@angular/compiler
Version:
Angular - the compiler library
362 lines • 57.4 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
(function (factory) {
if (typeof module === "object" && typeof module.exports === "object") {
var v = factory(require, exports);
if (v !== undefined) module.exports = v;
}
else if (typeof define === "function" && define.amd) {
define("@angular/compiler/src/ml_parser/parser", ["require", "exports", "tslib", "@angular/compiler/src/parse_util", "@angular/compiler/src/ml_parser/ast", "@angular/compiler/src/ml_parser/lexer", "@angular/compiler/src/ml_parser/tags"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Parser = exports.ParseTreeResult = exports.TreeError = void 0;
var tslib_1 = require("tslib");
var parse_util_1 = require("@angular/compiler/src/parse_util");
var html = require("@angular/compiler/src/ml_parser/ast");
var lex = require("@angular/compiler/src/ml_parser/lexer");
var tags_1 = require("@angular/compiler/src/ml_parser/tags");
var TreeError = /** @class */ (function (_super) {
tslib_1.__extends(TreeError, _super);
function TreeError(elementName, span, msg) {
var _this = _super.call(this, span, msg) || this;
_this.elementName = elementName;
return _this;
}
TreeError.create = function (elementName, span, msg) {
return new TreeError(elementName, span, msg);
};
return TreeError;
}(parse_util_1.ParseError));
exports.TreeError = TreeError;
var ParseTreeResult = /** @class */ (function () {
function ParseTreeResult(rootNodes, errors) {
this.rootNodes = rootNodes;
this.errors = errors;
}
return ParseTreeResult;
}());
exports.ParseTreeResult = ParseTreeResult;
var Parser = /** @class */ (function () {
function Parser(getTagDefinition) {
this.getTagDefinition = getTagDefinition;
}
Parser.prototype.parse = function (source, url, options) {
var tokenizeResult = lex.tokenize(source, url, this.getTagDefinition, options);
var parser = new _TreeBuilder(tokenizeResult.tokens, this.getTagDefinition);
parser.build();
return new ParseTreeResult(parser.rootNodes, tokenizeResult.errors.concat(parser.errors));
};
return Parser;
}());
exports.Parser = Parser;
var _TreeBuilder = /** @class */ (function () {
function _TreeBuilder(tokens, getTagDefinition) {
this.tokens = tokens;
this.getTagDefinition = getTagDefinition;
this._index = -1;
this._elementStack = [];
this.rootNodes = [];
this.errors = [];
this._advance();
}
_TreeBuilder.prototype.build = function () {
while (this._peek.type !== lex.TokenType.EOF) {
if (this._peek.type === lex.TokenType.TAG_OPEN_START ||
this._peek.type === lex.TokenType.INCOMPLETE_TAG_OPEN) {
this._consumeStartTag(this._advance());
}
else if (this._peek.type === lex.TokenType.TAG_CLOSE) {
this._consumeEndTag(this._advance());
}
else if (this._peek.type === lex.TokenType.CDATA_START) {
this._closeVoidElement();
this._consumeCdata(this._advance());
}
else if (this._peek.type === lex.TokenType.COMMENT_START) {
this._closeVoidElement();
this._consumeComment(this._advance());
}
else if (this._peek.type === lex.TokenType.TEXT || this._peek.type === lex.TokenType.RAW_TEXT ||
this._peek.type === lex.TokenType.ESCAPABLE_RAW_TEXT) {
this._closeVoidElement();
this._consumeText(this._advance());
}
else if (this._peek.type === lex.TokenType.EXPANSION_FORM_START) {
this._consumeExpansion(this._advance());
}
else {
// Skip all other tokens...
