} // func random
/// <summary>Implementation of http://www.lua.org/manual/5.3/manual.html#pdf-math.randomseed </summary>
/// <param name="x"></param>
public static void randomseed(object x)
{
int seed;
if (x == null)
{
seed = Environment.TickCount;
}
else
{
var tc = LuaEmit.GetTypeCode(x.GetType());
if (tc >= LuaEmitTypeCode.Byte && tc <= LuaEmitTypeCode.Decimal)
{
seed = Convert.ToInt32(x);
}
else if (tc == LuaEmitTypeCode.DateTime)
{
seed = unchecked ((int)((DateTime)x).ToFileTime());
}
else
{
seed = x.GetHashCode();
}
}
rand = new Random(seed);
} // proc randomseed
/// <summary>Implementation of http://www.lua.org/manual/5.3/manual.html#pdf-math.type </summary>
/// <param name="x"></param>
/// <returns></returns>
public static string type(object x)
{
if (x == null)
{
return(null);
}
else
{
switch (LuaEmit.GetTypeCode(x.GetType()))
{
case LuaEmitTypeCode.Byte:
case LuaEmitTypeCode.SByte:
case LuaEmitTypeCode.Int16:
case LuaEmitTypeCode.UInt16:
case LuaEmitTypeCode.Int32:
case LuaEmitTypeCode.UInt32:
case LuaEmitTypeCode.Int64:
case LuaEmitTypeCode.UInt64:
return("integer");
case LuaEmitTypeCode.Double:
case LuaEmitTypeCode.Single:
case LuaEmitTypeCode.Decimal:
return("float");
default:
return(null);
}
}
} // func type
} // func MemberGetSandbox
private static Expression MemberGetExpressionCore(Lua lua, Token tokenStart, Expression instance, string memberName)
{
// if this is a dynamic type, let the type deside what is to do
if (LuaEmit.IsDynamicType(instance.Type))
{
return(DynamicExpression.Dynamic(lua.GetGetMemberBinder(memberName), typeof(object), ConvertObjectExpression(lua, tokenStart, instance, true)));
}
else
{
Expression result;
switch (LuaEmit.TryGetMember(instance, instance.Type, memberName, false, out result))
{
case LuaTryGetMemberReturn.None:
throw ParseError(tokenStart, LuaEmitException.GetMessageText(LuaEmitException.MemberNotFound, instance.Type.Name, memberName));
case LuaTryGetMemberReturn.NotReadable:
throw ParseError(tokenStart, LuaEmitException.GetMessageText(LuaEmitException.CanNotReadMember, instance.Type.Name, memberName));
case LuaTryGetMemberReturn.ValidExpression:
return(result);
default:
throw new ArgumentException("Internal return type of TryGetMember");
}
}
} // func MemberGetExpressionCore
private static Expression MemberSetExpressionCore(Lua lua, Token tokenStart, Expression instance, string memberName, Expression set)
{
if (LuaEmit.IsDynamicType(instance.Type)) // first call the dynamic interface
{
return(DynamicExpression.Dynamic(lua.GetSetMemberBinder(memberName), typeof(object),
ConvertObjectExpression(lua, tokenStart, instance, true),
ConvertObjectExpression(lua, tokenStart, set, true)
));
}
else
{
Expression result;
switch (LuaEmit.TrySetMember(instance, instance.Type, memberName, false, (setType) => ConvertExpression(lua, tokenStart, set, setType), out result))
{
case LuaTrySetMemberReturn.None:
throw ParseError(tokenStart, LuaEmitException.GetMessageText(LuaEmitException.MemberNotFound, instance.Type.Name, memberName));
case LuaTrySetMemberReturn.NotWritable:
throw ParseError(tokenStart, LuaEmitException.GetMessageText(LuaEmitException.CanNotWriteMember, instance.Type.Name, memberName));
case LuaTrySetMemberReturn.ValidExpression:
return(result);
default:
throw new ArgumentException("Internal return type of TrySetMember");
}
}
} // func MemberSetExpressionCore
} // ctor
