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|
// NRefactoryEvaluator.cs
//
// Authors: Lluis Sanchez Gual <lluis@novell.com>
// Jeffrey Stedfast <jeff@xamarin.com>
//
// Copyright (c) 2008 Novell, Inc (http://www.novell.com)
// Copyright (c) 2012 Xamarin Inc. (http://www.xamarin.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
//
using System;
using System.Collections.Generic;
using System.IO;
using System.Runtime.InteropServices;
using DC = Mono.Debugging.Client;
using ICSharpCode.OldNRefactory;
using ICSharpCode.OldNRefactory.Parser;
using ICSharpCode.OldNRefactory.Visitors;
using ICSharpCode.OldNRefactory.Ast;
using System.Reflection;
using Mono.Debugging.Client;
using Mono.Debugging.Backend;
namespace Mono.Debugging.Evaluation
{
public class NRefactoryEvaluator: ExpressionEvaluator
{
Dictionary<string,ValueReference> userVariables = new Dictionary<string, ValueReference> ();
public override ValueReference Evaluate (EvaluationContext ctx, string exp, object expectedType)
{
return Evaluate (ctx, exp, expectedType, false);
}
ValueReference Evaluate (EvaluationContext ctx, string exp, object expectedType, bool tryTypeOf)
{
exp = exp.TrimStart ();
if (exp.StartsWith ("?"))
exp = exp.Substring (1).Trim ();
if (exp.StartsWith ("var ")) {
exp = exp.Substring (4).Trim (' ','\t');
string var = null;
for (int n=0; n<exp.Length; n++) {
if (!char.IsLetterOrDigit (exp[n]) && exp[n] != '_') {
var = exp.Substring (0, n);
if (!exp.Substring (n).Trim (' ','\t').StartsWith ("="))
var = null;
break;
}
if (n == exp.Length - 1) {
var = exp;
exp = null;
break;
}
}
if (!string.IsNullOrEmpty (var))
userVariables [var] = new UserVariableReference (ctx, var);
if (exp == null)
return null;
}
exp = ReplaceExceptionTag (exp, ctx.Options.CurrentExceptionTag);
StringReader codeStream = new StringReader (exp);
IParser parser = ParserFactory.CreateParser (SupportedLanguage.CSharp, codeStream);
Expression expObj = parser.ParseExpression ();
if (expObj == null)
throw new EvaluatorException ("Could not parse expression '{0}'", exp);
try {
EvaluatorVisitor ev = new EvaluatorVisitor (ctx, exp, expectedType, userVariables, tryTypeOf);
return (ValueReference) expObj.AcceptVisitor (ev, null);
} catch {
if (!tryTypeOf && (expObj is BinaryOperatorExpression) && IsTypeName (exp)) {
// This is a hack to be able to parse expressions such as "List<string>". The NRefactory parser
// can parse a single type name, so a solution is to wrap it around a typeof(). We do it if
// the evaluation fails.
return Evaluate (ctx, "typeof(" + exp + ")", expectedType, true);
} else
throw;
}
}
public override string Resolve (DebuggerSession session, SourceLocation location, string exp)
{
return Resolve (session, location, exp, false);
}
string Resolve (DebuggerSession session, SourceLocation location, string exp, bool tryTypeOf)
{
exp = exp.TrimStart ();
if (exp.StartsWith ("?"))
return "?" + Resolve (session, location, exp.Substring (1).Trim ());
if (exp.StartsWith ("var "))
return "var " + Resolve (session, location, exp.Substring (4).Trim (' ','\t'));
exp = ReplaceExceptionTag (exp, session.Options.EvaluationOptions.CurrentExceptionTag);
StringReader codeStream = new StringReader (exp);
IParser parser = ParserFactory.CreateParser (SupportedLanguage.CSharp, codeStream);
Expression expObj = parser.ParseExpression ();
if (expObj == null)
return exp;
NRefactoryResolverVisitor ev = new NRefactoryResolverVisitor (session, location, exp);
expObj.AcceptVisitor (ev, null);
string r = ev.GetResolvedExpression ();
if (r == exp && !tryTypeOf && (expObj is BinaryOperatorExpression) && IsTypeName (exp)) {
// This is a hack to be able to parse expressions such as "List<string>". The NRefactory parser
// can parse a single type name, so a solution is to wrap it around a typeof(). We do it if
// the evaluation fails.
string res = Resolve (session, location, "typeof(" + exp + ")", true);
return res.Substring (7, res.Length - 8);
}
return r;
}
public override ValidationResult ValidateExpression (EvaluationContext ctx, string exp)
{
exp = exp.TrimStart ();
if (exp.StartsWith ("?"))
