chevrotain/lib/src/parse/grammar/resolver.js

Chevrotain is a high performance fault tolerant javascript parsing DSL for building recursive decent parsers

"use strict";
var __extends = (this && this.__extends) || (function () {
    var extendStatics = Object.setPrototypeOf ||
        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
Object.defineProperty(exports, "__esModule", { value: true });
var parser_public_1 = require("../parser_public");
var utils_1 = require("../../utils/utils");
var gast_visitor_public_1 = require("./gast/gast_visitor_public");
var errors_public_1 = require("../errors_public");
function resolveGrammar(topLevels, errMsgProvider) {
    if (errMsgProvider === void 0) { errMsgProvider = errors_public_1.defaultGrammarResolverErrorProvider; }
    var refResolver = new GastRefResolverVisitor(topLevels, errMsgProvider);
    refResolver.resolveRefs();
    return refResolver.errors;
}
exports.resolveGrammar = resolveGrammar;
var GastRefResolverVisitor = /** @class */ (function (_super) {
    __extends(GastRefResolverVisitor, _super);
    function GastRefResolverVisitor(nameToTopRule, errMsgProvider) {
        var _this = _super.call(this) || this;
        _this.nameToTopRule = nameToTopRule;
        _this.errMsgProvider = errMsgProvider;
        _this.errors = [];
        return _this;
    }
    GastRefResolverVisitor.prototype.resolveRefs = function () {
        var _this = this;
        utils_1.forEach(this.nameToTopRule.values(), function (prod) {
            _this.currTopLevel = prod;
            prod.accept(_this);
        });
    };
    GastRefResolverVisitor.prototype.visitNonTerminal = function (node) {
        var ref = this.nameToTopRule.get(node.nonTerminalName);
        if (!ref) {
            var msg = this.errMsgProvider.buildRuleNotFoundError(this.currTopLevel, node);
            this.errors.push({
                message: msg,
                type: parser_public_1.ParserDefinitionErrorType.UNRESOLVED_SUBRULE_REF,
                ruleName: this.currTopLevel.name,
                unresolvedRefName: node.nonTerminalName
            });
        }
        else {
            node.referencedRule = ref;
        }
    };
    return GastRefResolverVisitor;
}(gast_visitor_public_1.GAstVisitor));
exports.GastRefResolverVisitor = GastRefResolverVisitor;
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