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
} // 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
} // 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
} // ctor
public override DynamicMetaObject FallbackInvoke(DynamicMetaObject target, DynamicMetaObject[] args, DynamicMetaObject errorSuggestion)
{
//defer the target and all arguments
if (!target.HasValue || args.Any(c => !c.HasValue))
{
return(Defer(target, args));
}
if (target.Value == null) // Invoke on null value
{
return(errorSuggestion ??
new DynamicMetaObject(
ThrowExpression(Properties.Resources.rsNilNotCallable),
BindingRestrictions.GetInstanceRestriction(target.Expression, null)
));
}
else
{
BindingRestrictions restrictions = GetMethodSignatureRestriction(target, args);
Expression expr;
Delegate invokeTarget = target.Value as Delegate;
if (invokeTarget == null)
{
if (errorSuggestion != null)
{
return(errorSuggestion);
}
expr = ThrowExpression(LuaEmitException.GetMessageText(LuaEmitException.InvokeNoDelegate, target.LimitType.Name), typeof(object));
}
else
{
ParameterInfo[] methodParameters = invokeTarget.Method.GetParameters();
ParameterInfo[] parameters = null;
MethodInfo mi = target.LimitType.GetMethod("Invoke");
if (mi != null)
{
ParameterInfo[] typeParameters = mi.GetParameters();
if (typeParameters.Length != methodParameters.Length)
{
parameters = new ParameterInfo[typeParameters.Length];
// the hidden parameters are normally at the beginning
if (parameters.Length > 0)
{
Array.Copy(methodParameters, methodParameters.Length - typeParameters.Length, parameters, 0, parameters.Length);
}
}
else
{
parameters = methodParameters;
}
}
else
{
parameters = methodParameters;
}
try
{
expr =
EnsureType(
LuaEmit.BindParameter(lua,
_args => Expression.Invoke(EnsureType(target.Expression, target.LimitType), _args),
parameters,
args,
mo => mo.Expression, mo => mo.LimitType, false),
typeof(object), true);
}
catch (LuaEmitException e)
{
if (errorSuggestion != null)
{
return(errorSuggestion);
}
expr = ThrowExpression(e.Message, ReturnType);
}
}
return(new DynamicMetaObject(expr, restrictions));
}
} // func FallbackInvoke
} // 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(Properties.Resources.rsNullReference, ReturnType),
target.Restrictions.Merge(BindingRestrictions.GetInstanceRestriction(target.Expression, null))
));
}
else
{
// 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 var 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(EnsureType(expr, ReturnType), restrictions));
default:
throw new ArgumentException("return of TryGetMember.");
}
}
} // func FallbackGetMember
} // 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(Properties.Resources.rsMemberNotResolved, target.LimitType.Name, Name), ReturnType),
target.Restrictions.Merge(BindingRestrictions.GetInstanceRestriction(target.Expression, null))
));
}
else
{
// 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 var 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(EnsureType(expr, ReturnType), restrictions.Merge(GetSimpleRestriction(value))));
default:
throw new ArgumentException("return of TryGetMember.");
}
}
} // func FallbackSetMember