exp = exp.Substring (1).Trim ();
if (exp.StartsWith ("var "))
exp = exp.Substring (4).Trim ();
exp = ReplaceExceptionTag (exp, ctx.Options.CurrentExceptionTag);
// Required as a workaround for a bug in the parser (it won't parse simple expressions like numbers)
if (!exp.EndsWith (";"))
exp += ";";
StringReader codeStream = new StringReader (exp);
IParser parser = ParserFactory.CreateParser (SupportedLanguage.CSharp, codeStream);
string errorMsg = null;
parser.Errors.Error = delegate (int line, int col, string msg) {
if (errorMsg == null)
errorMsg = msg;
};
parser.ParseExpression ();
if (errorMsg != null)
return new ValidationResult (false, errorMsg);
else
return new ValidationResult (true, null);
}
string ReplaceExceptionTag (string exp, string tag)
{
// FIXME: Don't replace inside string literals
return exp.Replace (tag, "__EXCEPTION_OBJECT__");
}
bool IsTypeName (string name)
{
int pos = 0;
bool res = ParseTypeName (name + "$", ref pos);
return res && pos >= name.Length;
}
bool ParseTypeName (string name, ref int pos)
{
EatSpaces (name, ref pos);
if (!ParseName (name, ref pos))
return false;
EatSpaces (name, ref pos);
if (!ParseGenericArgs (name, ref pos))
return false;
EatSpaces (name, ref pos);
if (!ParseIndexer (name, ref pos))
return false;
EatSpaces (name, ref pos);
return true;
}
void EatSpaces (string name, ref int pos)
{
while (char.IsWhiteSpace (name[pos]))
pos++;
}
bool ParseName (string name, ref int pos)
{
if (name[0] == 'g' && pos < name.Length - 8 && name.Substring (pos, 8) == "global::")
pos += 8;
do {
int oldp = pos;
while (char.IsLetterOrDigit (name[pos]))
pos++;
if (oldp == pos)
return false;
if (name[pos] != '.')
return true;
pos++;
}
while (true);
}
bool ParseGenericArgs (string name, ref int pos)
{
if (name [pos] != '<')
return true;
pos++;
EatSpaces (name, ref pos);
while (true) {
if (!ParseTypeName (name, ref pos))
return false;
EatSpaces (name, ref pos);
char c = name [pos++];
if (c == '>')
return true;
else if (c == ',')
continue;
else
return false;
}
}
bool ParseIndexer (string name, ref int pos)
{
if (name [pos] != '[')
return true;
do {
pos++;
EatSpaces (name, ref pos);
} while (name [pos] == ',');
return name [pos++] == ']';
}
}
class EvaluatorVisitor: AbstractAstVisitor
{
EvaluationContext ctx;
EvaluationOptions options;
string name;
object expectedType;
bool tryTypeOf;
Dictionary<string,ValueReference> userVariables;
public EvaluatorVisitor (EvaluationContext ctx, string name, object expectedType, Dictionary<string,ValueReference> userVariables, bool tryTypeOf)
{
this.ctx = ctx;
this.name = name;
this.expectedType = expectedType;
this.userVariables = userVariables;
this.options = ctx.Options;
this.tryTypeOf = tryTypeOf;
}
long GetInteger (object val)
{
try {
return Convert.ToInt64 (val);
} catch {
throw CreateParseError ("Expected integer value");
}
}
public override object VisitUnaryOperatorExpression (ICSharpCode.OldNRefactory.Ast.UnaryOperatorExpression unaryOperatorExpression, object data)
{
ValueReference vref = (ValueReference) unaryOperatorExpression.Expression.AcceptVisitor (this, null);
object val = vref.ObjectValue;
switch (unaryOperatorExpression.Op) {
case UnaryOperatorType.BitNot: {
long num = GetInteger (val);
num = ~num;
val = Convert.ChangeType (num, val.GetType ());
break;
}
case UnaryOperatorType.Minus: {
long num = GetInteger (val);
num = -num;
val = Convert.ChangeType (num, val.GetType ());
break;
}
case UnaryOperatorType.Not: {
if (!(val is bool))
throw CreateParseError ("Expected boolean type in Not operator");
val = !(bool) val;
break;
}
case UnaryOperatorType.Decrement: {
long num = GetInteger (val);
val = Convert.ChangeType (num - 1, val.GetType ());
vref.Value = ctx.Adapter.CreateValue (ctx, val);
break;
}
case UnaryOperatorType.Increment: {
long num = GetInteger (val);
val = Convert.ChangeType (num + 1, val.GetType ());
vref.Value = ctx.Adapter.CreateValue (ctx, val);
break;
}
case UnaryOperatorType.PostDecrement: {
long num = GetInteger (val);
object newVal = Convert.ChangeType (num - 1, val.GetType ());
vref.Value = ctx.Adapter.CreateValue (ctx, newVal);
break;
}
case UnaryOperatorType.PostIncrement: {
long num = GetInteger (val);
object newVal = Convert.ChangeType (num + 1, val.GetType ());
vref.Value = ctx.Adapter.CreateValue (ctx, newVal);
break;
}
case UnaryOperatorType.Plus:
break;
default:
throw CreateNotSupportedError ();
}
return LiteralValueReference.CreateObjectLiteral (ctx, name, val);
}
public override object VisitTypeReference (ICSharpCode.OldNRefactory.Ast.TypeReference typeReference, object data)
{
object type = ToTargetType (typeReference);
if (type != null)
return new TypeValueReference (ctx, type);
else
throw CreateParseError ("Unknown type: " + typeReference.Type);
}
public override object VisitTypeReferenceExpression (ICSharpCode.OldNRefactory.Ast.TypeReferenceExpression typeReferenceExpression, object data)
{
if (typeReferenceExpression.TypeReference.IsGlobal || typeReferenceExpression.TypeReference.IsKeyword) {
string name = typeReferenceExpression.TypeReference.Type;
object type = ctx.Options.AllowImplicitTypeLoading ? ctx.Adapter.ForceLoadType (ctx, name) : ctx.Adapter.GetType (ctx, name);
if (type != null)
return new TypeValueReference (ctx, type);
if (!ctx.Options.AllowImplicitTypeLoading) {
string[] namespaces = ctx.Adapter.GetImportedNamespaces (ctx);
if (namespaces.Length > 0) {
// Look in namespaces
foreach (string ns in namespaces) {
if (name == ns || ns.StartsWith (name + "."))
