public void ParseTest()
{
LexicalRule digit = LexicalRule.Range('0', '9');
LexerBuilder lexb = new LexerBuilder();
var blank = lexb.DefineLexeme(0, true, LexicalRule.Chars(" \n\t\r").Repeat());
var number = lexb.DefineLexeme(1, digit.Repeat() + (LexicalRule.Char('.') + digit.Repeat() | LexicalRule.Empty));
var plus = lexb.DefineLexeme(2, LexicalRule.Char('+'));
var minus = lexb.DefineLexeme(2, LexicalRule.Char('-'));
var times = lexb.DefineLexeme(2, LexicalRule.Char('*'));
var divide = lexb.DefineLexeme(2, LexicalRule.Char('/'));
var bra = lexb.DefineLexeme(3, LexicalRule.Char('('));
var ket = lexb.DefineLexeme(3, LexicalRule.Char(')'));
var plu = plus.GetParsingRule();
var min = minus.GetParsingRule();
var mul = times.GetParsingRule();
var div = divide.GetParsingRule();
var br = bra.GetParsingRule();
var ke = ket.GetParsingRule();
var num = number.GetParsingRule(i => double.Parse(i.Text));
ParsingRuleContainer <double> expr = new ParsingRuleContainer <double>();
ParsingRuleContainer <double> term = new ParsingRuleContainer <double>();
ParsingRuleContainer <double> factor = new ParsingRuleContainer <double>();
// ParsingRuleContainer<int, double> bracket = new ParsingRuleContainer<int, double>();
expr.Content
= term.Concat((plu.Concat(term, (t, y) => y) | min.Concat(term, (t, y) => - y)).Repeat(i => i.Sum()), (x, y) => x + y)
| term;
term.Content
= factor.Concat((mul.Concat(term, (s, y) => y) | (div.Concat(term, (s, y) => 1 / y))).Repeat(t => t.Count() == 0 ? 1 : t.Aggregate((x, y) => x * y)), (x, y) => x * y)
| factor;
factor.Content
= br.Concat(expr, (s, x) => x).Concat(ke, (x, s) => x)
| num;
string str = "1 * 5 + 2 * 3 / 5 - 3";
BranchedLexer lexer = lexb.GetBranchedLexer(str);
double r;
expr.TryParse(lexer, out r);
Assert.AreEqual(1.0 * 5.0 + 2.0 * 3.0 / 5.0 - 3.0, r);
}
private void InitializeMemberParsers()
{
var modifier
= lex_kw_public.GetParsingRule(t => Modifier.Public)
| lex_kw_private.GetParsingRule(t => Modifier.Private)
| lex_kw_protected.GetParsingRule(t => Modifier.Protected)
| ParsingRule <Modifier> .Empty(Modifier.Public);
var mem_modifier
= lex_kw_static.GetParsingRule(t => true)
.Concat(modifier, (t, u) => Tuple.Create(t, u))
| modifier
.Concat(lex_kw_static.GetParsingRule(t => true) | ParsingRule <bool> .Empty(false), (u, t) => Tuple.Create(t, u))
| ParsingRule <Tuple <bool, Modifier> > .Empty(Tuple.Create(false, Modifier.Public));
var mem_field
= (lex_op_assign.GetParsingRule()
.Concat(p_expression.OrFail(ExceptionResource.ExpressionExpected), (t, e) => e)
| PCE.Empty(null))
.Map(e => Tuple.Create(0, e, (ParameterCollection)null, (StatementCollection)null,
(Tuple <Accessor, Accessor>)null));
var mem_method
= p_paras
.Concat(p_stats.OrFail(ExceptionResource.StatementsExpected),
(t, stats) => Tuple.Create(1, (Expression)null, t, stats,
(Tuple <Accessor, Accessor>)null));
var mem_constructor
= lex_kw_constructor.GetParsingRule()
.Concat(p_paras.OrFail(ExceptionResource.ParemetersExpected), (t, paras) => paras)
.Concat(p_stats.OrFail(ExceptionResource.StatementsExpected),
(t, stats) => Tuple.Create(2, (Expression)null, t, stats,
(Tuple <Accessor, Accessor>)null));
var modifier1
= lex_kw_public.GetParsingRule(t => (Modifier?)Modifier.Public)
| lex_kw_private.GetParsingRule(t => (Modifier?)Modifier.Private)
| lex_kw_protected.GetParsingRule(t => (Modifier?)Modifier.Protected)
| ParsingRule <Modifier?> .Empty(null);
var getter
= modifier1
.Concat(lex_kw_get.GetParsingRule(), (t, g) => Tuple.Create(t, g))
.Concat(
lex_op_semicolon.GetParsingRule(t => (StatementCollection)null)
