public void Simple()
{
var input = " hello ( parsing world ) ";
// optional repeating whitespace
var ws = Terminals.WhiteSpace.Repeat(0);
// parse a value with or without brackets
var valueParser = Terminals.Set('(')
.Then(Terminals.Set(')').Inverse().Repeat().Until(ws.Then(')')).Named("value"))
.Then(Terminals.Set(')'))
.SeparatedBy(ws)
.Or(Terminals.WhiteSpace.Inverse().Repeat().Named("value"));
// our grammar
var grammar = new Grammar(
ws
.Then(valueParser.Named("first"))
.Then(valueParser.Named("second"))
.Then(Terminals.End)
.SeparatedBy(ws)
);
var match = grammar.Match(input);
Assert.IsTrue(match.Success, match.ErrorMessage);
Assert.AreEqual("hello", match["first"]["value"].Text);
Assert.AreEqual("parsing world", match["second"]["value"].Text);
}
/// <summary>
/// Initializes a new copy of the <see cref="Eto.Parse.Grammar"/> class
/// </summary>
/// <param name="other">Other object to copy</param>
/// <param name="args">Arguments for the copy</param>
protected Grammar(Grammar other, ParserCloneArgs args)
{
this.EnableMatchEvents = other.EnableMatchEvents;
this.Separator = args.Clone(other.Separator);
this.CaseSensitive = other.CaseSensitive;
this.Optimizations = other.Optimizations;
}
public void Except()
{
var ch = Terminals.AnyChar.Except(Terminals.WhiteSpace).Repeat();
var input = "abc def 1234";
var repeat = new Grammar(ch) { AllowPartialMatch = true };
var match = repeat.Match(input);
Assert.IsTrue(match.Success);
Assert.AreEqual("abc", match.Text);
}
public void RepeatUntil()
{
var input = "abc def 1234";
// optional repeating whitespace
var ws = Terminals.WhiteSpace.Repeat(0);
// repeat until we get a digit, and exclude any whitespace inbetween
var repeat = new Grammar(Terminals.AnyChar.Repeat().Until(ws.Then(Terminals.Digit))) { AllowPartialMatch = true };
var match = repeat.Match(input);
Assert.IsTrue(match.Success);
Assert.AreEqual("abc def", match.Text);
}
public void RepeatUntil()
{
var input = "abc def 1234";
// optional repeating whitespace
var ws = -Terminals.WhiteSpace;
// repeat until we get a digit, and exclude any whitespace inbetween
var repeat = +Terminals.AnyChar ^ (ws & Terminals.Digit);
var match = new Grammar(repeat) { AllowPartialMatch = true }.Match(input);
Assert.IsTrue(match.Success, match.ErrorMessage);
Assert.AreEqual("abc def", match.Text);
}
public void Simple()
{
var input = " hello ( parsing world ) ";
// optional repeating whitespace
var ws = -Terminals.WhiteSpace;
// parse a value with or without brackets
Parser valueParser =
('(' & ws & (+Terminals.AnyChar ^ (ws & ')')).Named("value") & ws & ')')
| (+!Terminals.WhiteSpace).Named("value");
// our grammar
var grammar = new Grammar(ws & valueParser.Named("first") & ws & valueParser.Named("second") & ws & Terminals.End);
var match = grammar.Match(input);
Assert.IsTrue(match.Success);
Assert.AreEqual("hello", match["first"]["value"].Text);
Assert.AreEqual("parsing world", match["second"]["value"].Text);
}
public Parser(string textGrammar, string root_rule, EbnfStyle style)
{
var ebnfGrammar = new Eto.Parse.Grammars.EbnfGrammar( style );
myGrammar = ebnfGrammar.Build(textGrammar, root_rule);
myGrammar.CheckAbsentRules ();
}
internal ParseArgs(Grammar grammar, Scanner scanner)
{
Grammar = grammar;
Scanner = scanner;
}
public static void TestAddress(Grammar addressParser)
{
TestAddress(addressParser.Match(Address));
}
void SetEbnfRules(Grammar myEbnf)
{
// EBNF spec does not identify terminals and other special rules, so we define them here so we can round
// trip the original defintion.
// For you own grammars, there is an extension of the EbnfGrammar that allows you to define terminals
// by using := instead of = for your rule.
myEbnf["meta identifier"].SeparateChildrenBy(-Terminals.SingleLineWhiteSpace);
myEbnf["integer"].SeparateChildrenBy(null);
myEbnf["terminal string"].SeparateChildrenBy(null);
}
public IfBlocksParser()
{
_grammar = BuildGrammar();
}