return new NamespaceValueReference (ctx, name);
}
}
} else {
// Assume it is a namespace.
return new NamespaceValueReference (ctx, name);
}
}
throw CreateNotSupportedError ();
}
object ToTargetType (TypeReference type)
{
if (type.IsNull)
throw CreateParseError ("Invalid type reference");
if (type.GenericTypes.Count == 0)
return ctx.Adapter.GetType (ctx, type.Type);
else {
object[] args = new object [type.GenericTypes.Count];
for (int n=0; n<args.Length; n++) {
object t = ToTargetType (type.GenericTypes [n]);
if (t == null)
return null;
args [n] = t;
}
return ctx.Adapter.GetType (ctx, type.Type + "`" + args.Length, args);
}
}
public override object VisitTypeOfExpression (ICSharpCode.OldNRefactory.Ast.TypeOfExpression typeOfExpression, object data)
{
if (tryTypeOf) {
// The parser is trying to evaluate a type name, but since NRefactory has problems parsing generic types,
// it has to do it by wrapping it with a typeof(). In this case, it sets tryTypeOf=true, meaning that
// typeof in this case has to be evaluated in a special way: as a type reference.
return typeOfExpression.TypeReference.AcceptVisitor (this, data);
}
object type = ToTargetType (typeOfExpression.TypeReference);
if (type == null)
throw CreateParseError ("Unknown type: " + typeOfExpression.TypeReference.Type);
object ob = ctx.Adapter.CreateTypeObject (ctx, type);
if (ob != null)
return LiteralValueReference.CreateTargetObjectLiteral (ctx, typeOfExpression.TypeReference.Type, ob);
else
throw CreateNotSupportedError ();
}
public override object VisitThisReferenceExpression (ICSharpCode.OldNRefactory.Ast.ThisReferenceExpression thisReferenceExpression, object data)
{
ValueReference val = ctx.Adapter.GetThisReference (ctx);
if (val != null)
return val;
else
throw CreateParseError ("'this' reference not available in the current evaluation context.");
}
public override object VisitPrimitiveExpression (ICSharpCode.OldNRefactory.Ast.PrimitiveExpression primitiveExpression, object data)
{
if (primitiveExpression.Value != null)
return LiteralValueReference.CreateObjectLiteral (ctx, name, primitiveExpression.Value);
else if (expectedType != null)
return new NullValueReference (ctx, expectedType);
else
return new NullValueReference (ctx, ctx.Adapter.GetType (ctx, "System.Object"));
}
public override object VisitParenthesizedExpression (ICSharpCode.OldNRefactory.Ast.ParenthesizedExpression parenthesizedExpression, object data)
{
return parenthesizedExpression.Expression.AcceptVisitor (this, data);
}
public override object VisitObjectCreateExpression (ICSharpCode.OldNRefactory.Ast.ObjectCreateExpression objectCreateExpression, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitInvocationExpression (ICSharpCode.OldNRefactory.Ast.InvocationExpression invocationExpression, object data)
{
if (!options.AllowMethodEvaluation)
throw CreateNotSupportedError ();
bool invokeBaseMethod = false;
ValueReference target = null;
string methodName;
object[] argtypes = new object[invocationExpression.Arguments.Count];
object[] args = new object[invocationExpression.Arguments.Count];
for (int n=0; n<args.Length; n++) {
Expression exp = invocationExpression.Arguments [n];
ValueReference vref = (ValueReference) exp.AcceptVisitor (this, data);
args [n] = vref.Value;
argtypes [n] = ctx.Adapter.GetValueType (ctx, args [n]);
}
if (invocationExpression.TargetObject is MemberReferenceExpression) {
MemberReferenceExpression field = (MemberReferenceExpression)invocationExpression.TargetObject;
target = (ValueReference) field.TargetObject.AcceptVisitor (this, data);
if (field.TargetObject is BaseReferenceExpression)
invokeBaseMethod = true;
methodName = field.MemberName;
} else if (invocationExpression.TargetObject is IdentifierExpression) {
IdentifierExpression exp = (IdentifierExpression) invocationExpression.TargetObject;
methodName = exp.Identifier;
ValueReference vref = ctx.Adapter.GetThisReference (ctx);
if (vref != null && ctx.Adapter.HasMethod (ctx, vref.Type, methodName, BindingFlags.Instance)) {
// There is an instance method for 'this', although it may not have an exact signature match. Check it now.
if (ctx.Adapter.HasMethod (ctx, vref.Type, methodName, argtypes, BindingFlags.Instance))
target = vref;
else {
// There isn't an instance method with exact signature match.