public override DynamicMetaObject FallbackBinaryOperation(DynamicMetaObject target, DynamicMetaObject arg, DynamicMetaObject errorSuggestion)
{
// defer target and all arguments
if (!target.HasValue || !arg.HasValue)
{
return(Defer(target, arg));
}
Expression expr;
try
{
expr = EnsureType(LuaEmit.BinaryOperationExpression(lua,
lInteger && Operation == ExpressionType.Divide ? Lua.IntegerDivide : Operation,
target.Expression, target.LimitType,
arg.Expression, arg.LimitType, false), this.ReturnType);
}
catch (LuaEmitException e)
{
if (errorSuggestion != null)
{
return(errorSuggestion);
}
expr = ThrowExpression(e.Message, this.ReturnType);
}
// restrictions
var restrictions = target.Restrictions
.Merge(arg.Restrictions)
.Merge(Lua.GetSimpleRestriction(target))
.Merge(Lua.GetSimpleRestriction(arg));
return(new DynamicMetaObject(expr, restrictions));
} // func FallbackBinaryOperation
} // func InvokeMemberExpressionDynamic
private static Expression EnsureInvokeResult(Scope scope, Token tStart, Expression expr, InvokeResult result, Expression instance, string memberName)
{
switch (result)
{
case InvokeResult.LuaResult:
if (expr.Type == typeof(object))
{
return(ConvertExpression(scope.Runtime, tStart, expr, typeof(LuaResult)));
}
else
{
return(MemberGetSandbox(scope, expr, instance, memberName));
}
case InvokeResult.Object:
if (LuaEmit.IsDynamicType(expr.Type))
{
return(MemberGetSandbox(scope, DynamicExpression.Dynamic(scope.Runtime.GetConvertBinder(typeof(object)), typeof(object), ConvertExpression(scope.Runtime, tStart, expr, typeof(object))), instance, memberName));
}
else
{
return(MemberGetSandbox(scope, expr, instance, memberName));
}
default:
return(MemberGetSandbox(scope, expr, instance, memberName));
}
} // func EnsureInvokeResult
} // func InvokeExpression
private static Expression InvokeMemberExpression(Scope scope, Token tStart, Expression instance, string sMember, InvokeResult result, ArgumentsList arguments)
{
if (LuaEmit.IsDynamicType(instance.Type))
{
return(EnsureInvokeResult(scope, tStart,
DynamicExpression.Dynamic(scope.Runtime.GetInvokeMemberBinder(sMember, arguments.CallInfo), typeof(object),
new Expression[] { ConvertExpression(scope.Runtime, tStart, instance, typeof(object)) }.Concat(
from c in arguments.Expressions select Lua.EnsureType(c, typeof(object))
).ToArray()
),
result, instance, sMember
));
}
else
{
// look up the method
MethodInfo method = LuaEmit.FindMethod(
LuaType.GetType(instance.Type).GetInstanceMethods(sMember, false),
arguments.CallInfo,
arguments.Expressions,
getExpressionTypeFunction,
true);
if (method != null)
{
return(EnsureInvokeResult(scope, tStart, SafeExpression(() => InvokeMemberExpressionBind(method, scope.Runtime, instance, arguments), tStart), result, instance, sMember));
}
else
{
return(InvokeMemberExpressionDynamic(scope, tStart, instance, sMember, result, arguments));
}
}
} // func InvokeMemberExpression
} // func IndexSetExpression
private static Expression InvokeExpression(Scope scope, Token tStart, Expression instance, InvokeResult result, ArgumentsList arguments, bool lParse)
{
MethodInfo mi;
ConstantExpression constInstance = instance as ConstantExpression;
LuaType t;
if (constInstance != null && (t = constInstance.Value as LuaType) != null && t.Type != null) // we have a type, bind the ctor
{
var type = t.Type;
var typeInfo = type.GetTypeInfo();
var ci =
typeInfo.IsValueType && arguments.Count == 0 ?
