_ParamInfo[] _GetParamInfos(CodeExpressionCollection parms, CodeDomResolverScope scope = null)
{
var result = new _ParamInfo[parms.Count];
for (var i = 0; i < result.Length; i++)
{
CodeExpression e = parms[i];
_ParamInfo p = default(_ParamInfo);
p.IsOptional = false;
p.IsRetval = false;
var de = e as CodeDirectionExpression;
if (null != de)
{
switch (de.Direction)
{
case FieldDirection.In:
break;
case FieldDirection.Out:
p.IsOut = true;
break;
case FieldDirection.Ref:
p.IsIn = p.IsOut = true;
break;
}
e = de.Expression;
}
p.ParameterType = _resolver.GetTypeOfExpression(e, _scope);
result[i] = p;
}
return(result);
}
/// <summary>
/// Attempts to return the type of the specified expression using the specified scope
/// </summary>
/// <param name="expr">The expression to evaluate</param>
/// <param name="scope">The scope to use, or null to use the expression's current scope</param>
/// <returns>A <see cref="CodeTypeReference"/> representing the type of the expression or null if it could not be retrieved</returns>
public CodeTypeReference TryGetTypeOfExpression(CodeExpression expr, CodeDomResolverScope scope = null)
{
// reimplementing a try version of this is a lot of code, and frankly, the resolution takes so much
// longer than any exception handling that this is acceptable in this case.
try
{
return(GetTypeOfExpression(expr, scope));
}
catch (Exception) { return(null); }
}
Type _EvalType(CodeTypeReference r, CodeDomResolverScope s)
{
if (null == s)
{
s = GetScope(r);
}
var t = _ResolveType(r, s);
if (null == t)
{
throw new TypeLoadException("The type could not be resolved");
}
var result = t as Type;
if (null == result)
{
throw new NotSupportedException("Only runtime types may be evaluated");
}
return(result);
}
_ParamInfo[] _GetParamInfos(CodeParameterDeclarationExpressionCollection parms, CodeDomResolverScope scope = null)
{
var result = new _ParamInfo[parms.Count];
for (var i = 0; i < result.Length; i++)
{
_ParamInfo p = default(_ParamInfo);
p.IsOptional = false;
p.IsRetval = false;
p.Name = parms[i].Name;
p.DefaultValue = DBNull.Value;
var pd = parms[i];
switch (pd.Direction)
{
case FieldDirection.In:
break;
case FieldDirection.Out:
p.IsOut = true;
break;
case FieldDirection.Ref:
p.IsIn = p.IsOut = true;
break;
}
p.ParameterType = pd.Type;
if (null != scope)
{
p.ParameterType = _resolver.GetQualifiedType(pd.Type, scope);
}
result[i] = p;
}
return(result);
}
/// <summary>
/// Initializes the binder with the given scope
/// </summary>
/// <param name="scope">The scope in which the binder is to operate</param>
public CodeDomBinder(CodeDomResolverScope scope)
{
_resolver = scope.Resolver;
_scope = scope;
}
/// <summary>
/// Gets the type of the specified expression, at the optional given scope
/// </summary>
/// <param name="expr">The expression to evaluate</param>
/// <param name="scope">The scope at which evaluation occurs, or null to use the expression's scope</param>
/// <returns>A <see cref="CodeTypeReference"/> representing the type of the expression</returns>
public CodeTypeReference GetTypeOfExpression(CodeExpression expr, CodeDomResolverScope scope = null)
{
if (null == expr)
{
throw new ArgumentNullException(nameof(expr));
}
// first let's do the easy ones.