// If there isn't a static method, then use the instance method,
// which will report the signature match error when invoked
object etype = ctx.Adapter.GetEnclosingType (ctx);
if (!ctx.Adapter.HasMethod (ctx, etype, methodName, argtypes, BindingFlags.Static))
target = vref;
}
}
else {
if (ctx.Adapter.HasMethod (ctx, ctx.Adapter.GetEnclosingType (ctx), methodName, argtypes, BindingFlags.Instance))
throw new EvaluatorException ("Can't invoke an instance method from a static method.");
target = null;
}
}
else
throw CreateNotSupportedError ();
object vtype = target != null ? target.Type : ctx.Adapter.GetEnclosingType (ctx);
object vtarget = (target is TypeValueReference) || target == null ? null : target.Value;
if (invokeBaseMethod)
vtype = ctx.Adapter.GetBaseType (ctx, vtype);
object res = ctx.Adapter.RuntimeInvoke (ctx, vtype, vtarget, methodName, argtypes, args);
if (res != null)
return LiteralValueReference.CreateTargetObjectLiteral (ctx, name, res);
else
return LiteralValueReference.CreateVoidReturnLiteral (ctx, name);
}
public override object VisitInnerClassTypeReference (ICSharpCode.OldNRefactory.Ast.InnerClassTypeReference innerClassTypeReference, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitIndexerExpression (ICSharpCode.OldNRefactory.Ast.IndexerExpression indexerExpression, object data)
{
ValueReference val = (ValueReference) indexerExpression.TargetObject.AcceptVisitor (this, data);
if (val is TypeValueReference)
throw CreateNotSupportedError ();
if (ctx.Adapter.IsArray (ctx, val.Value)) {
int[] indexes = new int [indexerExpression.Indexes.Count];
for (int n=0; n<indexes.Length; n++) {
ValueReference vi = (ValueReference) indexerExpression.Indexes[n].AcceptVisitor (this, data);
indexes [n] = (int) Convert.ChangeType (vi.ObjectValue, typeof(int));
}
return new ArrayValueReference (ctx, val.Value, indexes);
}
object[] args = new object [indexerExpression.Indexes.Count];
for (int n=0; n<args.Length; n++)
args [n] = ((ValueReference) indexerExpression.Indexes[n].AcceptVisitor (this, data)).Value;
ValueReference res = ctx.Adapter.GetIndexerReference (ctx, val.Value, args);
if (res != null)
return res;
throw CreateNotSupportedError ();
}
public override object VisitIdentifierExpression (ICSharpCode.OldNRefactory.Ast.IdentifierExpression identifierExpression, object data)
{
return VisitIdentifier (identifierExpression.Identifier);
}
object VisitIdentifier (string name)
{
// Exception tag
if (name == "__EXCEPTION_OBJECT__")
return ctx.Adapter.GetCurrentException (ctx);
// Look in user defined variables
ValueReference userVar;
if (userVariables.TryGetValue (name, out userVar))
return userVar;
// Look in variables
ValueReference var = ctx.Adapter.GetLocalVariable (ctx, name);
if (var != null)
return var;
// Look in parameters
var = ctx.Adapter.GetParameter (ctx, name);
if (var != null)
return var;
// Look in fields and properties
ValueReference thisobj = ctx.Adapter.GetThisReference (ctx);
object thistype = thisobj != null ? thisobj.Type : ctx.Adapter.GetEnclosingType (ctx);
var = ctx.Adapter.GetMember (ctx, thisobj, thistype, thisobj != null ? thisobj.Value : null, name);
if (var != null)
return var;
// Look in types
object vtype = ctx.Adapter.GetType (ctx, name);
if (vtype != null)
return new TypeValueReference (ctx, vtype);
// Look in nested types
vtype = ctx.Adapter.GetEnclosingType (ctx);
if (vtype != null) {
foreach (object ntype in ctx.Adapter.GetNestedTypes (ctx, vtype)) {
if (TypeValueReference.GetTypeName (ctx.Adapter.GetTypeName (ctx, ntype)) == name)
return new TypeValueReference (ctx, ntype);
}
string[] namespaces = ctx.Adapter.GetImportedNamespaces (ctx);
if (namespaces.Length > 0) {
// Look in namespaces
foreach (string ns in namespaces) {
string nm = ns + "." + name;
vtype = ctx.Options.AllowImplicitTypeLoading ? ctx.Adapter.ForceLoadType (ctx, nm) : ctx.Adapter.GetType (ctx, nm);
if (vtype != null)
return new TypeValueReference (ctx, vtype);
}
foreach (string ns in namespaces) {
if (ns == name || ns.StartsWith (name + "."))