null :
LuaEmit.FindMember(typeInfo.DeclaredConstructors.Where(c => c.IsPublic), arguments.CallInfo, arguments.Expressions, getExpressionTypeFunction, false);
if (ci == null && !typeInfo.IsValueType)
{
throw ParseError(tStart, String.Format(Properties.Resources.rsMemberNotResolved, type.Name, "ctor"));
}
return(SafeExpression(() => LuaEmit.BindParameter(scope.Runtime,
args => ci == null ? Expression.New(type) : Expression.New(ci, args),
ci == null ? new ParameterInfo[0] : ci.GetParameters(),
arguments.CallInfo,
arguments.Expressions,
getExpressionFunction, getExpressionTypeFunction, true), tStart));
}
else if (LuaEmit.IsDynamicType(instance.Type))
{
// fallback is a dynamic call
return(EnsureInvokeResult(scope, tStart,
DynamicExpression.Dynamic(scope.Runtime.GetInvokeBinder(arguments.CallInfo),
typeof(object),
new Expression[] { ConvertExpression(scope.Runtime, tStart, instance, typeof(object)) }.Concat(
from c in arguments.Expressions select Lua.EnsureType(c, typeof(object))
)
),
result, instance, null
));
}
else if (typeof(Delegate).GetTypeInfo().IsAssignableFrom(instance.Type.GetTypeInfo()) && // test if the type is assignable from delegate
(mi = instance.Type.GetRuntimeMethods().Where(c => !c.IsStatic && c.IsPublic && c.Name == "Invoke").FirstOrDefault()) != null) // Search the Invoke method for the arguments
{
return(EnsureInvokeResult(scope, tStart,
SafeExpression(() => LuaEmit.BindParameter <Expression>(
scope.Runtime,
args => Expression.Invoke(instance, args),
mi.GetParameters(),
arguments.CallInfo,
arguments.Expressions,
getExpressionFunction, getExpressionTypeFunction, true), tStart),
result, instance, null
));
}
else
{
throw ParseError(tStart, LuaEmitException.GetMessageText(LuaEmitException.InvokeNoDelegate, instance.Type.Name));
}
} // func InvokeExpression
} // func GetResultExpression
private static Expression UnaryOperationExpression(Lua runtime, Token tStart, ExpressionType op, Expression expr)
{
if (op != ExpressionType.ArrayLength)
{
expr = ConvertObjectExpression(runtime, tStart, expr);
}
return(SafeExpression(() => LuaEmit.UnaryOperationExpression(runtime, op, expr, expr.Type, true), tStart));
} // func UnaryOperationExpression
} // func GetTargetDynamicCall
private DynamicMetaObject GetTargetDynamicCall(CallSiteBinder binder, Type typeReturn, DynamicMetaObject arg)
{
return(GetTargetDynamicCall(binder, typeReturn,
new Expression[]
{
GetFirstResultExpression(),
LuaEmit.Convert(Lua.GetRuntime(binder), arg.Expression, arg.LimitType, typeof(object), false)
}
));
} // func GetTargetDynamicCall
} // proc ReadNumber
private bool IsFileIndex(object v)
{
if (v == null)
{
return(false);
}
LuaEmitTypeCode tc = LuaEmit.GetTypeCode(v.GetType());
return(tc >= LuaEmitTypeCode.SByte && tc <= LuaEmitTypeCode.UInt32);
} // func IsFileIndex
} // func ConvertObjectExpression
private static Expression ConvertExpression(Lua runtime, Token tokenStart, Expression expr, Type toType)
{
// dynamic convert
if (LuaEmit.TryConvert(expr, expr.Type, toType, runtime.GetConvertBinder, out var result))
{
return((Expression)result);
}
else
{
throw ParseError(tokenStart, ((LuaEmitException)result).Message);
}
} // func ConvertExpression
} // ctor
public override DynamicMetaObject FallbackGetMember(DynamicMetaObject target, DynamicMetaObject errorSuggestion)
{
// defer the target, to get the type
if (!target.HasValue)
{
return(Defer(target));
}
if (target.Value == null)
{
return(errorSuggestion ??
