public void Binary()
{
var node = new ASTBinaryExpression()
{
Left = new ASTBinaryExpression()
{
Left = new ASTLiteral()
{
LiteralType = LiteralType.Double,
Value = 10.56d
},
Operator = BinaryOperatorType.Add,
Right = new ASTLiteral()
{
LiteralType = LiteralType.Double,
Value = 3.21d
}
},
Operator = BinaryOperatorType.Divide,
Right = new ASTLiteral()
{
LiteralType = LiteralType.Double,
Value = 2d
}
};
string result = node.Serialize();
Console.WriteLine(result);
}
// <signedfactor> ::= [ <addop> ] <factor>
private ASTAnyExpression ExpectSignedFactor()
{
ASTAnyExpression expression;
if (this.Scanner.CurrentToken == TokenType.PLUS
|| this.Scanner.CurrentToken == TokenType.MINUS)
{
ASTBinaryExpression binary = new ASTBinaryExpression();
binary.Left = new ASTLiteral()
{
LiteralType = LiteralType.Int32,
Value = 0
};
binary.Operator = this.ExpectAddOperator();
binary.Right = ExpectFactor();
expression = binary;
}
else
{
expression = ExpectFactor();
}
return expression;
}
public CodeObject Visit(ASTBinaryExpression expr)
{
CodeBinaryOperatorExpression result = new CodeBinaryOperatorExpression(
(CodeExpression)expr.Left.Accept(this),
GenerationUtils.MapBinaryOperator(expr.Operator),
(CodeExpression)expr.Right.Accept(this)
);
return(result);
}
// <expression> ::= <term> ( <addop> <term> )*
private ASTAnyExpression ExpectExpression()
{
ASTAnyExpression expression = this.ExpectTerm();
while (this.Scanner.CurrentToken == TokenType.PLUS
|| this.Scanner.CurrentToken == TokenType.MINUS)
{
ASTBinaryExpression binary = new ASTBinaryExpression();
binary.Left = expression;
binary.Operator = this.ExpectAddOperator();
binary.Right = this.ExpectTerm();
expression = binary;
}
return expression;
}
// <term> ::= <signedfactor> ( <mulop> <factor> )*
private ASTAnyExpression ExpectTerm()
{
ASTAnyExpression expression = this.ExpectSignedFactor();
while (this.Scanner.CurrentToken == TokenType.OCTOTHORPE
|| this.Scanner.CurrentToken == TokenType.FWDSLASH
|| this.Scanner.CurrentToken == TokenType.BCKSLASH
|| this.Scanner.CurrentToken == TokenType.CARRET)
{
ASTBinaryExpression binary = new ASTBinaryExpression();
binary.Left = expression;
binary.Operator = this.ExpectMulOperator();
binary.Right = this.ExpectFactor();
expression = binary;
}
return expression;
}
