} // 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 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 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(Properties.Resources.rsNilNotCallable, typeof(object)),
target.Restrictions.Merge(BindingRestrictions.GetInstanceRestriction(target.Expression, null))
));
}
else
{
MethodInfo method =
LuaEmit.FindMethod(
LuaType.GetType(target.LimitType).GetInstanceMethods(BindingFlags.Public, Name),
args,
mo => mo.LimitType,
true);
if (method == null)
{
if (errorSuggestion != null)
{
return(errorSuggestion);
}
return(new DynamicMetaObject(ThrowExpression(String.Format(Properties.Resources.rsMemberNotResolved, target.LimitType.Name, Name), typeof(object)), GetMethodSignatureRestriction(target, args)));
}
try
{
Expression expr;
if (method.IsStatic)
{
expr = LuaEmit.BindParameter(lua,
a => Expression.Call(null, method, a),
method.GetParameters(),
(new DynamicMetaObject[] { target }).Concat(args).ToArray(),
mo => mo.Expression, mo => mo.LimitType, false);
}
else
{
expr = LuaEmit.BindParameter(lua,
a => Expression.Call(EnsureType(target.Expression, target.LimitType), method, a),
method.GetParameters(),
args,
mo => mo.Expression, mo => mo.LimitType, false);
}
return
(new DynamicMetaObject(
EnsureType(expr, typeof(object), true),
GetMethodSignatureRestriction(target, args)
));
}
catch (LuaEmitException e)
{
if (errorSuggestion != null)
{
return(errorSuggestion);
}
return(new DynamicMetaObject(ThrowExpression(e.Message, typeof(object)), GetMethodSignatureRestriction(target, args)));
}
}
} // func FallbackInvokeMember
} // 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