new DynamicMetaObject(
ThrowExpression(Properties.Resources.rsNullReference, ReturnType),
target.Restrictions.Merge(BindingRestrictions.GetInstanceRestriction(target.Expression, null))
));
}
else
{
// try to bind the member
Expression expr;
try
{
expr = EnsureType(LuaEmit.GetMember(lua, target.Expression, target.LimitType, Name, IgnoreCase, false), ReturnType);
/*
* Fallback-Calls
* first it get calls with no error suggestion -> return the default value
* second call is to create a bind expression again, with the default value suggest
* Example: DynamicObject - creates something like
*
* fallback(TryGetMember(binder, out result) ? result : fallback(null));
*
*/
if (expr.NodeType == ExpressionType.Default && errorSuggestion != null)
{
return(errorSuggestion);
}
}
catch (LuaEmitException e)
{
if (errorSuggestion != null)
{
return(errorSuggestion);
}
expr = ThrowExpression(e.Message, ReturnType);
}
// restrictions
var restrictions = target.Restrictions.Merge(BindingRestrictions.GetTypeRestriction(target.Expression, target.LimitType));
return(new DynamicMetaObject(expr, restrictions));
}
} // func FallbackGetMember
} // func BinaryOperationExpression
private static Expression ConcatOperationExpression(Lua runtime, Token tStart, Expression[] args)
{
if (Array.Exists(args, c => LuaEmit.IsDynamicType(c.Type))) // we have a dynamic type in the list -> to the concat on runtime
{
return(SafeExpression(() => Expression.Call(Lua.ConcatStringMethodInfo, Expression.NewArrayInit(typeof(object),
from e in args select ConvertObjectExpression(runtime, tStart, e, true))), tStart));
}
else
{
return(SafeExpression(() => Expression.Call(Lua.StringConcatMethodInfo, Expression.NewArrayInit(typeof(string),
from e in args select LuaEmit.Convert(runtime, e, e.Type, typeof(string), true))), tStart));
}
} // func ConcatOperationExpression
} // func SafeExpression
private static Expression ConvertExpressionNoneEmit(Lua runtime, Token tokenStart, Expression expr, Type toType, bool forceType)
{
expr = LuaEmit.ConvertToSingleResultExpression(expr, null, toType, runtime.GetConvertBinder);
if (forceType) // force
{
return(Lua.EnsureType(expr, typeof(object)));
}
else
{
return(expr);
}
} // func ConvertExpressionNoneEmit
} // ctor
public override DynamicMetaObject FallbackConvert(DynamicMetaObject target, DynamicMetaObject errorSuggestion)
{
if (!target.HasValue)
{
return(Defer(target));
}
if (target.Value == null) // get the default value
{
Expression expr;
var restrictions = target.Restrictions.Merge(BindingRestrictions.GetInstanceRestriction(target.Expression, null));
if (Type == typeof(LuaResult)) // replace null with empty LuaResult
{
expr = Expression.Property(null, Lua.ResultEmptyPropertyInfo);
}
else if (Type == typeof(string)) // replace null with empty String
{
expr = Expression.Field(null, Lua.StringEmptyFieldInfo);
}
else
{
expr = Expression.Default(Type);
}
return(new DynamicMetaObject(Lua.EnsureType(expr, ReturnType), restrictions));
}
else // convert the value
{
var restrictions = target.Restrictions.Merge(BindingRestrictions.GetTypeRestriction(target.Expression, target.LimitType));
object result;
if (LuaEmit.TryConvert(target.Expression, target.LimitType, Type, null, out result))
{
return(new DynamicMetaObject(Lua.EnsureType((Expression)result, ReturnType), restrictions));
}
else if (errorSuggestion == null)
{
if (result == null)
{
throw new ArgumentNullException("expr", "LuaEmit.TryConvert does not return a expression.");
}
return(new DynamicMetaObject(ThrowExpression(((LuaEmitException)result).Message, ReturnType), restrictions));
}
else
{
return(errorSuggestion);
}
}
} // func FallbackConvert
} // func InvokeExpression
private static Expression InvokeMemberExpression(Scope scope, Token tStart, Expression instance, string memberName, InvokeResult result, ArgumentsList arguments)
{
if (LuaEmit.IsDynamicType(instance.Type) || arguments.Expressions.Any(c => LuaEmit.IsDynamicType(c.Type)))
{
var dynamicArguments = new Expression[arguments.Count + 1];
// first argument is the instance
dynamicArguments[0] = ConvertObjectExpression(scope.Runtime, tStart, instance, false);
if (arguments.Count > 0)
{
// single object
for (var i = 0; i < arguments.Count - 1; i++)
{
dynamicArguments[i + 1] = ConvertObjectExpression(scope.Runtime, tStart, arguments.Expressions[i], false);
}
// last argument is different
if (arguments.CallInfo.ArgumentNames.Count > 0)
{
dynamicArguments[dynamicArguments.Length - 1] = ConvertObjectExpression(scope.Runtime, tStart, arguments.Expressions[arguments.Count - 1], false);