var cpe = expr as CodePrimitiveExpression;
if (null != cpe)
{
if (null == cpe.Value)
{
return(new CodeTypeReference(typeof(void)));
}
return(new CodeTypeReference(cpe.Value.GetType()));
}
var cbe = expr as CodeBinaryOperatorExpression;
if (null != cbe)
{
switch (cbe.Operator)
{
case CodeBinaryOperatorType.BooleanAnd:
case CodeBinaryOperatorType.BooleanOr:
case CodeBinaryOperatorType.GreaterThan:
case CodeBinaryOperatorType.GreaterThanOrEqual:
case CodeBinaryOperatorType.IdentityEquality:
case CodeBinaryOperatorType.IdentityInequality:
case CodeBinaryOperatorType.LessThan:
case CodeBinaryOperatorType.LessThanOrEqual:
case CodeBinaryOperatorType.ValueEquality:
return(new CodeTypeReference(typeof(bool)));
case CodeBinaryOperatorType.Assign:
case CodeBinaryOperatorType.Add:
case CodeBinaryOperatorType.Subtract:
case CodeBinaryOperatorType.Multiply:
case CodeBinaryOperatorType.Divide:
case CodeBinaryOperatorType.Modulus:
case CodeBinaryOperatorType.BitwiseAnd:
case CodeBinaryOperatorType.BitwiseOr:
return(_PromoteType(GetTypeOfExpression(cbe.Left), GetTypeOfExpression(cbe.Right)));
}
}
var tr = expr as CodeTypeReferenceExpression;
if (null != tr)
{
if (null == tr.Type)
{
throw new InvalidOperationException("The type reference expression had no target object");
}
return(tr.Type);
}
var pd = expr as CodeParameterDeclarationExpression;
if (null != pd)
{
if (null == pd.Type)
{
throw new InvalidOperationException("The parameter declaration had no target object");
}
return(pd.Type);
}
var oc = expr as CodeObjectCreateExpression;
if (null != oc)
{
if (null == oc.CreateType)
{
throw new InvalidOperationException("The object creation expression had no create type");
}
return(oc.CreateType);
}
var ac = expr as CodeArrayCreateExpression;
if (null != ac)
{
if (null == ac.CreateType)
{
throw new InvalidOperationException("The array creation expression had no create type");
}
var ctr = new CodeTypeReference();
ctr.ArrayElementType = ac.CreateType.ArrayElementType;
ctr.ArrayRank = ac.CreateType.ArrayRank;
ctr.BaseType = ac.CreateType.BaseType;
ctr.TypeArguments.AddRange(ac.CreateType.TypeArguments);
return(ctr);
}
var dc = expr as CodeDelegateCreateExpression;
if (null != dc)
{
if (null == dc.DelegateType)
{
throw new InvalidOperationException("The delegate creation expression had no delegate type");
}
return(dc.DelegateType);
}
var dv = expr as CodeDefaultValueExpression;
if (null != dv)
{
if (null == dv.Type)
{
throw new InvalidOperationException("The default value expression had no type");
}
return(dv.Type);
}
var dire = expr as CodeDirectionExpression;
if (null != dire)
{
if (null == dire.Expression)
{
throw new InvalidOperationException("The direction expression had no target expression");
}
return(GetTypeOfExpression(dire.Expression, scope));
}
var ai = expr as CodeArrayIndexerExpression;
if (null != ai)
{
var aet = GetTypeOfExpression(ai.TargetObject).ArrayElementType;
if (null == aet)
{
throw new InvalidOperationException("The associated array type's array element type was null");
}
return(aet);
}
var cst = expr as CodeCastExpression;
if (null != cst)
{
if (null == cst.TargetType)
{
throw new InvalidOperationException("The cast expression's target type was null");
}
return(cst.TargetType);
}
var to = expr as CodeTypeOfExpression;
if (null != to)
{
return(new CodeTypeReference(typeof(Type)));
}
// now things get complicated
if (null == scope)
{
scope = GetScope(expr);
}
var cmi = expr as CodeMethodInvokeExpression;
if (null != cmi)
{
var types = new CodeTypeReference[cmi.Parameters.Count];
for (var i = 0; i < types.Length; ++i)
{
var p = cmi.Parameters[i];
var de = p as CodeDirectionExpression;
if (null != de)
{
p = de.Expression;
}
types[i] = GetTypeOfExpression(p, scope);
if (null == types[i])
{
throw new InvalidOperationException(string.Format("Could not resolve parameter index {0} of method invoke expression", i));
}
}
var mr = cmi.Method;
var t = GetTypeOfExpression(mr.TargetObject, scope);
var rt = TryResolveType(t, scope);
if (null == rt)
{
