24 lines
536 B
JavaScript
24 lines
536 B
JavaScript
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"use strict";
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var GrammarError = require("../../grammar-error"),
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asts = require("../asts"),
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visitor = require("../visitor");
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/* Checks that all referenced rules exist. */
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function reportUndefinedRules(ast) {
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var check = visitor.build({
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rule_ref: function(node) {
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if (!asts.findRule(ast, node.name)) {
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throw new GrammarError(
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"Rule \"" + node.name + "\" is not defined.",
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node.location
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);
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}
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}
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});
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check(ast);
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}
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module.exports = reportUndefinedRules;
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