}
else
{
dynamicArguments[dynamicArguments.Length - 1] = Lua.EnsureType(arguments.Expressions[arguments.Count - 1], typeof(object));
}
}
return(EnsureInvokeResult(scope, tStart,
DynamicExpression.Dynamic(scope.Runtime.GetInvokeMemberBinder(memberName, arguments.CallInfo), typeof(object), dynamicArguments),
result, instance, memberName
));
}
else
{
return(EnsureInvokeResult(scope, tStart,
SafeExpression(() =>
{
Expression expr;
if (!LuaEmit.TryInvokeMember <Expression>(scope.Runtime, LuaType.GetType(instance.Type), instance, arguments.CallInfo, arguments.Expressions, memberName, false, e => e, e => e.Type, true, out expr))
{
throw new LuaEmitException(LuaEmitException.MemberNotFound, instance.Type, memberName);
}
return expr;
}, tStart), result, instance, memberName
));
}
} // func InvokeMemberExpression
} // func IndexGetExpression
private static Expression IndexSetExpression(Lua runtime, Token tStart, Expression instance, Expression[] indexes, Expression set)
{
if (instance.Type == typeof(LuaTable))
{
if (indexes.Length == 1)
{
var arg = indexes[0];
if (LuaTable.IsIndexKey(arg.Type)) // integer access
{
return(Expression.Call(instance, Lua.TableSetValueKeyIntMethodInfo,
ConvertExpression(runtime, tStart, arg, typeof(int)),
ConvertObjectExpression(runtime, tStart, set, true),
Expression.Constant(false)
));
}
else if (arg.Type == typeof(string)) // member access
{
return(Expression.Call(instance, Lua.TableSetValueKeyStringMethodInfo,
arg,
ConvertObjectExpression(runtime, tStart, set, true),
Expression.Constant(false),
Expression.Constant(false)
));
}
else // key access
{
return(Expression.Call(instance, Lua.TableSetValueKeyObjectMethodInfo,
ConvertObjectExpression(runtime, tStart, arg, true),
ConvertObjectExpression(runtime, tStart, set, true),
Expression.Constant(false)
));
}
}
else
{
return(Expression.Call(instance, Lua.TableSetValueKeyListMethodInfo,
Expression.NewArrayInit(typeof(object), from i in indexes select ConvertObjectExpression(runtime, tStart, i, true)),
ConvertObjectExpression(runtime, tStart, set, true),
Expression.Constant(false)
));
}
}
else
{
return(SafeExpression(() => LuaEmit.SetIndex(runtime, instance, indexes, set, getExpressionFunction, getExpressionTypeFunction, true), tStart));
}
} // func IndexSetExpression
} // func MemberGetExpression
private static Expression MemberSetExpression(Lua runtime, Token tStart, Expression instance, string sMember, bool lMethodMember, Expression set)
{
// Assign the value to a member
if (lMethodMember)
{
return(Expression.Call(
ConvertExpression(runtime, tStart, instance, typeof(LuaTable)),
Lua.TableDefineMethodLightMethodInfo,
Expression.Constant(sMember, typeof(string)),
ConvertExpression(runtime, tStart, set, typeof(Delegate))
));
}
else
{
return(SafeExpression(() => LuaEmit.SetMember(runtime, instance, instance.Type, sMember, false, set, set.Type, true), tStart));
}
} // func MemberSetExpression
} // ctor
public override DynamicMetaObject FallbackConvert(DynamicMetaObject target, DynamicMetaObject errorSuggestion)
{
if (!target.HasValue)
{
return(Defer(target));
}
Expression expr = target.Expression;
BindingRestrictions restrictions = null;
if (target.Value == null) // get the default value
{
restrictions = target.Restrictions.Merge(BindingRestrictions.GetInstanceRestriction(target.Expression, null));
if (this.Type == typeof(LuaResult)) // replace null with empty LuaResult
{
expr = Expression.Property(null, Lua.ResultEmptyPropertyInfo);
}
else if (this.Type == typeof(string)) // replace null with empty String
{
expr = Expression.Field(null, Lua.StringEmptyFieldInfo);
}
else
{
expr = Expression.Default(this.Type);
}
}
else // convert the value
{
restrictions = target.Restrictions.Merge(BindingRestrictions.GetTypeRestriction(target.Expression, target.LimitType));
try
{
expr = LuaEmit.Convert(lua, target.Expression, target.LimitType, this.Type, false); // no dynamic allowed
}
catch (LuaEmitException e)
{
if (errorSuggestion != null)
{
return(errorSuggestion);
}
expr = ThrowExpression(e.Message, this.Type);
}
}
return(new DynamicMetaObject(expr, restrictions));
} // func FallbackConvert
/// <summary>
/// Determines whether the specified value is positive.
/// </summary>
/// <param name="Value">The value.</param>
/// <param name="ZeroIsPositive">if set to <c>true</c> treats 0 as positive.</param>
/// <returns>
/// <c>true</c> if the specified value is positive; otherwise, <c>false</c>.