return new NamespaceValueReference (ctx, name);
}
}
}
if (thisobj == null && ctx.Adapter.HasMember (ctx, thistype, name, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)) {
string message = string.Format ("An object reference is required for the non-static field, method, or property '{0}.{1}'",
ctx.Adapter.GetDisplayTypeName (ctx, thistype), name);
throw CreateParseError (message);
}
throw CreateParseError ("Unknown identifier: {0}", name);
}
public override object VisitMemberReferenceExpression (MemberReferenceExpression memberReferenceExpression, object data)
{
ValueReference vref = (ValueReference) memberReferenceExpression.TargetObject.AcceptVisitor (this, data);
ValueReference ch = vref.GetChild (memberReferenceExpression.MemberName, ctx.Options);
if (ch == null)
throw CreateParseError ("Unknown member: {0}", memberReferenceExpression.MemberName);
return ch;
}
public override object VisitConditionalExpression (ICSharpCode.OldNRefactory.Ast.ConditionalExpression conditionalExpression, object data)
{
ValueReference val = (ValueReference) conditionalExpression.Condition.AcceptVisitor (this, data);
if (val is TypeValueReference)
throw CreateNotSupportedError ();
bool cond = (bool) val.ObjectValue;
if (cond)
return conditionalExpression.TrueExpression.AcceptVisitor (this, data);
else
return conditionalExpression.FalseExpression.AcceptVisitor (this, data);
}
public override object VisitClassReferenceExpression (ICSharpCode.OldNRefactory.Ast.ClassReferenceExpression classReferenceExpression, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitCastExpression (ICSharpCode.OldNRefactory.Ast.CastExpression castExpression, object data)
{
ValueReference val = (ValueReference)castExpression.Expression.AcceptVisitor (this, data);
TypeValueReference type = castExpression.CastTo.AcceptVisitor (this, data) as TypeValueReference;
if (type == null)
throw CreateParseError ("Invalid cast type.");
object ob = ctx.Adapter.TryCast (ctx, val.Value, type.Type);
if (ob == null) {
if (castExpression.CastType == CastType.TryCast)
return new NullValueReference (ctx, type.Type);
else
throw CreateParseError ("Invalid cast.");
}
return LiteralValueReference.CreateTargetObjectLiteral (ctx, name, ob);
}
public override object VisitBinaryOperatorExpression (ICSharpCode.OldNRefactory.Ast.BinaryOperatorExpression binaryOperatorExpression, object data)
{
ValueReference left = (ValueReference) binaryOperatorExpression.Left.AcceptVisitor (this, data);
return EvaluateBinaryOperatorExpression (left, binaryOperatorExpression.Right, binaryOperatorExpression.Op, data);
}
static string GetCommonOperationType (object v1, object v2)
{
if (v1 is double || v2 is double)
return "System.Double";
if (v1 is float || v2 is float)
return "System.Double";
return "System.Int64";
}
object EvaluateOperation (BinaryOperatorType op, double v1, double v2)
{
switch (op) {
case BinaryOperatorType.Add: return v1 + v2;
case BinaryOperatorType.DivideInteger:
case BinaryOperatorType.Divide: return v1 / v2;
case BinaryOperatorType.Multiply: return v1 * v2;
case BinaryOperatorType.Subtract: return v1 - v2;
case BinaryOperatorType.GreaterThan: return v1 > v2;
case BinaryOperatorType.GreaterThanOrEqual: return v1 >= v2;
case BinaryOperatorType.LessThan: return v1 < v2;
case BinaryOperatorType.LessThanOrEqual: return v1 <= v2;
case BinaryOperatorType.ReferenceEquality:
case BinaryOperatorType.Equality: return v1 == v2;
case BinaryOperatorType.ReferenceInequality:
case BinaryOperatorType.InEquality: return v1 != v2;
default: throw CreateParseError ("Invalid binary operator.");
}
}
object EvaluateOperation (BinaryOperatorType op, long v1, long v2)
{
switch (op) {
case BinaryOperatorType.Add: return v1 + v2;
case BinaryOperatorType.BitwiseAnd: return v1 & v2;
case BinaryOperatorType.BitwiseOr: return v1 | v2;
case BinaryOperatorType.ExclusiveOr: return v1 ^ v2;
case BinaryOperatorType.DivideInteger:
case BinaryOperatorType.Divide: return v1 / v2;
case BinaryOperatorType.Modulus: return v1 % v2;
case BinaryOperatorType.Multiply: return v1 * v2;
case BinaryOperatorType.Power: return v1 ^ v2;
case BinaryOperatorType.ShiftLeft: return v1 << (int) v2;
case BinaryOperatorType.ShiftRight: return v1 >> (int) v2;
case BinaryOperatorType.Subtract: return v1 - v2;
case BinaryOperatorType.GreaterThan: return v1 > v2;
case BinaryOperatorType.GreaterThanOrEqual: return v1 >= v2;
case BinaryOperatorType.LessThan: return v1 < v2;
case BinaryOperatorType.LessThanOrEqual: return v1 <= v2;
case BinaryOperatorType.ReferenceEquality:
case BinaryOperatorType.Equality: return v1 == v2;
case BinaryOperatorType.ReferenceInequality:
case BinaryOperatorType.InEquality: return v1 != v2;
default: throw CreateParseError ("Invalid binary operator.");
}
}
void ConvertValues<T> (EvaluationContext ctx, object actualV1, object actualV2, object toType, out T v1, out T v2)
{
try {
object c1 = ctx.Adapter.Cast (ctx, actualV1, toType);
v1 = (T) ctx.Adapter.TargetObjectToObject (ctx, c1);
object c2 = ctx.Adapter.Cast (ctx, actualV2, toType);
v2 = (T) ctx.Adapter.TargetObjectToObject (ctx, c2);
} catch {
throw CreateParseError ("Invalid operands in binary operator");
}
}
bool CheckEquality (object v1, object v2)
{
object targetType = ctx.Adapter.GetValueType (ctx, v1);
object[] argTypes = new object[] {
ctx.Adapter.GetType (ctx, "System.Object")
};
object[] args = new object[] {
v2
};
object result = ctx.Adapter.RuntimeInvoke (ctx, targetType, v1, "Equals", argTypes, args);
var literal = LiteralValueReference.CreateTargetObjectLiteral (ctx, "result", result);
return (bool) literal.ObjectValue;
}
object EvaluateBinaryOperatorExpression (ValueReference left, ICSharpCode.OldNRefactory.Ast.Expression rightExp, BinaryOperatorType oper, object data)
