object CreateObject(string objTypeName, string expressionText, EvalEnv env)
{
var objType = FindType (objTypeName);
return CreateObject (objType, expressionText, env);
}
object CreateObject(Type objType, string expressionText, EvalEnv env)
{
if (string.IsNullOrEmpty (expressionText)) {
if (objType == typeof (string)) {
return string.Empty;
}
else {
return Activator.CreateInstance (objType);
}
}
else {
var expr = Expression.Parse (expressionText);
return expr.Eval (new ObjectEvalEnv (null, objType, env));
}
}
public override object Eval(EvalEnv env)
{
return env.Lookup (Name);
}
object AssignObject(object obj, Type objType, ObjectLiteralExpression literal, EvalEnv env)
{
throw new NotImplementedException ();
}
public override object Eval(EvalEnv env)
{
if (Constructor == null) throw new InvalidOperationException ("Cannot eval object literal without Constructor");
var obj = Constructor.Eval (env);
var objType = obj.GetType ();
foreach (var a in Assignments) {
var members = objType.GetMember (a.Name, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static);
if (members == null || members.Length == 0) {
throw new Exception ("'" + a.Name + "' not found in '" + objType.FullName + "'");
}
var value = a.Value.Eval (env);
SetValue (obj, members[0], value);
}
return obj;
}
public override object Eval(EvalEnv env)
{
var a = Value.Eval (env);
if (a is double) {
if (Operator == TokenType.Subtract) return -(double)a;
}
else if (a is float) {
if (Operator == TokenType.Subtract) return -(float)a;
}
else if (a is decimal) {
if (Operator == TokenType.Subtract) return -(decimal)a;
}
else if (a is ulong) {
if (Operator == TokenType.Subtract) throw new NotSupportedException ("Cannot negate UInt64");
}
else if (a is long) {
if (Operator == TokenType.Subtract) return -(long)a;
}
else if (a is uint) {
if (Operator == TokenType.Subtract) return -(uint)a;
}
else {
if (Operator == TokenType.Subtract) return -Convert.ToInt32 (a);
}
throw new NotImplementedException (Operator.ToString ());
}
public ObjectEvalEnv(EvalEnv parent = null)
: base(parent)
{
_obj = null;
_objType = typeof (object);
}
public ObjectEvalEnv(object obj, Type objType, EvalEnv parent = null)
: base(parent)
{
_obj = obj;
_objType = objType;
}
public override object Eval(EvalEnv env)
{
var obj = Object.Eval (env);
if (obj == null) {
throw new NullReferenceException ("Object is null when accessing '" + Name + "'");
}
var members = obj.GetType ().GetMember (Name);
if (members == null || members.Length == 0) {
throw new MissingMemberException (obj.GetType ().FullName, Name);
}
var member = members[0];
var prop = member as PropertyInfo;
if (prop != null) {
return prop.GetValue (obj, null);
}
else {
var field = member as FieldInfo;
if (field != null) {
return field.GetValue (obj);
}
else {
throw new NotSupportedException (member.MemberType.ToString ());
}
}
}
public override object Eval(EvalEnv env)
{
Type ty = null;
if (string.IsNullOrEmpty (TypeName)) {
var p = env;
while (p != null) {
if (p is ObjectEvalEnv) {
ty = ((ObjectEvalEnv)p).ObjectType;
break;
}
p = p.Parent;
}
if (ty == null) {
throw new Exception ("No context to create anonymous type");
}
}
else {
ty = Test.FindType (TypeName);
}
var args = Arguments.Select (a => a.Eval (env)).ToArray ();
return Activator.CreateInstance (ty, args);
}
public LocalsEvalEnv(EvalEnv parent = null)
: base(parent)
{
}
public abstract object Eval(EvalEnv env);
public EvalEnv(EvalEnv parent = null)
{
_parent = parent;
}
public override object Eval(EvalEnv env)
{
return Value;
}
public override object Eval(EvalEnv env)
{
var left = Left.Eval (env);
switch (Operator) {
case TokenType.LogicalAnd:
return (bool)left && (bool)Right.Eval (env);
case TokenType.LogicalOr:
return (bool)left || (bool)Right.Eval (env);
case TokenType.Equal:
return left.Equals (Right.Eval (env));
case TokenType.NotEqual:
return !left.Equals (Right.Eval (env));
case TokenType.Add:
return Add (left, Right.Eval (env));
case TokenType.Subtract:
return Subtract (left, Right.Eval (env));
case TokenType.Multiply:
return Multiply (left, Right.Eval (env));
case TokenType.Divide:
return Divide (left, Right.Eval (env));
case TokenType.GreaterThan:
return GreaterThan (left, Right.Eval (env));
case TokenType.LessThan:
return LessThan (left, Right.Eval (env));
case TokenType.GreaterThanOrEqual:
return GreaterThanOrEqual (left, Right.Eval (env));
case TokenType.LessThanOrEqual:
return LessThanOrEqual (left, Right.Eval (env));
default:
throw new NotImplementedException (Operator.ToString ());
}
}