/// </returns>
public static bool IsPositive(object Value, bool ZeroIsPositive)
{
switch (LuaEmit.GetTypeCode(Value.GetType()))
{
case LuaEmitTypeCode.SByte:
return(ZeroIsPositive ? (sbyte)Value >= 0 : (sbyte)Value > 0);
case LuaEmitTypeCode.Int16:
return(ZeroIsPositive ? (short)Value >= 0 : (short)Value > 0);
case LuaEmitTypeCode.Int32:
return(ZeroIsPositive ? (int)Value >= 0 : (int)Value > 0);
case LuaEmitTypeCode.Int64:
return(ZeroIsPositive ? (long)Value >= 0 : (long)Value > 0);
case LuaEmitTypeCode.Single:
return(ZeroIsPositive ? (float)Value >= 0 : (float)Value > 0);
case LuaEmitTypeCode.Double:
return(ZeroIsPositive ? (double)Value >= 0 : (double)Value > 0);
case LuaEmitTypeCode.Decimal:
return(ZeroIsPositive ? (decimal)Value >= 0 : (decimal)Value > 0);
case LuaEmitTypeCode.Byte:
return(ZeroIsPositive ? true : (byte)Value > 0);
case LuaEmitTypeCode.UInt16:
return(ZeroIsPositive ? true : (ushort)Value > 0);
case LuaEmitTypeCode.UInt32:
return(ZeroIsPositive ? true : (uint)Value > 0);
case LuaEmitTypeCode.UInt64:
return(ZeroIsPositive ? true : (ulong)Value > 0);
case LuaEmitTypeCode.Char:
return(ZeroIsPositive ? true : (char)Value != '\0');
default:
return(false);
}
}
} // ctor
public override DynamicMetaObject FallbackSetMember(DynamicMetaObject target, DynamicMetaObject value, DynamicMetaObject errorSuggestion)
{
// defer the target
if (!target.HasValue)
{
return(Defer(target));
}
if (target.Value == null)
{
return(errorSuggestion ??
new DynamicMetaObject(
ThrowExpression(String.Format(Resources.rsMemberNotResolved, target.LimitType.Name, Name), ReturnType),
target.Restrictions.Merge(BindingRestrictions.GetInstanceRestriction(target.Expression, null))
));
}
else
{
Expression expr;
// restrictions
var restrictions = target.Restrictions.Merge(BindingRestrictions.GetTypeRestriction(target.Expression, target.LimitType));
// try to bind the member
switch (LuaEmit.TrySetMember(target.Expression, target.LimitType, Name, IgnoreCase,
(setType) => LuaEmit.ConvertWithRuntime(Lua, value.Expression, value.LimitType, setType),
out expr))
{
case LuaTrySetMemberReturn.None:
return(errorSuggestion ?? new DynamicMetaObject(ThrowExpression(LuaEmitException.GetMessageText(LuaEmitException.MemberNotFound, target.LimitType.Name, Name), ReturnType), restrictions));
case LuaTrySetMemberReturn.NotWritable:
return(errorSuggestion ?? new DynamicMetaObject(ThrowExpression(LuaEmitException.GetMessageText(LuaEmitException.CanNotWriteMember, target.LimitType.Name, Name), ReturnType), restrictions));
case LuaTrySetMemberReturn.ValidExpression:
return(new DynamicMetaObject(Lua.EnsureType(expr, ReturnType), restrictions.Merge(Lua.GetSimpleRestriction(value))));
default:
throw new ArgumentException("return of TryGetMember.");
}
}
} // func FallbackSetMember
} // func FallbackInvoke
public override DynamicMetaObject FallbackInvokeMember(DynamicMetaObject target, DynamicMetaObject[] args, DynamicMetaObject errorSuggestion)
{
// defer target and all arguments
if (!target.HasValue || args.Any(c => !c.HasValue))
{
return(Defer(target, args));
}
if (target.Value == null)
{
return(errorSuggestion ??
new DynamicMetaObject(
ThrowExpression(Resources.rsNilNotCallable, ReturnType),
target.Restrictions.Merge(BindingRestrictions.GetInstanceRestriction(target.Expression, null))
));
}
else
{
try
{
var luaType = LuaType.GetType(target.LimitType);
Expression expr;
if (LuaEmit.TryInvokeMember <DynamicMetaObject>(lua, luaType, target, CallInfo, args, Name, IgnoreCase, mo => mo.Expression, mo => mo.LimitType, false, out expr))
{
return(new DynamicMetaObject(Lua.EnsureType(expr, ReturnType), GetMethodSignatureRestriction(target, args)));
}
else
{
return(errorSuggestion ??