throw new InvalidOperationException("Could not resolve the type of the target expression of the method invoke expression");
}
var rtt = rt as Type;
object tm = null;
var binder = new CodeDomBinder(scope);
var grp = binder.GetMethodGroup(rt, mr.MethodName, BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic);
//tm =binder.BindToMethod(BindingFlags.InvokeMethod | BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic, grp,types, null,null,null,out state);
tm = binder.SelectMethod(BindingFlags.InvokeMethod | BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic, grp, types, null);
if (null == tm)
{
throw new InvalidOperationException("Unable to find a suitable method to bind to in method invoke expression");
}
var mi = tm as MethodInfo;
if (null != mi)
{
return(new CodeTypeReference(mi.ReturnType));
}
var cm = tm as CodeMemberMethod;
if (null == cm.ReturnType)
{
return(new CodeTypeReference(typeof(void)));
}
return(cm.ReturnType);
}
var ar = expr as CodeArgumentReferenceExpression;
if (null != ar)
{
var t = scope.ArgumentTypes[ar.ParameterName];
if (null == t)
{
throw new InvalidOperationException("The argument's type was null");
}
return(t);
}
var vr = expr as CodeVariableReferenceExpression;
if (null != vr)
{
var t = scope.VariableTypes[vr.VariableName];
if (null == t)
{
throw new InvalidOperationException("The variable's type was null. This could be due to an unresolved var declaration in Slang");
}
return(t);
}
var br = expr as CodeBaseReferenceExpression;
if (null != br)
{
var dt = scope.DeclaringType;
if (null != dt)
{
if (0 < dt.BaseTypes.Count)
{ // this isn't exactly right. See notes below
var bt = dt.BaseTypes[0];
if (null == bt)
{
throw new InvalidOperationException("The declaring type's base types contained a null entry.");
}
return(bt);
}
else if (dt.IsClass || dt.IsInterface)
{
return(new CodeTypeReference(typeof(object)));
}
else if (dt.IsEnum)
{
return(new CodeTypeReference(typeof(Enum)));
}
else if (dt.IsStruct)
{
return(new CodeTypeReference(typeof(ValueType)));
}
else
{
throw new InvalidOperationException("The declaring type is not a class, interface, enum or struct");
}
}
throw new InvalidOperationException("There is no declarting type in the scope from which to retrieve a base reference");
}
var th = expr as CodeThisReferenceExpression;
if (null != th)
{
var dt = scope.DeclaringType;
if (null != dt)
{
// TODO: We have no way to fully resolve this because we'd need to know
// what expression created this object. If it's a template we can't know
// what the template args are. The best we can return is something like
// Foo<> so we do that. This is hateful but I don't know what else to do
// here
return(new CodeTypeReference(_GetBaseNameOfType(dt, scope)));
}
throw new InvalidOperationException("There was no declaring type in the scope from which to retrieve a this reference");
}
var fr = expr as CodeFieldReferenceExpression;
if (null != fr)
{
var t = GetTypeOfExpression(fr.TargetObject, scope);
var tt = _ResolveType(t, scope);
if (null == tt)
{
throw new InvalidOperationException("The field reference's target expression type could not be resolved");
}
var binder = new CodeDomBinder(scope);
var fl = BindingFlags.Public | BindingFlags.NonPublic;
var isStatic = (fr.TargetObject as CodeTypeReferenceExpression) != null;
if (isStatic)
{
fl |= BindingFlags.Static;
}
else
{
fl |= BindingFlags.Instance;
}
var res = binder.GetField(tt, fr.FieldName, fl);
if (null != res)
{
var mi = res as MemberInfo;
if (null != mi)
{
return(GetTypeForMember(mi));
}
return(GetTypeForMember(res as CodeTypeMember));
}
throw new InvalidOperationException("A matching field could not be found");
}
var pr = expr as CodePropertyReferenceExpression;
if (null != pr)
{
var t = GetTypeOfExpression(pr.TargetObject, scope);
var tt = _ResolveType(t, scope);
if (null == tt)
{
throw new InvalidOperationException("The property reference's target expression type could not be resolved");
}
var binder = new CodeDomBinder(scope);
var fl = BindingFlags.Public | BindingFlags.NonPublic;