this._advance();
}
}
};
_TreeBuilder.prototype._advance = function () {
var prev = this._peek;
if (this._index < this.tokens.length - 1) {
// Note: there is always an EOF token at the end
this._index++;
}
this._peek = this.tokens[this._index];
return prev;
};
_TreeBuilder.prototype._advanceIf = function (type) {
if (this._peek.type === type) {
return this._advance();
}
return null;
};
_TreeBuilder.prototype._consumeCdata = function (_startToken) {
this._consumeText(this._advance());
this._advanceIf(lex.TokenType.CDATA_END);
};
_TreeBuilder.prototype._consumeComment = function (token) {
var text = this._advanceIf(lex.TokenType.RAW_TEXT);
this._advanceIf(lex.TokenType.COMMENT_END);
var value = text != null ? text.parts[0].trim() : null;
this._addToParent(new html.Comment(value, token.sourceSpan));
};
_TreeBuilder.prototype._consumeExpansion = function (token) {
var switchValue = this._advance();
var type = this._advance();
var cases = [];
// read =
while (this._peek.type === lex.TokenType.EXPANSION_CASE_VALUE) {
var expCase = this._parseExpansionCase();
if (!expCase)
return; // error
cases.push(expCase);
}
// read the final }
if (this._peek.type !== lex.TokenType.EXPANSION_FORM_END) {
this.errors.push(TreeError.create(null, this._peek.sourceSpan, "Invalid ICU message. Missing '}'."));
return;
}
var sourceSpan = new parse_util_1.ParseSourceSpan(token.sourceSpan.start, this._peek.sourceSpan.end, token.sourceSpan.fullStart);
this._addToParent(new html.Expansion(switchValue.parts[0], type.parts[0], cases, sourceSpan, switchValue.sourceSpan));
this._advance();
};
_TreeBuilder.prototype._parseExpansionCase = function () {
var value = this._advance();
// read {
if (this._peek.type !== lex.TokenType.EXPANSION_CASE_EXP_START) {
this.errors.push(TreeError.create(null, this._peek.sourceSpan, "Invalid ICU message. Missing '{'."));
return null;
}
// read until }
var start = this._advance();
var exp = this._collectExpansionExpTokens(start);
if (!exp)
return null;
var end = this._advance();
exp.push(new lex.Token(lex.TokenType.EOF, [], end.sourceSpan));
// parse everything in between { and }
var expansionCaseParser = new _TreeBuilder(exp, this.getTagDefinition);
expansionCaseParser.build();
if (expansionCaseParser.errors.length > 0) {
this.errors = this.errors.concat(expansionCaseParser.errors);
return null;
}
var sourceSpan = new parse_util_1.ParseSourceSpan(value.sourceSpan.start, end.sourceSpan.end, value.sourceSpan.fullStart);
var expSourceSpan = new parse_util_1.ParseSourceSpan(start.sourceSpan.start, end.sourceSpan.end, start.sourceSpan.fullStart);
return new html.ExpansionCase(value.parts[0], expansionCaseParser.rootNodes, sourceSpan, value.sourceSpan, expSourceSpan);
};
_TreeBuilder.prototype._collectExpansionExpTokens = function (start) {
var exp = [];
var expansionFormStack = [lex.TokenType.EXPANSION_CASE_EXP_START];
while (true) {
if (this._peek.type === lex.TokenType.EXPANSION_FORM_START ||
this._peek.type === lex.TokenType.EXPANSION_CASE_EXP_START) {
expansionFormStack.push(this._peek.type);
}
if (this._peek.type === lex.TokenType.EXPANSION_CASE_EXP_END) {
if (lastOnStack(expansionFormStack, lex.TokenType.EXPANSION_CASE_EXP_START)) {
expansionFormStack.pop();
if (expansionFormStack.length == 0)
return exp;
}
else {
this.errors.push(TreeError.create(null, start.sourceSpan, "Invalid ICU message. Missing '}'."));
return null;
}
}
if (this._peek.type === lex.TokenType.EXPANSION_FORM_END) {
if (lastOnStack(expansionFormStack, lex.TokenType.EXPANSION_FORM_START)) {
expansionFormStack.pop();
}
else {
this.errors.push(TreeError.create(null, start.sourceSpan, "Invalid ICU message. Missing '}'."));
return null;
}
}
if (this._peek.type === lex.TokenType.EOF) {
this.errors.push(TreeError.create(null, start.sourceSpan, "Invalid ICU message. Missing '}'."));
return null;
}
exp.push(this._advance());
}
};
_TreeBuilder.prototype._consumeText = function (token) {
var text = token.parts[0];
if (text.length > 0 && text[0] == '\n') {
var parent_1 = this._getParentElement();
if (parent_1 != null && parent_1.children.length == 0 &&
this.getTagDefinition(parent_1.name).ignoreFirstLf) {
text = text.substring(1);
}
}
if (text.length > 0) {
this._addToParent(new html.Text(text, token.sourceSpan));
}
};
_TreeBuilder.prototype._closeVoidElement = function () {
var el = this._getParentElement();
if (el && this.getTagDefinition(el.name).isVoid) {
this._elementStack.pop();
}
};
_TreeBuilder.prototype._consumeStartTag = function (startTagToken) {
var _a = tslib_1.__read(startTagToken.parts, 2), prefix = _a[0], name = _a[1];
var attrs = [];
while (this._peek.type === lex.TokenType.ATTR_NAME) {
attrs.push(this._consumeAttr(this._advance()));
}
var fullName = this._getElementFullName(prefix, name, this._getParentElement());
var selfClosing = false;
// Note: There could have been a tokenizer error
// so that we don't get a token for the end tag...
