24 lines
510 B
JavaScript
24 lines
510 B
JavaScript
"use strict";
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let GrammarError = require("../../grammar-error");
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let asts = require("../asts");
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let visitor = require("../visitor");
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// Checks that all referenced rules exist.
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function reportUndefinedRules(ast) {
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let check = visitor.build({
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rule_ref(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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