| p_stats.OrFail(ExceptionResource.StatementsExpected),
(t, stats) => new Accessor(t.Item2.LinePragma, t.Item1, stats));
var setter
= modifier1
.Concat(lex_kw_set.GetParsingRule(), (t, g) => Tuple.Create(t, g))
.Concat(
lex_op_semicolon.GetParsingRule(t => (StatementCollection)null)
| p_stats.OrFail(ExceptionResource.StatementsExpected),
(t, stats) => new Accessor(t.Item2.LinePragma, t.Item1, stats));
var prop_stats
= getter.Concat(setter | ParsingRule <Accessor> .Empty(null), (g, s) => Tuple.Create(g, s))
| setter.Concat(getter | ParsingRule <Accessor> .Empty(null), (s, g) => Tuple.Create(g, s));
var mem_property
= lex_op_leftBrace.GetParsingRule()
.Concat(prop_stats, (t, s) => s)
.Concat(lex_op_rightBrace.GetParsingRule().OrFailExpected("}"), (t, b) => t)
.Map(t =>
{
return(Tuple.Create(3, (Expression)null, (ParameterCollection)null, (StatementCollection)null, t));
});
ParsingRule <Tuple <int, Expression, ParameterCollection, StatementCollection, Tuple <Accessor, Accessor> > > mem_indexer
= lex_kw_this.GetParsingRule()
.Concat(lex_op_leftBracket.GetParsingRule(), (t, b) => t)
.Concat(p_paraList, (t, p) => p)
.Concat(lex_op_rightBracket.GetParsingRule().OrFailExpected("]"), (t, b) => t)
.Concat(lex_op_leftBrace.GetParsingRule().OrFailExpected("{"), (t, b) => t)
.Concat(prop_stats, (t, s) => Tuple.Create(t, s))
.Concat(lex_op_rightBrace.GetParsingRule().OrFailExpected("}"), (t, b) => t)
.Map(t =>
{
return(Tuple.Create(4, (Expression)null, t.Item1, (StatementCollection)null, t.Item2));
});
p_linePragma.Content
= ParsingRuleContainer <LinePragma> .Custom(lexer =>
{
var t = lexer.Peek();
if (t != null)
{
return(Tuple.Create(true, t.LinePragma));
}
else
{
return(Tuple.Create(false, (LinePragma)null));
}
});
p_member.Content
= p_linePragma
.Concat(mem_modifier, (t, m) => Tuple.Create(t, m))
.Concat(
mem_constructor.Map((t) => Tuple.Create((Token)null, t))
| lex_identifer.GetParsingRule()
.Concat(mem_method | mem_property | mem_field,
(t, m) => Tuple.Create(t, m))
| mem_indexer.Map(t => Tuple.Create((Token)null, t)),
(t, m) =>
{
var lp = t.Item1;
var mod = t.Item2;
var type = m.Item2.Item1;
var id = m.Item1;
var exp = m.Item2.Item2;
var para = m.Item2.Item3;
var stat = m.Item2.Item4;
var getset = m.Item2.Item5;
if (type == 0)
{
return((Member) new Field(lp, mod.Item1, mod.Item2, id.Text, exp));
}
else if (type == 1)
{
return((Member) new Method(lp, mod.Item1, mod.Item2, id.Text, para, stat));
}
else if (type == 2)
{
return((Member) new Constructor(lp, mod.Item1, mod.Item2, para, stat));
}
else if (type == 3)
{
var g = getset.Item1;
var s = getset.Item2;
return((Member) new Property(lp, mod.Item1, mod.Item2, id.Text, g, s));
}
else if (type == 4)
{
var g = getset.Item1;
var s = getset.Item2;
return((Member) new Indexer(lp, mod.Item1, mod.Item2, para, g, s));
}
else
{
throw new Exception();
}
});
var member_semicolon
= PM.Custom(lex =>
{
Member m;
if (p_member.TryParse(lex, out m))
{
if (m is Field)
{
var t = lex.Peek();
if (t == null)
{
return(Tuple.Create(true, m));
}
else if (t.Lexeme == lex_op_semicolon)
{
lex.Read();
return(Tuple.Create(true, m));
}
else if (t.Lexeme == lex_op_rightBrace)
{
return(Tuple.Create(true, m));
}
else if (t.LinePragma.Line > m.LinePragma.Line)
{
return(Tuple.Create(true, m));
}
else
{
Util.Fail <Member>(string.Format(ExceptionResource.Expected, ";")).TryParse(lex, out m);
}
}
else
{
return(Tuple.Create(true, m));
}
}
return(Tuple.Create(false, (Member)null));
});
p_members.Content
= member_semicolon.Repeat(i => new MemberCollection(i));
}