public void Encode(ASTProduct node)
{
NumExpr rhs = m_stack.Pop();
NumExpr lhs = m_stack.Pop();
m_stack.Push(new NumExpr(lhs.IsTrueValue && rhs.IsTrueValue, lhs.Value * rhs.Value, String.Format("{0} * {1}", lhs.Code, rhs.Code)));
}
//<Num Term> ::= <Num Term> '*' <Num Unary>
// | <Num Term> '/' <Num Unary>
// | <Num Unary>
private ASTNode GetNumTerm(string scaleName, NumericType numType)
{
ASTNode lhs = GetNumUnary(scaleName, numType);
if (lhs == null)
{
return(null);
}
while ((m_symbol == Lexer.Symbol.Times) || (m_symbol == Lexer.Symbol.Div))
{
Lexer.Symbol operation = m_symbol;
GetToken();
ASTNode rhs = GetNumUnary(scaleName, numType);
if (rhs == null)
{
return(null);
}
else if (operation == Lexer.Symbol.Times)
{
lhs = new ASTProduct(lhs, rhs);
}
else
{
lhs = new ASTQuotient(lhs, rhs);
}
}
return(lhs);
}
//<Dim Term> ::= <Dim Term> '*' <Dim Factor>
// | <Dim Term> '^' <Dim Factor>
// | <Dim Term> '/' <Dim Factor>
// | <Dim Factor>
private ASTNode GetDimTerm(UnitType candidate, NumericType numType)
{
ASTNode lhs = GetDimFactor(candidate, numType);
if (lhs == null)
{
return(null);
}
while ((m_symbol == Lexer.Symbol.Times) || (m_symbol == Lexer.Symbol.Div) || (m_symbol == Lexer.Symbol.Wedge))
{
Lexer.Symbol operatorSymbol = m_symbol;
string operatorToken = m_token;
int operatorLine = m_lexer.TokenLine;
int operatorColumn = m_lexer.TokenColumn;
GetToken();
ASTNode rhs = GetDimFactor(candidate, numType);
if (rhs == null)
{
return(null);
}
else if (operatorSymbol == Lexer.Symbol.Div)
{
lhs = new ASTQuotient(lhs, rhs);
}
else if (operatorSymbol == Lexer.Symbol.Times)
{
lhs = new ASTProduct(lhs, rhs, iswedgeproduct: false);
}
else if (lhs.IsWedgeCompatible && rhs.IsWedgeCompatible)
{
lhs = new ASTProduct(lhs, rhs, iswedgeproduct: true);
}
else
{
string denote = "\u02C7\u02C7\u02C7{0}\u02C7\u02C7\u02C7"; // ˇˇˇexprˇˇˇ
Note(operatorLine, operatorColumn, operatorToken,
String.Format("{0}: wedge product incompatible factor(s): {1} ^ {2}.", candidate.Name,
lhs.IsWedgeCompatible ? lhs.ToString() : String.Format(denote, lhs),
rhs.IsWedgeCompatible ? rhs.ToString() : String.Format(denote, rhs)
)
);
return(null);
}
}
return(lhs);
}
public void Encode(ASTProduct node)
{
SenseExpr rhs = m_stack.Pop();
SenseExpr lhs = m_stack.Pop();
if (lhs.Value == Dimension.None)
{
m_stack.Push(new SenseExpr(rhs.Value, rhs.Code));
}
else if (rhs.Value == Dimension.None)
{
m_stack.Push(new SenseExpr(lhs.Value, lhs.Code));
}
else
{
m_stack.Push(new SenseExpr(lhs.Value * rhs.Value, String.Format("{0} * {1}", lhs.Code, rhs.Code)));
}
}
// [Lhs * Rhs] * number
public override ASTNode TryMultiply(ASTNode number)
{
if (Lhs.IsNumeric)
{
// [Lhs * Rhs] * number --> [Lhs * number] * Rhs
ASTNode product = new ASTProduct(Lhs, number);
ASTNode normalized = Rhs.TryMultiply(product);
return((normalized != null) ? normalized : new ASTProduct(product, Rhs));
}
if (Rhs.IsNumeric)
{
// [Lhs * Rhs] * number --> Lhs * [Rhs * number]
ASTNode product = new ASTProduct(Rhs, number);
ASTNode normalized = Lhs.TryMultiply(product);
return((normalized != null) ? normalized : new ASTProduct(Lhs, product));
}
return(null);
}