new DynamicMetaObject
(ThrowExpression(String.Format(Resources.rsMemberNotResolved, luaType.FullName, Name), ReturnType),
GetMethodSignatureRestriction(target, args)
));
}
}
catch (LuaEmitException e)
{
return(errorSuggestion ??
new DynamicMetaObject(ThrowExpression(e.Message, ReturnType), GetMethodSignatureRestriction(target, args)));
}
}
} // func FallbackInvokeMember
/// <summary>
/// Converts the specified values boxed type to its correpsonding unsigned
/// type.
/// </summary>
/// <param name="Value">The value.</param>
/// <returns>A boxed numeric object whos type is unsigned.</returns>
public static object ToUnsigned(object Value)
{
switch (LuaEmit.GetTypeCode(Value.GetType()))
{
case LuaEmitTypeCode.SByte:
return((byte)((sbyte)Value));
case LuaEmitTypeCode.Int16:
return((ushort)((short)Value));
case LuaEmitTypeCode.Int32:
return((uint)((int)Value));
case LuaEmitTypeCode.Int64:
return((ulong)((long)Value));
case LuaEmitTypeCode.Byte:
return(Value);
case LuaEmitTypeCode.UInt16:
return(Value);
case LuaEmitTypeCode.UInt32:
return(Value);
case LuaEmitTypeCode.UInt64:
return(Value);
case LuaEmitTypeCode.Single:
return((UInt32)((float)Value));
case LuaEmitTypeCode.Double:
return((ulong)((double)Value));
case LuaEmitTypeCode.Decimal:
return((ulong)((decimal)Value));
default:
return(null);
}
}
/// <summary>
/// Converts the specified values boxed type to its correpsonding integer
/// type.
/// </summary>
/// <param name="Value">The value.</param>
/// <param name="Round"></param>
/// <returns>A boxed numeric object whos type is an integer type.</returns>
public static object ToInteger(object Value, bool Round)
{
switch (LuaEmit.GetTypeCode(Value.GetType()))
{
case LuaEmitTypeCode.SByte:
return(Value);
case LuaEmitTypeCode.Int16:
return(Value);
case LuaEmitTypeCode.Int32:
return(Value);
case LuaEmitTypeCode.Int64:
return(Value);
case LuaEmitTypeCode.Byte:
return(Value);
case LuaEmitTypeCode.UInt16:
return(Value);
case LuaEmitTypeCode.UInt32:
return(Value);
case LuaEmitTypeCode.UInt64:
return(Value);
case LuaEmitTypeCode.Single:
return(Round ? (int)Math.Round((float)Value) : (int)((float)Value));
case LuaEmitTypeCode.Double:
return(Round ? (long)Math.Round((double)Value) : (long)((double)Value));
case LuaEmitTypeCode.Decimal:
return(Round ? Math.Round((decimal)Value) : (decimal)Value);
default:
return(null);
}
}
public static long UnboxToLong(object Value, bool Round)
{
switch (LuaEmit.GetTypeCode(Value.GetType()))
{
case LuaEmitTypeCode.SByte:
return((long)((sbyte)Value));
case LuaEmitTypeCode.Int16:
return((long)((short)Value));
case LuaEmitTypeCode.Int32:
return((long)((int)Value));
case LuaEmitTypeCode.Int64:
return((long)Value);
case LuaEmitTypeCode.Byte:
return((long)((byte)Value));
case LuaEmitTypeCode.UInt16:
return((long)((ushort)Value));
case LuaEmitTypeCode.UInt32:
return((long)((uint)Value));
case LuaEmitTypeCode.UInt64:
return((long)((ulong)Value));
case LuaEmitTypeCode.Single:
return(Round ? (long)Math.Round((float)Value) : (long)((float)Value));
case LuaEmitTypeCode.Double:
return(Round ? (long)Math.Round((double)Value) : (long)((double)Value));
case LuaEmitTypeCode.Decimal:
return(Round ? (long)Math.Round((decimal)Value) : (long)((decimal)Value));
default:
return(0);
}
}
private object LuaToNumber(object v, Nullable <int> iBase = null)
{
if (v == null)
{
return(null);
}
else
{
switch (LuaEmit.GetTypeCode(v.GetType()))
{
case LuaEmitTypeCode.String:
if (iBase.HasValue)
{
return(Lua.RtParseNumber(null, (string)v, 0, iBase.Value, lua.FloatType == LuaFloatType.Double, false));
}
