Statement ParseMemberAssignmentOrMethodCallStatement(string variable)
{
// assignment:
// {variable} = {value}
string dotType = fCurrentToken.Value;
ReadNextToken(); // skip '.'
MemberAccess ma = new MemberAccess(new Variable(variable, "var"), ParseDotExpression());
if (dotType == "[")
SkipExpected(TokenType.Symbol, "]");
if (ma.RightChildExpression is MethodCall)
return new MethodCallStatement(ma);
else if(ma.RightChildExpression is FunctionCall)
return new MethodCallStatement(ma);
else
return ParseMemberAssignment(ma, fCurrentToken.Value);
}
Expression ParseDotExpression()
{
// DOT-expression:
// {unary-expression} . {functionCallOrVariable}
Expression lNode = ParseBaseExpression();
while (!AtEndOfSource && (fCurrentToken.Value == "." || fCurrentToken.Value == "["))
{
string currToken = fCurrentToken.Value;
if (currToken == ".")
{
ReadNextToken(); // skip '.'
//if (fCurrentToken.Value == "$=")
// return lNode;
Expression exp = ParseVariableOrFunctionCall();
if (exp is FunctionCall)
lNode = new MethodCall(lNode, exp);
else
lNode = new MemberAccess(lNode, exp);
}
else
{
ReadNextToken(); // skip '['
lNode = new IndexerAccess(lNode, ParseExpression());
SkipExpected(TokenType.Symbol, "]");
}
}
return lNode;
}
MemberAssignment ParseMemberAssignment(MemberAccess variable, string op)
{
// assignment:
// {variable} += {value}
ReadNextToken(); // skip '+='
MemberAssignment a = null;
if (op == "++" || op == "--")
a = new MemberAssignment(variable, op, null);
else
a = new MemberAssignment(variable, op, ParseExpression());
return a;
}
public override object Calculate(Context context, ParserNode parentNode)
{
object res = LeftChildExpression.Calculate(context, this);
// eğer sonuç null ve LeftExp variable ise static call olabilir
if (res == null && LeftChildExpression is Variable)
{
string className = (LeftChildExpression as Variable).Name;
Type t = Context.GetType(className, context.Using);
if (t != null)
{
if (RightChildExpression is Variable)
{
string propName = (RightChildExpression as Variable).Name;
PropertyInfo pi = t.GetProperty(propName, BindingFlags.Static | BindingFlags.Public);
if (pi != null)
res = pi.GetValue(null, null);
else
{
FieldInfo fi = t.GetField(propName);
if (fi != null)
res = fi.GetValue(null);
else
res = "";
}
}
else if (RightChildExpression is FunctionCall)
{
FunctionCall fc = (FunctionCall)RightChildExpression;
object[] paramValues = new object[fc.Arguments.Length];
Type[] paramTypes = new Type[fc.Arguments.Length];
int i = 0;
foreach (Expression exp in fc.Arguments)
{
paramValues[i] = exp.Calculate(context, this);
paramTypes[i] = paramValues[i]==null ? null : paramValues[i].GetType();
i++;
}
//MethodInfo mi = t.GetMethod(fc.Name, BindingFlags.Static | BindingFlags.Public, null, paramTypes, null);
MethodInfo mi = null; ParameterInfo[] arrPi;
FindMethod(t, fc.Name, paramTypes, out mi, out arrPi, BindingFlags.Static | BindingFlags.Public);
if (mi == null)
throw new Exception("Undefined param types for static method: " + this);
else
res = mi.Invoke(null, paramValues);
}
else if (RightChildExpression is MemberAccess)
{
res = new MemberAccess(new MemberAccess(this.LeftChildExpression, (this.RightChildExpression as MemberAccess).LeftChildExpression), (this.RightChildExpression as MemberAccess).RightChildExpression).Calculate(context, this);
}
else
res = null;
}
else
throw new Exception("Undefined static method: " + this);
}
else if (RightChildExpression is MemberAccess)
{
res = new MemberAccess(new MemberAccess(this.LeftChildExpression, (this.RightChildExpression as MemberAccess).LeftChildExpression), (this.RightChildExpression as MemberAccess).RightChildExpression).Calculate(context, this);
}
else if (RightChildExpression is FunctionCall)
{
FunctionCall fc = (FunctionCall)RightChildExpression;
List<object> paramValues = new List<object>();
List<Type> paramTypes = new List<Type>();
int i = 0;
foreach (Expression exp in fc.Arguments)
{
paramValues.Add(exp.Calculate(context, this));
paramTypes.Add(paramValues[i] == null ? typeof(object) : paramValues[i].GetType());
i++;
}
if (res is string) {
switch (fc.Name.ToLowerInvariant())
{
case "split":
return res.ToString().Split(new string[] { paramValues[0].ToString() }, StringSplitOptions.RemoveEmptyEntries);
}
}
//MethodInfo mi = res.GetType().GetMethod(fc.Name, paramTypes);
MethodInfo mi = null;
ParameterInfo[] pinfo = null;
FindMethod(res.GetType(), fc.Name, paramTypes.ToArray(), out mi, out pinfo);
if (mi == null)
throw new Exception("Undefined method: " + this);
else
{
if (mi.GetParameters().Length > paramTypes.Count)
{
paramTypes.Add(typeof(object[]));
paramValues.Add(new object[0]);
}
for (int j = 0; j < paramTypes.Count; j++)
{
try
{
if(!paramTypes[j].IsSubclassOf(pinfo[j].ParameterType))
paramValues[j] = paramValues[j].ChangeType(pinfo[j].ParameterType);
}
catch
{
throw new Exception("Cannot convert from " + paramValues[j].GetType().Name + " to " + pinfo[j].ParameterType.Name + " or undefined method: " + this);
}
}
res = mi.Invoke(res, paramValues.ToArray());
}
}
else if (RightChildExpression is Variable)
{
Variable var = (Variable)RightChildExpression;
PropertyInfo pi = res.GetType().GetProperty(var.Name);
if (pi != null)
{
try
{
res = pi.GetValue(res, null);
}
catch(Exception ex)
{
throw new Exception("Property found but couldnt be read: " + this + " (" + (ex.InnerException != null ? ex.InnerException.Message : ex.Message) + ")");
}
}
else
{
FieldInfo fi = res.GetType().GetField(var.Name);
if (fi != null)
{
try
{
res = fi.GetValue(res);
}
catch(Exception ex)
{
throw new Exception("Field found but couldnt be read: " + this + " (" + (ex.InnerException != null ? ex.InnerException.Message : ex.Message) + ")");
}
}
else
{
MethodInfo mi = res.GetType().GetMethod("get_Item", new Type[] { typeof(string) });
if (mi != null)
{
try
{
object paramObj = var.Name.ChangeType(mi.GetParameters()[0].ParameterType);
res = mi.Invoke(res, new object[] { paramObj });
}
catch(Exception ex)
{
throw new Exception("Indexer found but couldnt be read: " + this + " (" + (ex.InnerException != null ? ex.InnerException.Message : ex.Message) + ")");
}
}
else
throw new Exception("Undefined property, field or indexer parameter: " + this);
}
}
}
else
{
object val = RightChildExpression.Calculate(context, this);
if (val.IsNumeric() && res.GetType() == typeof(string))
res = res.ToString()[Convert.ToInt32(val)];
else
res = res.GetIndexedValue(val);
}
return res;
}