var isStatic = (pr.TargetObject as CodeTypeReferenceExpression) != null;
if (isStatic)
{
fl |= BindingFlags.Static;
}
else
{
fl |= BindingFlags.Instance;
}
var res = binder.GetPropertyGroup(tt, pr.PropertyName, fl);
if (0 < res.Length)
{
var mi = res[0] as MemberInfo;
if (null != mi)
{
return(GetTypeForMember(mi));
}
return(GetTypeForMember(res[0] as CodeTypeMember));
}
throw new InvalidOperationException("A matching property could not be found");
}
var er = expr as CodeEventReferenceExpression;
if (null != er)
{
var t = GetTypeOfExpression(er.TargetObject, scope);
var tt = _ResolveType(t, scope);
if (null == tt)
{
throw new InvalidOperationException("The event reference's target expression type could not be resolved");
}
var binder = new CodeDomBinder(scope);
var fl = BindingFlags.Public | BindingFlags.NonPublic;
var isStatic = (er.TargetObject as CodeTypeReferenceExpression) != null;
if (isStatic)
{
fl |= BindingFlags.Static;
}
else
{
fl |= BindingFlags.Instance;
}
var res = binder.GetEvent(tt, er.EventName, fl);
if (null != res)
{
var mi = res as MemberInfo;
if (null != mi)
{
return(GetTypeForMember(mi));
}
else
{
return(GetTypeForMember(res as CodeTypeMember));
}
}
throw new InvalidOperationException("A matching event could not be found");
}
var di = expr as CodeDelegateInvokeExpression;
if (null != di)
{
var ctr = GetTypeOfExpression(di.TargetObject, scope);
var tt = _ResolveType(ctr, scope) as Type;
if (null == tt)
{
throw new InvalidOperationException("The delegate invoke expression's target expression type could not resolved.");
}
var ma = tt.GetMember("Invoke");
if (0 < ma.Length)
{
var mi = ma[0] as MethodInfo;
if (null != mi)
{
return(new CodeTypeReference(mi.ReturnType));
}
}
throw new InvalidOperationException("The target is not a delegate");
}
var ie = expr as CodeIndexerExpression;
if (null != ie)
{
var t = GetTypeOfExpression(ie.TargetObject, scope);
var types = new CodeTypeReference[ie.Indices.Count];
for (var i = 0; i < types.Length; ++i)
{
var p = ie.Indices[i];
var de = p as CodeDirectionExpression;
if (null != de)
{
p = de.Expression;
}
types[i] = GetTypeOfExpression(p, scope);
if (IsNullOrVoidType(types[i]))
{
throw new InvalidOperationException("One or more of the indexer argument types was void");
}
}
var tt = TryResolveType(t, scope);
if (null == tt)
{
throw new InvalidOperationException("The indexer expression's target expression type could not be resolved");
}
var binder = new CodeDomBinder(scope);
var td = tt as CodeTypeDeclaration;
object tm = null;
if (null != td)
{
var grp = binder.GetPropertyGroup(td, "Item", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.Instance);
tm = binder.SelectProperty(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.Instance, grp, null, types, null);
}
else
{
var rt = tt as Type;
if (null != rt)
{
var grp = binder.GetPropertyGroup(rt, "Item", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.Instance);
tm = binder.SelectProperty(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.Instance, grp, null, types, null);
}
}
if (null == tm)
{
throw new InvalidOperationException("The indexer expression's target object type does not have a matching indexer property");
}
var pi = tm as PropertyInfo;
if (null != pi)
{
return(new CodeTypeReference(pi.PropertyType));
}
var cm = tm as CodeMemberProperty;
if (null == cm.Type)
{
throw new InvalidOperationException("The property declaration's property type was null");
}
return(cm.Type);
}
throw new InvalidOperationException(string.Format("Unsupported expression type {0}", expr.GetType().Name));
}
object _EvalBinOp(CodeBinaryOperatorExpression bo, CodeDomResolverScope s)
{
if (null == s)
{
s = GetScope(bo);
}
switch (bo.Operator)
{
case CodeBinaryOperatorType.Add:
return(_Add(_Eval(bo.Left, s), _Eval(bo.Right, s)));
case CodeBinaryOperatorType.Subtract:
return(_Subtract(_Eval(bo.Left, s), _Eval(bo.Right, s)));
case CodeBinaryOperatorType.Multiply:
return(_Multiply(_Eval(bo.Left, s), _Eval(bo.Right, s)));
case CodeBinaryOperatorType.Divide:
