public double Calculate(string input)
{
Token EofToken = new Token {
Type = TT.EOF
};
var lexer = new CalculatorLexer(input);
Src = new ParserSource <Token>(lexer, EofToken, lexer.Src.SourceFile)
{
TokenTypeToString = tt => ((TT)tt).ToString()
};
var result = ExprSequence();
Src.Match((int)TT.EOF);
return(result);
}
double Atom()
{
TokenType la0, la1;
#line 215 "Grammars.ecs"
double result;
#line default
// Line 216: ( TT.Id | TT.Num | TT.LParen Expr TT.RParen )
la0 = (TokenType)_src.LA0;
if (la0 == TT.Id)
{
var t = _src.MatchAny();
#line 216 "Grammars.ecs"
result = Vars[(string)t.Value];
#line default
}
else if (la0 == TT.Num)
{
var t = _src.MatchAny();
#line 217 "Grammars.ecs"
result = (double)t.Value;
#line default
}
else if (la0 == TT.LParen)
{
_src.Skip();
result = Expr();
_src.Match((int)TT.RParen);
}
else
{
#line 219 "Grammars.ecs"
result = double.NaN;
#line 219 "Grammars.ecs"
_src.Error(0, "Expected identifer, number, or (parens)");
#line default
}
// Line 222: greedy(TT.Exp Atom)*
for (;;)
{
la0 = (TokenType)_src.LA0;
if (la0 == TT.Exp)
{
la1 = (TokenType)_src.LA(1);
if (la1 == TT.Id || la1 == TT.LParen || la1 == TT.Num)
{
_src.Skip();
var exp = Atom();
#line 222 "Grammars.ecs"
result = Math.Pow(result, exp);
#line default
}
else
{
break;
}
}
else
{
break;
}
}
#line 223 "Grammars.ecs"
return(result);
#line default
}