if (this._peek.type === lex.TokenType.TAG_OPEN_END_VOID) {
this._advance();
selfClosing = true;
var tagDef = this.getTagDefinition(fullName);
if (!(tagDef.canSelfClose || tags_1.getNsPrefix(fullName) !== null || tagDef.isVoid)) {
this.errors.push(TreeError.create(fullName, startTagToken.sourceSpan, "Only void and foreign elements can be self closed \"" + startTagToken.parts[1] + "\""));
}
}
else if (this._peek.type === lex.TokenType.TAG_OPEN_END) {
this._advance();
selfClosing = false;
}
var end = this._peek.sourceSpan.fullStart;
var span = new parse_util_1.ParseSourceSpan(startTagToken.sourceSpan.start, end, startTagToken.sourceSpan.fullStart);
// Create a separate `startSpan` because `span` will be modified when there is an `end` span.
var startSpan = new parse_util_1.ParseSourceSpan(startTagToken.sourceSpan.start, end, startTagToken.sourceSpan.fullStart);
var el = new html.Element(fullName, attrs, [], span, startSpan, undefined);
this._pushElement(el);
if (selfClosing) {
// Elements that are self-closed have their `endSourceSpan` set to the full span, as the
// element start tag also represents the end tag.
this._popElement(fullName, span);
}
else if (startTagToken.type === lex.TokenType.INCOMPLETE_TAG_OPEN) {
// We already know the opening tag is not complete, so it is unlikely it has a corresponding
// close tag. Let's optimistically parse it as a full element and emit an error.
this._popElement(fullName, null);
this.errors.push(TreeError.create(fullName, span, "Opening tag \"" + fullName + "\" not terminated."));
}
};
_TreeBuilder.prototype._pushElement = function (el) {
var parentEl = this._getParentElement();
if (parentEl && this.getTagDefinition(parentEl.name).isClosedByChild(el.name)) {
this._elementStack.pop();
}
this._addToParent(el);
this._elementStack.push(el);
};
_TreeBuilder.prototype._consumeEndTag = function (endTagToken) {
var fullName = this._getElementFullName(endTagToken.parts[0], endTagToken.parts[1], this._getParentElement());
if (this.getTagDefinition(fullName).isVoid) {
this.errors.push(TreeError.create(fullName, endTagToken.sourceSpan, "Void elements do not have end tags \"" + endTagToken.parts[1] + "\""));
}
else if (!this._popElement(fullName, endTagToken.sourceSpan)) {
var errMsg = "Unexpected closing tag \"" + fullName + "\". It may happen when the tag has already been closed by another tag. For more info see https://www.w3.org/TR/html5/syntax.html#closing-elements-that-have-implied-end-tags";
this.errors.push(TreeError.create(fullName, endTagToken.sourceSpan, errMsg));
}
};
/**
* Closes the nearest element with the tag name `fullName` in the parse tree.
* `endSourceSpan` is the span of the closing tag, or null if the element does
* not have a closing tag (for example, this happens when an incomplete
* opening tag is recovered).