return(_Divide(_Eval(bo.Left, s), _Eval(bo.Right, s)));
case CodeBinaryOperatorType.Modulus:
return(_Modulo(_Eval(bo.Left, s), _Eval(bo.Right, s)));
case CodeBinaryOperatorType.Assign:
throw new NotSupportedException("Evaluate cannot change state.");
case CodeBinaryOperatorType.BitwiseAnd:
return(_BitwiseAnd(_Eval(bo.Left, s), _Eval(bo.Right, s)));
case CodeBinaryOperatorType.BitwiseOr:
return(_BitwiseOr(_Eval(bo.Left, s), _Eval(bo.Right, s)));
case CodeBinaryOperatorType.BooleanAnd:
return(((bool)_Eval(bo.Left, s)) && ((bool)_Eval(bo.Right, s)));
case CodeBinaryOperatorType.BooleanOr:
return(((bool)_Eval(bo.Left, s)) || ((bool)_Eval(bo.Right, s)));
case CodeBinaryOperatorType.LessThan:
return(_LessThan(_Eval(bo.Left, s), _Eval(bo.Right, s)));
case CodeBinaryOperatorType.LessThanOrEqual:
return(_LessThanOrEqual(_Eval(bo.Left, s), _Eval(bo.Right, s)));
case CodeBinaryOperatorType.GreaterThan:
return(_GreaterThan(_Eval(bo.Left, s), _Eval(bo.Right, s)));
case CodeBinaryOperatorType.GreaterThanOrEqual:
return(_GreaterThanOrEqual(_Eval(bo.Left, s), _Eval(bo.Right, s)));
case CodeBinaryOperatorType.IdentityEquality:
case CodeBinaryOperatorType.ValueEquality:
return(_Equals(_Eval(bo.Left, s), _Eval(bo.Right, s)));
case CodeBinaryOperatorType.IdentityInequality:
return(_NotEqual(_Eval(bo.Left, s), _Eval(bo.Right, s)));
default:
throw new NotSupportedException("The specified operation is not supported.");
}
}
object _Eval(CodeExpression e, CodeDomResolverScope s)
{
var ac = e as CodeArrayCreateExpression;
if (null != ac)
{
if (null == s)
{
s = GetScope(ac);
}
var type = _EvalType(ac.CreateType, s);
var len = ac.Initializers.Count;
if (0 == len)
{
if (0 < ac.Size)
{
len = ac.Size;
}
else
{
len = (int)_Eval(ac.SizeExpression, s);
}
}
var arr = Array.CreateInstance(type, len);
if (0 < ac.Initializers.Count)
{
for (int ic = ac.Initializers.Count, i = 0; i < ic; ++i)
{
arr.SetValue(_Eval(ac.Initializers[i], s), i);
}
}
}
var ai = e as CodeArrayIndexerExpression;
if (null != ai)
{
if (null == s)
{
s = GetScope(e);
}
var arr = (Array)_Eval(ai.TargetObject, s);
var ind = new int[ai.Indices.Count];
for (var i = 0; i < ind.Length; i++)
{
ind[i] = (int)_Eval(ai.Indices[i], s);
}
return(arr.GetValue(ind));
}
var bo = e as CodeBinaryOperatorExpression;
if (null != bo)
{
return(_EvalBinOp(bo, s));
}
var c = e as CodeCastExpression;
if (null != c)
{
if (null == s)
{
s = GetScope(c);
}
var type = _EvalType(c.TargetType, s);
var rhs = _Eval(c.Expression, s);
if (null == rhs) // cast from null allowed
{
if (type.IsValueType)
{
throw new InvalidCastException("Cannot cast null to a value type");
}
return(null);
}
if (rhs.GetType().IsAssignableFrom(type))
{
return(rhs);
}
throw new InvalidCastException("The value is not assignable to that target type");
}
var dv = e as CodeDefaultValueExpression;
if (null != dv)
{
if (null == s)
{
s = GetScope(c);
}
var type = _EvalType(c.TargetType, s);
return(Activator.CreateInstance(type));
}
var dc = e as CodeDelegateCreateExpression;
if (null != dc)
{
if (null == s)
{
s = GetScope(dc);
}
var type = _EvalType(dc.DelegateType, s);
var targ = _Eval(dc.TargetObject, s);
var m = targ.GetType().GetMethod(dc.MethodName, ((BindingFlags)(-1)) & ~BindingFlags.DeclaredOnly);
return(Delegate.CreateDelegate(type, targ, m));
}
var di = e as CodeDelegateInvokeExpression;
if (null != di)
{
if (null == s)
{
s = GetScope(di);
}
var lhs = _Eval(di.TargetObject, s);
var parms = new object[di.Parameters.Count];
for (var i = 0; i < parms.Length; i++)
{
parms[i] = _Eval(di.Parameters[i], s);
}
var m = lhs.GetType().GetMethod("Invoke");
try
{
return(m.Invoke(lhs, parms));
}
catch (TargetInvocationException tex)
{
throw tex.InnerException;
}
}
var de = e as CodeDirectionExpression;
if (null != de)
{
if (null == s)
{
s = GetScope(de);
}
return(_Eval(de.Expression, s));
}
var er = e as CodeEventReferenceExpression;
if (null != er)
{
if (null == s)
{
s = GetScope(er);
}
var ev = _Eval(er.TargetObject, s);
var ei = ev.GetType().GetEvent(er.EventName);
// i have no idea what else to return. A delegate?
