAmB;AAAA;;AACjB,QAAI,CAAC,KAAD,UAAA,IAAoB,KAAA,MAAA,CAAA,MAAA,GAAxB,CAAA,EAAgD;AAC9C,aAAO,KAAA,MAAA,CAAA,MAAA,CAAoB,UAAA,KAAD;AAAA,eAAW,CAAC,KAAA,CAAA,UAAA,CAAtC,KAAsC,CAAZ;AAAA,OAAnB,CAAP;AACD;;AAED,WAAA,KAAA;AACD,G;;;EAzBW,c;;SAAA,kB;;IA4Bd,mB;;;AACE,+BAAA,MAAA,EAAA,MAAA,EAA4D;AAAA;;AAC1D,yCAAA,MAAA;AADoC,WAAA,MAAA,GAAA,MAAA;AAAsB;AAE3D;;;;UAED,Q,GAAA,kBAAQ,IAAR,EAAyB;AACvB,QAAI,IAAI,GAAG,YAAY,CAAvB,IAAuB,CAAvB;;AAEA,QAAI,IAAI,IAAI,IAAI,IAAI,KAApB,UAAA,EAAqC;AACnC,WAAA,UAAA,CAAA,IAAA,IAAA,IAAA;AADF,KAAA,MAEO;AACL,WAAA,MAAA,CAAA,QAAA,CAAA,IAAA;AACD;AACF,G;;UAED,O,GAAA,iBAAO,IAAP,EAAoB;AAClB,WAAO,KAAA,MAAA,CAAA,OAAA,CAAA,IAAA,MAA8B,CAA9B,CAAA,IAAoC,KAAA,MAAA,CAAA,OAAA,CAA3C,IAA2C,CAA3C;AACD,G;;UAED,mB,GAAA,+BAAmB;AACjB,QAAI,CAAC,KAAD,UAAA,IAAoB,KAAA,MAAA,CAAA,MAAA,GAAxB,CAAA,EAAgD;AAC9C;AACA;AACA,UAAI,CAAC,KAAA,UAAA,CAAgB,KAAA,MAAA,CAAY,KAAA,MAAA,CAAA,MAAA,GAAjC,CAAqB,CAAhB,CAAL,EAA2D;AACzD,eAAO,CAAC,KAAA,MAAA,CAAY,KAAA,MAAA,CAAA,MAAA,GAApB,CAAQ,CAAD,CAAP;AACD;AACF;;AAED,WAAA,KAAA;AACD,G;;;EA7BH,c","sourcesContent":["import * as ASTv1 from '../v1/api';\n\nfunction getLocalName(node: ASTv1.Node): string | undefined {\n  switch (node.type) {\n    case 'ElementNode':\n      // unfortunately the ElementNode stores `tag` as a string\n      // if that changes in glimmer-vm this will need to be updated\n      return node.tag.split('.')[0];\n\n    case 'SubExpression':\n    case 'MustacheStatement':\n    case 'BlockStatement':\n      return getLocalName(node.path);\n\n    case 'UndefinedLiteral':\n    case 'NullLiteral':\n    case 'BooleanLiteral':\n    case 'StringLiteral':\n    case 'NumberLiteral':\n    case 'TextNode':\n    case 'Template':\n    case 'Block':\n    case 'CommentStatement':\n    case 'MustacheCommentStatement':\n    case 'PartialStatement':\n    case 'ElementModifierStatement':\n    case 'AttrNode':\n    case 'ConcatStatement':\n    case 'Program':\n    case 'Hash':\n    case 'HashPair':\n      return undefined;\n    case 'PathExpression':\n    default:\n      return node.parts.length ? node.parts[0] : undefined;\n  }\n}\n\nfunction getLocals(node: ASTv1.Node): string[] | undefined {\n  switch (node.type) {\n    case 'ElementNode':\n    case 'Program':\n    case 'Block':\n    case 'Template':\n      return node.blockParams;\n\n    case 'BlockStatement':\n      return node.program.blockParams;\n\n    default:\n      return undefined;\n  }\n}\n\nexport abstract class TransformScope {\n  hasPartial = false;\n  usedLocals: { [key: string]: boolean } = {};\n\n  constructor(protected locals: string[]) {\n    for (const local of locals) {\n      this.usedLocals[local] = false;\n    }\n  }\n\n  child(node: ASTv1.Node): TransformScope {\n    let locals = getLocals(node);\n\n    return locals ? new ChildTransformScope(locals, this) : this;\n  }\n\n  usePartial(): void {\n    this.hasPartial = true;\n  }\n\n  abstract isLocal(name: string): boolean;\n  abstract useLocal(node: ASTv1.Node): void;\n  abstract currentUnusedLocals(): string[] | false;\n}\n\nexport default class RootTransformScope extends TransformScope {\n  constructor(node: ASTv1.Node) {\n    let locals = getLocals(node) ?? [];\n\n    super(locals);\n  }\n\n  useLocal(node: ASTv1.Node): void {\n    let name = getLocalName(node);\n\n    if (name && name in this.usedLocals) {\n      this.usedLocals[name] = true;\n    }\n  }\n\n  isLocal(name: string): boolean {\n    return this.locals.indexOf(name) !== -1;\n  }\n\n  currentUnusedLocals(): string[] | false {\n    if (!this.hasPartial && this.locals.length > 0) {\n      return this.locals.filter((local) => !this.usedLocals[local]);\n    }\n\n    return false;\n  }\n}\n\nclass ChildTransformScope extends TransformScope {\n  constructor(locals: string[], private parent: TransformScope) {\n    super(locals);\n  }\n\n  useLocal(node: ASTv1.Node): void {\n    let name = getLocalName(node);\n\n    if (name && name in this.usedLocals) {\n      this.usedLocals[name] = true;\n    } else {\n      this.parent.useLocal(node);\n    }\n  }\n\n  isLocal(name: string): boolean {\n    return this.locals.indexOf(name) !== -1 || this.parent.isLocal(name);\n  }\n\n  currentUnusedLocals(): string[] | false {\n    if (!this.hasPartial && this.locals.length > 0) {\n      // We only care about the last local, because if it is used then it implies\n      // usage of the others (specifically when in a child block, |foo bar|)\n      if (!this.usedLocals[this.locals[this.locals.length - 1]]) {\n        return [this.locals[this.locals.length - 1]];\n      }\n    }\n\n    return false;\n  }\n}\n"],"sourceRoot":""}