*/
_TreeBuilder.prototype._popElement = function (fullName, endSourceSpan) {
var unexpectedCloseTagDetected = false;
for (var stackIndex = this._elementStack.length - 1; stackIndex >= 0; stackIndex--) {
var el = this._elementStack[stackIndex];
if (el.name == fullName) {
// Record the parse span with the element that is being closed. Any elements that are
// removed from the element stack at this point are closed implicitly, so they won't get
// an end source span (as there is no explicit closing element).
el.endSourceSpan = endSourceSpan;
el.sourceSpan.end = endSourceSpan !== null ? endSourceSpan.end : el.sourceSpan.end;
this._elementStack.splice(stackIndex, this._elementStack.length - stackIndex);
return !unexpectedCloseTagDetected;
}
if (!this.getTagDefinition(el.name).closedByParent) {
// Note that we encountered an unexpected close tag but continue processing the element
// stack so we can assign an `endSourceSpan` if there is a corresponding start tag for this
// end tag in the stack.
unexpectedCloseTagDetected = true;
}
}
return false;
};
_TreeBuilder.prototype._consumeAttr = function (attrName) {
var fullName = tags_1.mergeNsAndName(attrName.parts[0], attrName.parts[1]);
var end = attrName.sourceSpan.end;
var value = '';
var valueSpan = undefined;
if (this._peek.type === lex.TokenType.ATTR_QUOTE) {
this._advance();
}
if (this._peek.type === lex.TokenType.ATTR_VALUE) {
var valueToken = this._advance();
value = valueToken.parts[0];
end = valueToken.sourceSpan.end;
valueSpan = valueToken.sourceSpan;
}
if (this._peek.type === lex.TokenType.ATTR_QUOTE) {
var quoteToken = this._advance();
end = quoteToken.sourceSpan.end;
}
var keySpan = new parse_util_1.ParseSourceSpan(attrName.sourceSpan.start, attrName.sourceSpan.end);
return new html.Attribute(fullName, value, new parse_util_1.ParseSourceSpan(attrName.sourceSpan.start, end, attrName.sourceSpan.fullStart), keySpan, valueSpan);
};
_TreeBuilder.prototype._getParentElement = function () {
return this._elementStack.length > 0 ? this._elementStack[this._elementStack.length - 1] : null;
};
_TreeBuilder.prototype._addToParent = function (node) {
var parent = this._getParentElement();
if (parent != null) {
parent.children.push(node);
}
else {
this.rootNodes.push(node);
}
};
_TreeBuilder.prototype._getElementFullName = function (prefix, localName, parentElement) {
if (prefix === '') {
prefix = this.getTagDefinition(localName).implicitNamespacePrefix || '';
if (prefix === '' && parentElement != null) {
var parentTagName = tags_1.splitNsName(parentElement.name)[1];
var parentTagDefinition = this.getTagDefinition(parentTagName);
if (!parentTagDefinition.preventNamespaceInheritance) {
prefix = tags_1.getNsPrefix(parentElement.name);
}
}
}
return tags_1.mergeNsAndName(prefix, localName);
};
return _TreeBuilder;
}());
function lastOnStack(stack, element) {
return stack.length > 0 && stack[stack.length - 1] === element;
}
});
//# 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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ParseError, ParseSourceSpan} from '../parse_util';\n\nimport * as html from './ast';\nimport * as lex from './lexer';\nimport {getNsPrefix, mergeNsAndName, splitNsName, TagDefinition} from './tags';\n\nexport class TreeError extends ParseError {\n  static create(elementName: string|null, span: ParseSourceSpan, msg: string): TreeError {\n    return new TreeError(elementName, span, msg);\n  }\n\n  constructor(public elementName: string|null, span: ParseSourceSpan, msg: string) {\n    super(span, msg);\n  }\n}\n\nexport class ParseTreeResult {\n  constructor(public rootNodes: html.Node[], public errors: ParseError[]) {}\n}\n\nexport class Parser {\n  constructor(public getTagDefinition: (tagName: string) => TagDefinition) {}\n\n  parse(source: string, url: string, options?: lex.TokenizeOptions): ParseTreeResult {\n    const tokenizeResult = lex.tokenize(source, url, this.getTagDefinition, options);\n    const parser = new _TreeBuilder(tokenizeResult.tokens, this.getTagDefinition);\n    parser.build();\n    return new ParseTreeResult(\n        parser.rootNodes,\n        (tokenizeResult.errors as ParseError[]).concat(parser.errors),\n    );\n  }\n}\n\nclass _TreeBuilder {\n  private _index: number = -1;\n  // `_peek` will be initialized by the call to `advance()` in the constructor.