return(new KeyValuePair <EventInfo, object>(ei, ev));
}
var fr = e as CodeFieldReferenceExpression;
if (null != fr)
{
if (null == s)
{
s = GetScope(fr);
}
var trr = _Eval(fr.TargetObject, s);
var type = trr as Type;
if (null != type)
{
return(type.GetField(fr.FieldName).GetValue(null));
}
return(trr.GetType().GetField(fr.FieldName).GetValue(trr));
}
var ix = e as CodeIndexerExpression;
if (null != ix)
{
if (null == s)
{
s = GetScope(ix);
}
var ir = _Eval(ix.TargetObject, s);
var pia = _GetParamInfos(ix.Indices, s);
var tt = ir as Type;
var type = null != tt ? tt : ir.GetType();
try
{
if (null == tt)
{
return(type.InvokeMember("Item", BindingFlags.Public | BindingFlags.GetProperty | BindingFlags.InvokeMethod | BindingFlags.Instance, null, ir, _GetParamValues(pia)));
}
return(type.InvokeMember("Item", BindingFlags.Public | BindingFlags.GetProperty | BindingFlags.Static | BindingFlags.FlattenHierarchy, null, null, _GetParamValues(pia)));
}
catch (TargetInvocationException tex)
{
throw tex.InnerException;
}
}
var mi = e as CodeMethodInvokeExpression;
if (null != mi)
{
if (null == s)
{
s = GetScope(mi);
}
var mv = _Eval(mi.Method.TargetObject, s);
var type = mv.GetType();
var tt = mv as Type;
if (null != tt)
{
type = tt;
}
var pia = _GetParamInfos(mi.Parameters, s);
try
{
if (null == tt)
{
return(type.InvokeMember(mi.Method.MethodName, BindingFlags.Public | BindingFlags.InvokeMethod | BindingFlags.Instance, null, mv, _GetParamValues(pia)));
}
return(type.InvokeMember(mi.Method.MethodName, BindingFlags.Public | BindingFlags.InvokeMethod | BindingFlags.Static | BindingFlags.FlattenHierarchy, null, null, _GetParamValues(pia)));
}
catch (TargetInvocationException tex)
{
throw tex.InnerException;
}
}
var mr = e as CodeMethodReferenceExpression;
if (null != mr)
{
if (null == s)
{
s = GetScope(mr);
}
var mv = _Eval(mr.TargetObject, s);
var ml = new List <MethodInfo>();
var ma = mv.GetType().GetMethods();
for (var i = 0; i < ma.Length; ++i)
{
var m = ma[i];
if (0 == string.Compare(m.Name, mr.MethodName, StringComparison.InvariantCulture))
{
ml.Add(m);
}
}
return(new KeyValuePair <MethodInfo[], object>(ml.ToArray(), mv)); // basically returning a "MethodGroup" with an attached target object. stupid but what can we do?
}
var oc = e as CodeObjectCreateExpression;
if (null != oc)
{
if (null == s)
{
s = GetScope(oc);
}
var t = _EvalType(oc.CreateType, s);
var pia = _GetParamInfos(oc.Parameters, s);
return(Activator.CreateInstance(t, _GetParamValues(pia)));
}
var p = e as CodePrimitiveExpression;
if (null != p)
{
return(p.Value);
}
var pr = e as CodePropertyReferenceExpression;
if (null != pr)
{
if (null == s)
{
s = GetScope(pr);
}
var trr = _Eval(pr.TargetObject, s);
var type = trr as Type;
if (null != type)
{
return(type.GetProperty(pr.PropertyName).GetValue(null));
}
return(trr.GetType().GetProperty(pr.PropertyName).GetValue(trr));
}
var to = e as CodeTypeOfExpression;
if (null != to)
{
if (null == s)
{
s = GetScope(to);
}
return(_EvalType(to.Type, s));
}
var tr = e as CodeTypeReferenceExpression;
if (null != tr)
{
return(_EvalType(tr.Type, s));
}
throw new NotSupportedException(string.Format("Unable to evaluate expressions of type {0}", e.GetType().FullName));
}
/// <summary> /// Evaluates the expression at the the given scope /// </summary> /// <param name="expression">The expression to evaluate</param> /// <param name="scope">The scope at which evaluation occurs or null to use the expression's scope</param> /// <returns>The result of the evaluation</returns> public object Evaluate(CodeExpression expression, CodeDomResolverScope scope = null) => _Eval(expression, scope);