{
// Shortcut ops
switch (oper) {
case BinaryOperatorType.LogicalAnd: {
object val = left.ObjectValue;
if (!(val is bool))
throw CreateParseError ("Left operand of logical And must be a boolean");
if (!(bool)val)
return LiteralValueReference.CreateObjectLiteral (ctx, name, false);
ValueReference vr = (ValueReference) rightExp.AcceptVisitor (this, data);
if (vr == null || ctx.Adapter.GetTypeName (ctx, vr.Type) != "System.Boolean")
throw CreateParseError ("Right operand of logical And must be a boolean");
return vr;
}
case BinaryOperatorType.LogicalOr: {
object val = left.ObjectValue;
if (!(val is bool))
throw CreateParseError ("Left operand of logical Or must be a boolean");
if ((bool)val)
return LiteralValueReference.CreateObjectLiteral (ctx, name, true);
ValueReference vr = (ValueReference) rightExp.AcceptVisitor (this, data);
if (vr == null || ctx.Adapter.GetTypeName (ctx, vr.Type) != "System.Boolean")
throw CreateParseError ("Right operand of logical Or must be a boolean");
return vr;
}
}
ValueReference right = (ValueReference) rightExp.AcceptVisitor (this, data);
object targetVal1 = left.Value;
object targetVal2 = right.Value;
object val1 = left.ObjectValue;
object val2 = right.ObjectValue;
if (oper == BinaryOperatorType.Add || oper == BinaryOperatorType.Concat) {
if (val1 is string || val2 is string) {
if (!(val1 is string) && val1 != null)
val1 = ctx.Adapter.CallToString (ctx, targetVal1);
if (!(val2 is string) && val2 != null)
val2 = ctx.Adapter.CallToString (ctx, targetVal2);
return LiteralValueReference.CreateObjectLiteral (ctx, name, (string) val1 + (string) val2);
}
}
if ((oper == BinaryOperatorType.ExclusiveOr) && (val1 is bool) && (val2 is bool))
return LiteralValueReference.CreateObjectLiteral (ctx, name, (bool)val1 ^ (bool)val2);
if ((val1 == null || !ctx.Adapter.IsPrimitive (ctx, targetVal1)) && (val2 == null || !ctx.Adapter.IsPrimitive (ctx, targetVal2))) {
switch (oper) {
case BinaryOperatorType.Equality:
if (val1 == null || val2 == null)
return LiteralValueReference.CreateObjectLiteral (ctx, name, val1 == val2);
return LiteralValueReference.CreateObjectLiteral (ctx, name, CheckEquality (targetVal1, targetVal2));
case BinaryOperatorType.InEquality:
if (val1 == null || val2 == null)
return LiteralValueReference.CreateObjectLiteral (ctx, name, val1 != val2);
return LiteralValueReference.CreateObjectLiteral (ctx, name, !CheckEquality (targetVal1, targetVal2));
case BinaryOperatorType.ReferenceEquality:
return LiteralValueReference.CreateObjectLiteral (ctx, name, val1 == val2);
case BinaryOperatorType.ReferenceInequality:
return LiteralValueReference.CreateObjectLiteral (ctx, name, val1 != val2);
case BinaryOperatorType.Concat:
throw CreateParseError ("Invalid binary operator.");
}
}
if (val1 == null || val2 == null || (val1 is bool) || (val2 is bool))
throw CreateParseError ("Invalid operands in binary operator");
string opTypeName = GetCommonOperationType (val1, val2);
object opType = ctx.Adapter.GetType (ctx, opTypeName);
object res;
if (opTypeName == "System.Double") {
double v1, v2;
ConvertValues<double> (ctx, targetVal1, targetVal2, opType, out v1, out v2);
res = EvaluateOperation (oper, v1, v2);
} else {
long v1, v2;
ConvertValues<long> (ctx, targetVal1, targetVal2, opType, out v1, out v2);
res = EvaluateOperation (oper, v1, v2);
}
if (!(res is bool)) {
if (ctx.Adapter.IsEnum (ctx, targetVal1)) {
object tval = ctx.Adapter.Cast (ctx, ctx.Adapter.CreateValue (ctx, res), ctx.Adapter.GetValueType (ctx, targetVal1));
return LiteralValueReference.CreateTargetObjectLiteral (ctx, name, tval);
}
if (ctx.Adapter.IsEnum (ctx, targetVal2)) {
object tval = ctx.Adapter.Cast (ctx, ctx.Adapter.CreateValue (ctx, res), ctx.Adapter.GetValueType (ctx, targetVal2));
return LiteralValueReference.CreateTargetObjectLiteral (ctx, name, tval);
}
res = Convert.ChangeType (res, GetCommonType (val1, val2));
}
return LiteralValueReference.CreateObjectLiteral (ctx, name, res);
}
Type GetCommonType (object v1, object v2)
{
int s1 = Marshal.SizeOf (v1);
if (IsUnsigned (s1))
s1 += 8;
int s2 = Marshal.SizeOf (v2);
if (IsUnsigned (s2))
s2 += 8;
if (s1 > s2)
return v1.GetType ();
else
return v2.GetType ();
}
bool IsUnsigned (object v)
{
return (v is byte) || (v is ushort) || (v is uint) || (v is ulong);
}
public override object VisitBaseReferenceExpression (ICSharpCode.OldNRefactory.Ast.BaseReferenceExpression baseReferenceExpression, object data)
{
ValueReference thisobj = ctx.Adapter.GetThisReference (ctx);
if (thisobj != null)
return LiteralValueReference.CreateTargetBaseObjectLiteral (ctx, name, thisobj.Value);
else
throw CreateParseError ("'base' reference not available in static methods.");
}
public override object VisitAssignmentExpression (ICSharpCode.OldNRefactory.Ast.AssignmentExpression assignmentExpression, object data)
{
if (!options.AllowMethodEvaluation)
throw CreateNotSupportedError ();
ValueReference left = (ValueReference) assignmentExpression.Left.AcceptVisitor (this, data);
if (assignmentExpression.Op == AssignmentOperatorType.Assign) {
ValueReference right = (ValueReference) assignmentExpression.Right.AcceptVisitor (this, data);
left.Value = right.Value;
} else {
BinaryOperatorType bop = BinaryOperatorType.None;
switch (assignmentExpression.Op) {
case AssignmentOperatorType.Add: bop = BinaryOperatorType.Add; break;
case AssignmentOperatorType.BitwiseAnd: bop = BinaryOperatorType.BitwiseAnd; break;
case AssignmentOperatorType.BitwiseOr: bop = BinaryOperatorType.BitwiseOr; break;
case AssignmentOperatorType.ConcatString: bop = BinaryOperatorType.Concat; break;
case AssignmentOperatorType.Divide: bop = BinaryOperatorType.Divide; break;
case AssignmentOperatorType.DivideInteger: bop = BinaryOperatorType.DivideInteger; break;
