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//
// CSharpBinder.cs
//
// Authors:
// Marek Safar <marek.safar@gmail.com>
//
// Copyright (C) 2009 Novell, Inc (http://www.novell.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.Dynamic;
using System.Linq.Expressions;
using Compiler = Mono.CSharp;
using System.Reflection;
namespace Microsoft.CSharp.RuntimeBinder
{
class CSharpBinder
{
static ConstructorInfo binder_exception_ctor;
static bool compiler_initialized;
static object compiler_initializer = new object ();
static object resolver = new object ();
public static DynamicMetaObject Bind (DynamicMetaObject target, Compiler.Expression expr, BindingRestrictions restrictions, DynamicMetaObject errorSuggestion)
{
var report = new Compiler.Report (ErrorPrinter.Instance) { WarningLevel = 0 };
var ctx = new Compiler.CompilerContext (report);
Compiler.RootContext.ToplevelTypes = new Compiler.ModuleContainer (ctx, true);
InitializeCompiler (ctx);
Expression res;
try {
// TODO: ResolveOptions
Compiler.ResolveContext rc = new Compiler.ResolveContext (new RuntimeBinderContext (ctx));
// Static typemanager and internal caches are not thread-safe
lock (resolver) {
expr = expr.Resolve (rc);
}
if (expr == null)
throw new RuntimeBinderInternalCompilerException ("Expression resolved to null");
res = expr.MakeExpression (new Compiler.BuilderContext ());
} catch (RuntimeBinderException e) {
if (errorSuggestion != null)
return errorSuggestion;
if (binder_exception_ctor == null)
binder_exception_ctor = typeof (RuntimeBinderException).GetConstructor (new[] { typeof (string) });
//
// Uses target type to keep expressions composition working
//
res = Expression.Throw (Expression.New (binder_exception_ctor, Expression.Constant (e.Message)), target.LimitType);
} catch (Exception) {
if (errorSuggestion != null)
return errorSuggestion;
throw;
}
return new DynamicMetaObject (res, restrictions);
}
//
// Creates mcs expression from dynamic method object
//
public static Compiler.Expression CreateCompilerExpression (CSharpArgumentInfo info, DynamicMetaObject value, bool typed)
{
if (info.IsNamed)
throw new NotImplementedException ("IsNamed");
if (value.Value == null)
return new Compiler.NullLiteral (value.LimitType, Compiler.Location.Null);
if ((info.Flags & CSharpArgumentInfoFlags.LiteralConstant) != 0) {
if (!typed)
throw new NotImplementedException ("weakly typed constant");
return Compiler.Constant.CreateConstant (value.RuntimeType ?? value.LimitType, value.Value, Compiler.Location.Null);
}
return new Compiler.RuntimeValueExpression (value, typed);
}
static void InitializeCompiler (Compiler.CompilerContext ctx)
{
if (compiler_initialized)
return;
lock (compiler_initializer) {
if (compiler_initialized)
return;
// TODO: This smells like pretty big issue
// AppDomain.CurrentDomain.AssemblyLoad += (sender, e) => { throw new NotImplementedException (); };
// Add all currently loaded assemblies
foreach (System.Reflection.Assembly a in AppDomain.CurrentDomain.GetAssemblies ())
Compiler.GlobalRootNamespace.Instance.AddAssemblyReference (a);
Compiler.TypeManager.InitCoreTypes (ctx);
Compiler.TypeManager.InitOptionalCoreTypes (ctx);
compiler_initialized = true;
}
}
public static DynamicMetaObject Bind (DynamicMetaObject target, DynamicMetaObject errorSuggestion, DynamicMetaObject[] args)
{
return Bind (target, errorSuggestion);
}
public static DynamicMetaObject Bind (DynamicMetaObject target, DynamicMetaObject errorSuggestion)
{
return errorSuggestion ??
new DynamicMetaObject (
Expression.Constant (new object ()),
target.Restrictions.Merge (
BindingRestrictions.GetTypeRestriction (
target.Expression, target.LimitType)));
}
}
}
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