\n  private _peek!: lex.Token;\n  private _elementStack: html.Element[] = [];\n\n  rootNodes: html.Node[] = [];\n  errors: TreeError[] = [];\n\n  constructor(\n      private tokens: lex.Token[], private getTagDefinition: (tagName: string) => TagDefinition) {\n    this._advance();\n  }\n\n  build(): void {\n    while (this._peek.type !== lex.TokenType.EOF) {\n      if (this._peek.type === lex.TokenType.TAG_OPEN_START ||\n          this._peek.type === lex.TokenType.INCOMPLETE_TAG_OPEN) {\n        this._consumeStartTag(this._advance());\n      } else if (this._peek.type === lex.TokenType.TAG_CLOSE) {\n        this._consumeEndTag(this._advance());\n      } else if (this._peek.type === lex.TokenType.CDATA_START) {\n        this._closeVoidElement();\n        this._consumeCdata(this._advance());\n      } else if (this._peek.type === lex.TokenType.COMMENT_START) {\n        this._closeVoidElement();\n        this._consumeComment(this._advance());\n      } else if (\n          this._peek.type === lex.TokenType.TEXT || this._peek.type === lex.TokenType.RAW_TEXT ||\n          this._peek.type === lex.TokenType.ESCAPABLE_RAW_TEXT) {\n        this._closeVoidElement();\n        this._consumeText(this._advance());\n      } else if (this._peek.type === lex.TokenType.EXPANSION_FORM_START) {\n        this._consumeExpansion(this._advance());\n      } else {\n        // Skip all other tokens...\n        this._advance();\n      }\n    }\n  }\n\n  private _advance(): lex.Token {\n    const prev = this._peek;\n    if (this._index < this.tokens.length - 1) {\n      // Note: there is always an EOF token at the end\n      this._index++;\n    }\n    this._peek = this.tokens[this._index];\n    return prev;\n  }\n\n  private _advanceIf(type: lex.TokenType): lex.Token|null {\n    if (this._peek.type === type) {\n      return this._advance();\n    }\n    return null;\n  }\n\n  private _consumeCdata(_startToken: lex.Token) {\n    this._consumeText(this._advance());\n    this._advanceIf(lex.TokenType.CDATA_END);\n  }\n\n  private _consumeComment(token: lex.Token) {\n    const text = this._advanceIf(lex.TokenType.RAW_TEXT);\n    this._advanceIf(lex.TokenType.COMMENT_END);\n    const value = text != null ? text.parts[0].trim() : null;\n    this._addToParent(new html.Comment(value, token.sourceSpan));\n  }\n\n  private _consumeExpansion(token: lex.Token) {\n    const switchValue = this._advance();\n\n    const type = this._advance();\n    const cases: html.ExpansionCase[] = [];\n\n    // read =\n    while (this._peek.type === lex.TokenType.EXPANSION_CASE_VALUE) {\n      const expCase = this._parseExpansionCase();\n      if (!expCase) return;  // error\n      cases.push(expCase);\n    }\n\n    // read the final }\n    if (this._peek.type !== lex.TokenType.EXPANSION_FORM_END) {\n      this.errors.push(\n          TreeError.create(null, this._peek.sourceSpan, `Invalid ICU message. Missing '}'.`));\n      return;\n    }\n    const sourceSpan = new ParseSourceSpan(\n        token.sourceSpan.start, this._peek.sourceSpan.end, token.sourceSpan.fullStart);\n    this._addToParent(new html.Expansion(\n        switchValue.parts[0], type.parts[0], cases, sourceSpan, switchValue.sourceSpan));\n\n    this._advance();\n  }\n\n  private _parseExpansionCase(): html.ExpansionCase|null {\n    const value = this._advance();\n\n    // read {\n    if (this._peek.type !== lex.TokenType.EXPANSION_CASE_EXP_START) {\n      this.errors.push(\n          TreeError.create(null, this._peek.sourceSpan, `Invalid ICU message. Missing '{'.