private void Build()
{
genGrammar.Text = "";
genLexer.Text = "";
genParser.Text = "";
Parser parser = new Parser();
Generator generator = new Generator();
Node<NodeType> node;
try
{
node = parser.Parse(grammarText.Text);
Grammar grammar = generator.BuildGrammar(node);
_grammarName = grammar.Name;
RefreshGrammar(grammar);
genLexer.Text = generator.GenerateLexer(grammar);
genParser.Text = generator.GenerateParser(grammar);
Compile();
}
catch (Exception exception)
{
_parser = null;
_parseMethod = null;
MessageBox.Show(exception.Message);
}
}
public void Sql()
{
var parser = new Core.GrammarGrammar.Parser();
var node = parser.Parse(@"Sql
defs
Statement : select StartOrFieldList
StartOrFieldList : star | FieldList
FieldList : FieldDef [comma FieldDef]
FieldDef : [Agg openBracket] Field [closeBracket]
Agg : count | min | max | avg
Field : [openSquare] Text [closeSquare]
texts
Text : "".*""
keywords
select: select
count: count
min: min
max: max
avg: avg
punctuation
star: ""*""
comma: ,
openBracket: (
closeBracket : )
openSquare: ""[""
closeSquare: ""]""");
var generator = new Generator();
var builder = new Builder();
string nodeTree = generator.GenerateNodeTree(node);
var grammar = generator.BuildGrammar(node);
string actual = GenerateAndBuildParser(grammar, "select abc def ghi");
}
private void Run(string grammarDef, string input, string expected)
{
var parser = new Core.GrammarGrammar.Parser();
var generator = new Generator();
var builder = new Builder();
var node = parser.Parse(grammarDef);
var tree= generator.GenerateNodeTree(node);
var grammar = generator.BuildGrammar(node);
string actual = GenerateAndBuildParser(grammar, input);
Assert.That(actual, Is.EqualTo(expected));
}
private string GenerateAndBuildParser(Grammar grammar, string text)
{
Generator generator = new Generator();
Builder builder = new Builder();
string lexerDef = generator.GenerateLexer(grammar);
string parserDef = generator.GenerateParser(grammar);
var assembly = builder.Build(lexerDef, parserDef);
object parser = Activator.CreateInstance(assembly.GetType("Xxx.Parser"));
object walker = Activator.CreateInstance(assembly.GetType("Xxx.Walker"));
var node = parser.GetType().GetMethod("Parse").Invoke(parser, new object[] { text });
return (string)walker.GetType().GetMethod("NodesToString").Invoke(walker, new[] { node });
}
