private static string GetCode(CommandLineOptions opts)
{
switch (Path.GetExtension(opts.GrammarFile)) {
case ".bnf":
var gr = new BnfGrammar();
return gr.ToCode(File.ReadAllText(opts.GrammarFile), opts.StartParser, opts.GrammarName);
case ".ebnf":
var egr = new EbnfGrammar(EbnfStyle.W3c | EbnfStyle.SquareBracketAsOptional | EbnfStyle.WhitespaceSeparator);
return egr.ToCode(File.ReadAllText(opts.GrammarFile), opts.StartParser, opts.GrammarName);
case ".gold":
var ggr = new GoldGrammar();
return ggr.ToCode(File.ReadAllText(opts.GrammarFile), opts.GrammarName);
}
throw new Exception("Unknown Grammar. Try .ebnf .bnf .gold");
}
public void ToCode()
{
// test a round trip to code
var code = new GoldGrammar().ToCode(goldBnf, "MyGoldGrammar");
// execute generated code
var generatedGoldParser = Helper.Create<Grammar>(code, "MyGoldGrammar");
// match using generated parser
var match = generatedGoldParser.Match(goldBnf);
Assert.IsTrue(match.Success, "Error: {0}", match.ErrorMessage);
// check rules
var rules = match.Find("Rule Decl", true).Select(r => r["Nonterminal"].Text.TrimStart('<').TrimEnd('>')).ToArray();
CollectionAssert.AreEquivalent(GOLD_RULES, rules);
}
public void TestParsing()
{
var goldParser = new GoldGrammar();
var definition = goldParser.Build(goldBnf);
// check rules
CollectionAssert.AreEquivalent(GOLD_RULES, definition.Rules.Keys);
}