`));\n      return null;\n    }\n\n    // read until }\n    const start = this._advance();\n\n    const exp = this._collectExpansionExpTokens(start);\n    if (!exp) return null;\n\n    const end = this._advance();\n    exp.push(new lex.Token(lex.TokenType.EOF, [], end.sourceSpan));\n\n    // parse everything in between { and }\n    const expansionCaseParser = new _TreeBuilder(exp, this.getTagDefinition);\n    expansionCaseParser.build();\n    if (expansionCaseParser.errors.length > 0) {\n      this.errors = this.errors.concat(expansionCaseParser.errors);\n      return null;\n    }\n\n    const sourceSpan =\n        new ParseSourceSpan(value.sourceSpan.start, end.sourceSpan.end, value.sourceSpan.fullStart);\n    const expSourceSpan =\n        new ParseSourceSpan(start.sourceSpan.start, end.sourceSpan.end, start.sourceSpan.fullStart);\n    return new html.ExpansionCase(\n        value.parts[0], expansionCaseParser.rootNodes, sourceSpan, value.sourceSpan, expSourceSpan);\n  }\n\n  private _collectExpansionExpTokens(start: lex.Token): lex.Token[]|null {\n    const exp: lex.Token[] = [];\n    const expansionFormStack = [lex.TokenType.EXPANSION_CASE_EXP_START];\n\n    while (true) {\n      if (this._peek.type === lex.TokenType.EXPANSION_FORM_START ||\n          this._peek.type === lex.TokenType.EXPANSION_CASE_EXP_START) {\n        expansionFormStack.push(this._peek.type);\n      }\n\n      if (this._peek.type === lex.TokenType.EXPANSION_CASE_EXP_END) {\n        if (lastOnStack(expansionFormStack, lex.TokenType.EXPANSION_CASE_EXP_START)) {\n          expansionFormStack.pop();\n          if (expansionFormStack.length == 0) return exp;\n\n        } else {\n          this.errors.push(\n              TreeError.create(null, start.sourceSpan, `Invalid ICU message. Missing '}'.`));\n          return null;\n        }\n      }\n\n      if (this._peek.type === lex.TokenType.EXPANSION_FORM_END) {\n        if (lastOnStack(expansionFormStack, lex.TokenType.EXPANSION_FORM_START)) {\n          expansionFormStack.pop();\n        } else {\n          this.errors.push(\n              TreeError.create(null, start.sourceSpan, `Invalid ICU message. Missing '}'.`));\n          return null;\n        }\n      }\n\n      if (this._peek.type === lex.TokenType.EOF) {\n        this.errors.push(\n            TreeError.create(null, start.sourceSpan, `Invalid ICU message. Missing '}'.`));\n        return null;\n      }\n\n      exp.push(this._advance());\n    }\n  }\n\n  private _consumeText(token: lex.Token) {\n    let text = token.parts[0];\n    if (text.length > 0 && text[0] == '\\n') {\n      const parent = this._getParentElement();\n      if (parent != null && parent.children.length == 0 &&\n          this.getTagDefinition(parent.name).ignoreFirstLf) {\n        text = text.substring(1);\n      }\n    }\n\n    if (text.length > 0) {\n      this._addToParent(new html.Text(text, token.sourceSpan));\n    }\n  }\n\n  private _closeVoidElement(): void {\n    const el = this._getParentElement();\n    if (el && this.getTagDefinition(el.name).isVoid) {\n      this._elementStack.pop();\n    }\n  }\n\n  private _consumeStartTag(startTagToken: lex.Token) {\n    const [prefix, name] = startTagToken.parts;\n    const attrs: html.Attribute[] = [];\n    while (this._peek.type === lex.TokenType.ATTR_NAME) {\n      attrs.push(this._consumeAttr(this._advance()));\n    }\n    const fullName = this._getElementFullName(prefix, name, this._getParentElement());\n    let selfClosing = false;\n    // Note: There could have been a tokenizer error\n    // so that we don't get a token for the end tag...\n    if (this._peek.type === lex.TokenType.TAG_OPEN_END_VOID) {\n      this._advance();\n      selfClosing = true;\n      const tagDef = this.getTagDefinition(fullName);\n      if (!(tagDef.canSelfClose || getNsPrefix(fullName) !== null || tagDef.isVoid)) {\n        this.errors.push(TreeError.create(\n            fullName, startTagToken.sourceSpan,\n            `Only void and foreign elements can be self closed \"${startTagToken.parts[1]}\"`));\n      }\n    } else if (this._peek.type === lex.TokenType.TAG_OPEN_END) {\n      this._advance();\n      selfClosing = false;\n    }\n    const end = this._peek.sourceSpan.fullStart;\n    const span = new ParseSourceSpan(\n        startTagToken.sourceSpan.start, end, startTagToken.sourceSpan.fullStart);\n    // Create a separate `startSpan` because `span` will be modified when there is an `end` span.\n    const startSpan = new ParseSourceSpan(\n        startTagToken.sourceSpan.start, end, startTagToken.