29 lines
699 B
JavaScript
29 lines
699 B
JavaScript
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// Node-only
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var warn = function (opts, str) {
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opts.out.write("WARN"+"\t" + str + "\n");
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}
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function lintNames(grm, opts) {
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var all = [];
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grm.rules.forEach(function(rule) {
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all.push(rule.name);
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});
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grm.rules.forEach(function(rule) {
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rule.symbols.forEach(function(symbol) {
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if (!symbol.literal && !symbol.token && symbol.constructor !== RegExp) {
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if (all.indexOf(symbol) === -1) {
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warn(opts,"Undefined symbol `" + symbol + "` used.");
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}
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}
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});
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});
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}
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function lint(grm, opts) {
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if (!opts.out) opts.out = process.stderr;
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lintNames(grm, opts);
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}
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module.exports = lint;
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