case AssignmentOperatorType.ExclusiveOr: bop = BinaryOperatorType.ExclusiveOr; break;
case AssignmentOperatorType.Modulus: bop = BinaryOperatorType.Modulus; break;
case AssignmentOperatorType.Multiply: bop = BinaryOperatorType.Multiply; break;
case AssignmentOperatorType.Power: bop = BinaryOperatorType.Power; break;
case AssignmentOperatorType.ShiftLeft: bop = BinaryOperatorType.ShiftLeft; break;
case AssignmentOperatorType.ShiftRight: bop = BinaryOperatorType.ShiftRight; break;
case AssignmentOperatorType.Subtract: bop = BinaryOperatorType.Subtract; break;
}
ValueReference val = (ValueReference) EvaluateBinaryOperatorExpression (left, assignmentExpression.Right, bop, data);
left.Value = val.Value;
}
return left;
}
public override object VisitArrayCreateExpression (ICSharpCode.OldNRefactory.Ast.ArrayCreateExpression arrayCreateExpression, object data)
{
throw CreateNotSupportedError ();
}
#region Unsupported expressions
public override object VisitPointerReferenceExpression (ICSharpCode.OldNRefactory.Ast.PointerReferenceExpression pointerReferenceExpression, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitSizeOfExpression (ICSharpCode.OldNRefactory.Ast.SizeOfExpression sizeOfExpression, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitTypeOfIsExpression (ICSharpCode.OldNRefactory.Ast.TypeOfIsExpression typeOfIsExpression, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitYieldStatement (ICSharpCode.OldNRefactory.Ast.YieldStatement yieldStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitWithStatement (ICSharpCode.OldNRefactory.Ast.WithStatement withStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitVariableDeclaration (ICSharpCode.OldNRefactory.Ast.VariableDeclaration variableDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitUsing (ICSharpCode.OldNRefactory.Ast.Using @using, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitUsingStatement (ICSharpCode.OldNRefactory.Ast.UsingStatement usingStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitUsingDeclaration (ICSharpCode.OldNRefactory.Ast.UsingDeclaration usingDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitUnsafeStatement (ICSharpCode.OldNRefactory.Ast.UnsafeStatement unsafeStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitUncheckedStatement (ICSharpCode.OldNRefactory.Ast.UncheckedStatement uncheckedStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitTypeDeclaration (ICSharpCode.OldNRefactory.Ast.TypeDeclaration typeDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitTryCatchStatement (ICSharpCode.OldNRefactory.Ast.TryCatchStatement tryCatchStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitThrowStatement (ICSharpCode.OldNRefactory.Ast.ThrowStatement throwStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitTemplateDefinition (ICSharpCode.OldNRefactory.Ast.TemplateDefinition templateDefinition, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitSwitchStatement (ICSharpCode.OldNRefactory.Ast.SwitchStatement switchStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitSwitchSection (ICSharpCode.OldNRefactory.Ast.SwitchSection switchSection, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitStopStatement (ICSharpCode.OldNRefactory.Ast.StopStatement stopStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitStackAllocExpression (ICSharpCode.OldNRefactory.Ast.StackAllocExpression stackAllocExpression, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitReturnStatement (ICSharpCode.OldNRefactory.Ast.ReturnStatement returnStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitResumeStatement (ICSharpCode.OldNRefactory.Ast.ResumeStatement resumeStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitRemoveHandlerStatement (ICSharpCode.OldNRefactory.Ast.RemoveHandlerStatement removeHandlerStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitReDimStatement (ICSharpCode.OldNRefactory.Ast.ReDimStatement reDimStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitRaiseEventStatement (ICSharpCode.OldNRefactory.Ast.RaiseEventStatement raiseEventStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitPropertySetRegion (ICSharpCode.OldNRefactory.Ast.PropertySetRegion propertySetRegion, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitPropertyGetRegion (ICSharpCode.OldNRefactory.Ast.PropertyGetRegion propertyGetRegion, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitPropertyDeclaration (ICSharpCode.OldNRefactory.Ast.PropertyDeclaration propertyDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitParameterDeclarationExpression (ICSharpCode.OldNRefactory.Ast.ParameterDeclarationExpression parameterDeclarationExpression, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitOptionDeclaration (ICSharpCode.OldNRefactory.Ast.OptionDeclaration optionDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitOperatorDeclaration (ICSharpCode.OldNRefactory.Ast.OperatorDeclaration operatorDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitOnErrorStatement (ICSharpCode.OldNRefactory.Ast.OnErrorStatement onErrorStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitNamespaceDeclaration (ICSharpCode.OldNRefactory.Ast.NamespaceDeclaration namespaceDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitNamedArgumentExpression (ICSharpCode.OldNRefactory.Ast.NamedArgumentExpression namedArgumentExpression, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitMethodDeclaration (ICSharpCode.OldNRefactory.Ast.MethodDeclaration methodDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitLockStatement (ICSharpCode.OldNRefactory.Ast.LockStatement lockStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitLocalVariableDeclaration (ICSharpCode.OldNRefactory.Ast.LocalVariableDeclaration localVariableDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitLabelStatement (ICSharpCode.OldNRefactory.Ast.LabelStatement labelStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitInterfaceImplementation (ICSharpCode.OldNRefactory.Ast.InterfaceImplementation interfaceImplementation, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitIndexerDeclaration (ICSharpCode.OldNRefactory.Ast.IndexerDeclaration indexerDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitIfElseStatement (ICSharpCode.OldNRefactory.Ast.IfElseStatement ifElseStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitGotoStatement (ICSharpCode.OldNRefactory.Ast.GotoStatement gotoStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitGotoCaseStatement (ICSharpCode.OldNRefactory.Ast.GotoCaseStatement gotoCaseStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitForStatement (ICSharpCode.OldNRefactory.Ast.ForStatement forStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitForNextStatement (ICSharpCode.OldNRefactory.Ast.ForNextStatement forNextStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitForeachStatement (ICSharpCode.OldNRefactory.Ast.ForeachStatement foreachStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitFixedStatement (ICSharpCode.OldNRefactory.Ast.FixedStatement fixedStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitFieldDeclaration (ICSharpCode.OldNRefactory.Ast.FieldDeclaration fieldDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitExpressionStatement (ICSharpCode.OldNRefactory.Ast.ExpressionStatement expressionStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitExitStatement (ICSharpCode.OldNRefactory.Ast.ExitStatement exitStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitEventRemoveRegion (ICSharpCode.OldNRefactory.Ast.EventRemoveRegion eventRemoveRegion, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitEventRaiseRegion (ICSharpCode.OldNRefactory.Ast.EventRaiseRegion eventRaiseRegion, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitEventDeclaration (ICSharpCode.OldNRefactory.Ast.EventDeclaration eventDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitEventAddRegion (ICSharpCode.OldNRefactory.Ast.EventAddRegion eventAddRegion, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitErrorStatement (ICSharpCode.OldNRefactory.Ast.ErrorStatement errorStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitEraseStatement (ICSharpCode.OldNRefactory.Ast.EraseStatement eraseStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitEndStatement (ICSharpCode.OldNRefactory.Ast.EndStatement endStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitEmptyStatement (ICSharpCode.OldNRefactory.Ast.EmptyStatement emptyStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitElseIfSection (ICSharpCode.OldNRefactory.Ast.ElseIfSection elseIfSection, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitDoLoopStatement (ICSharpCode.OldNRefactory.Ast.DoLoopStatement doLoopStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitDirectionExpression (ICSharpCode.OldNRefactory.Ast.DirectionExpression directionExpression, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitDestructorDeclaration (ICSharpCode.OldNRefactory.Ast.DestructorDeclaration destructorDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitDelegateDeclaration (ICSharpCode.OldNRefactory.Ast.DelegateDeclaration delegateDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitDefaultValueExpression (ICSharpCode.OldNRefactory.Ast.DefaultValueExpression defaultValueExpression, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitDeclareDeclaration (ICSharpCode.OldNRefactory.Ast.DeclareDeclaration declareDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitContinueStatement (ICSharpCode.OldNRefactory.Ast.ContinueStatement continueStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitConstructorInitializer (ICSharpCode.OldNRefactory.Ast.ConstructorInitializer constructorInitializer, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitConstructorDeclaration (ICSharpCode.OldNRefactory.Ast.ConstructorDeclaration constructorDeclaration, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitCompilationUnit (ICSharpCode.OldNRefactory.Ast.CompilationUnit compilationUnit, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitCheckedStatement (ICSharpCode.OldNRefactory.Ast.CheckedStatement checkedStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitCatchClause (ICSharpCode.OldNRefactory.Ast.CatchClause catchClause, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitCaseLabel (ICSharpCode.OldNRefactory.Ast.CaseLabel caseLabel, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitBreakStatement (ICSharpCode.OldNRefactory.Ast.BreakStatement breakStatement, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitAttributeSection (ICSharpCode.OldNRefactory.Ast.AttributeSection attributeSection, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitAttribute (ICSharpCode.OldNRefactory.Ast.Attribute attribute, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitAnonymousMethodExpression (ICSharpCode.OldNRefactory.Ast.AnonymousMethodExpression anonymousMethodExpression, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitAddressOfExpression (ICSharpCode.OldNRefactory.Ast.AddressOfExpression addressOfExpression, object data)
{
throw CreateNotSupportedError ();
}
public override object VisitAddHandlerStatement (ICSharpCode.OldNRefactory.Ast.AddHandlerStatement addHandlerStatement, object data)
{
throw CreateNotSupportedError ();
}
#endregion
Exception CreateParseError (string message, params object[] args)
{
return new EvaluatorException (message, args);
}
Exception CreateNotSupportedError ()
{
return new NotSupportedExpressionException ();
}
}
}
|