else
{
return(Lua.RtParseNumber((string)v, lua.FloatType == LuaFloatType.Double, false));
}
case LuaEmitTypeCode.SByte:
case LuaEmitTypeCode.Byte:
case LuaEmitTypeCode.Int16:
case LuaEmitTypeCode.UInt16:
case LuaEmitTypeCode.Int32:
case LuaEmitTypeCode.UInt32:
case LuaEmitTypeCode.Int64:
case LuaEmitTypeCode.UInt64:
case LuaEmitTypeCode.Single:
case LuaEmitTypeCode.Double:
case LuaEmitTypeCode.Decimal:
return(v);
case LuaEmitTypeCode.Boolean:
return((bool)v ? 1 : 0);
default:
return(null);
}
}
} // func LuaToNumber
} // func InvokeMemberExpression
private static Expression InvokeMemberExpressionBind(MethodInfo method, Lua runtime, Expression instance, Expression[] arguments)
{
if (method.IsStatic)
{
return(LuaEmit.BindParameter(runtime,
args => Expression.Call(null, method, args),
method.GetParameters(),
new Expression[] { instance }.Concat(
from a in arguments select Lua.EnsureType(a, typeof(object))
).ToArray(),
getExpressionFunction, getExpressionTypeFunction, true));
}
else
{
return(LuaEmit.BindParameter(runtime,
args => Expression.Call(instance, method, args),
method.GetParameters(),
arguments,
getExpressionFunction, getExpressionTypeFunction, true));
}
} // func InvokeMemberExpressionBind
} // func RestrictAccess
/// <summary>Most core method, that gets called to sandbox a value.</summary>
/// <param name="expression">Expression, that should be sandboxed.</param>
/// <param name="instance">Optional: Instance, that was called to get the expression.</param>
/// <param name="sMember">Optional: Name of the member that was used to resolve the expression.</param>
/// <returns>Sandboxed expression</returns>
protected internal virtual Expression SandboxCore(Expression expression, Expression instance, string sMember)
{
switch (Sandbox(expression.Type, instance == null ? null : instance.Type, sMember))
{
case LuaSandboxResult.Dynamic:
if (DynamicSandbox == null)
{
return(expression);
}
else
{
return(LuaEmit.Convert(null, Expression.Invoke(Expression.Constant(DynamicSandbox), expression), typeof(object), expression.Type, false));
}
case LuaSandboxResult.Restrict:
return(RestrictAccess());
default:
return(expression);
}
} // func SandboxCore
} // ctor
public override DynamicMetaObject FallbackGetMember(DynamicMetaObject target, DynamicMetaObject errorSuggestion)
{
// defer the target, to get the type
if (!target.HasValue)
{
return(Defer(target));
}
if (target.Value == null) // no value for target, finish binding with an error or the suggestion
{
return(errorSuggestion ??
new DynamicMetaObject(
ThrowExpression(Resources.rsNullReference, ReturnType),
target.Restrictions.Merge(BindingRestrictions.GetInstanceRestriction(target.Expression, null))
));
}
else
{
Expression expr;
// restrictions
var restrictions = target.Restrictions.Merge(BindingRestrictions.GetTypeRestriction(target.Expression, target.LimitType));
// try to bind the member
switch (LuaEmit.TryGetMember(target.Expression, target.LimitType, Name, IgnoreCase, out expr))
{
case LuaTryGetMemberReturn.None:
return(errorSuggestion ?? new DynamicMetaObject(Expression.Default(ReturnType), restrictions));
case LuaTryGetMemberReturn.NotReadable:
return(errorSuggestion ?? new DynamicMetaObject(ThrowExpression(LuaEmitException.GetMessageText(LuaEmitException.CanNotReadMember, target.LimitType.Name, Name), ReturnType), restrictions));
case LuaTryGetMemberReturn.ValidExpression:
return(new DynamicMetaObject(Lua.EnsureType(expr, ReturnType), restrictions));
default:
throw new ArgumentException("return of TryGetMember.");
}
}
} // func FallbackGetMember