99 lines
3.2 KiB
JavaScript
99 lines
3.2 KiB
JavaScript
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"use strict";
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exports.__esModule = true;
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exports.types = exports.TokContext = undefined;
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var _types = require("./types");
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var _whitespace = require("../util/whitespace");
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } // The algorithm used to determine whether a regexp can appear at a
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// given point in the program is loosely based on sweet.js' approach.
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// See https://github.com/mozilla/sweet.js/wiki/design
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var TokContext = exports.TokContext = function TokContext(token, isExpr, preserveSpace, override) {
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_classCallCheck(this, TokContext);
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this.token = token;
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this.isExpr = !!isExpr;
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this.preserveSpace = !!preserveSpace;
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this.override = override;
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};
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var types = exports.types = {
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braceStatement: new TokContext("{", false),
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braceExpression: new TokContext("{", true),
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templateQuasi: new TokContext("${", true),
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parenStatement: new TokContext("(", false),
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parenExpression: new TokContext("(", true),
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template: new TokContext("`", true, true, function (p) {
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return p.readTmplToken();
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}),
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functionExpression: new TokContext("function", true)
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};
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// Token-specific context update code
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_types.types.parenR.updateContext = _types.types.braceR.updateContext = function () {
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if (this.state.context.length === 1) {
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this.state.exprAllowed = true;
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return;
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}
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var out = this.state.context.pop();
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if (out === types.braceStatement && this.curContext() === types.functionExpression) {
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this.state.context.pop();
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this.state.exprAllowed = false;
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} else if (out === types.templateQuasi) {
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this.state.exprAllowed = true;
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} else {
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this.state.exprAllowed = !out.isExpr;
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}
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};
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_types.types.name.updateContext = function (prevType) {
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this.state.exprAllowed = false;
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if (prevType === _types.types._let || prevType === _types.types._const || prevType === _types.types._var) {
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if (_whitespace.lineBreak.test(this.input.slice(this.state.end))) {
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this.state.exprAllowed = true;
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}
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}
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};
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_types.types.braceL.updateContext = function (prevType) {
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this.state.context.push(this.braceIsBlock(prevType) ? types.braceStatement : types.braceExpression);
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this.state.exprAllowed = true;
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};
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_types.types.dollarBraceL.updateContext = function () {
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this.state.context.push(types.templateQuasi);
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this.state.exprAllowed = true;
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};
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_types.types.parenL.updateContext = function (prevType) {
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var statementParens = prevType === _types.types._if || prevType === _types.types._for || prevType === _types.types._with || prevType === _types.types._while;
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this.state.context.push(statementParens ? types.parenStatement : types.parenExpression);
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this.state.exprAllowed = true;
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};
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_types.types.incDec.updateContext = function () {
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// tokExprAllowed stays unchanged
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};
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_types.types._function.updateContext = function () {
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if (this.curContext() !== types.braceStatement) {
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this.state.context.push(types.functionExpression);
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}
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this.state.exprAllowed = false;
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};
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_types.types.backQuote.updateContext = function () {
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if (this.curContext() === types.template) {
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this.state.context.pop();
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} else {
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this.state.context.push(types.template);
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}
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this.state.exprAllowed = false;
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};
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