source: stable/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory.CSharp-5.5.0/Parser/mcs/module.cs @ 18242

//
// module.cs: keeps a tree representation of the generated code
//
// Authors: Miguel de Icaza (miguel@gnu.org)
//          Marek Safar  (marek.safar@gmail.com)
//
// Dual licensed under the terms of the MIT X11 or GNU GPL
//
// Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
// Copyright 2003-2008 Novell, Inc.
// Copyright 2011 Xamarin Inc
//

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using Mono.CompilerServices.SymbolWriter;
using System.Linq;

#if STATIC
using IKVM.Reflection;
using IKVM.Reflection.Emit;
#else
using System.Reflection;
using System.Reflection.Emit;
#endif

namespace Mono.CSharp
{
  //
  // Module (top-level type) container
  //
  public sealed class ModuleContainer : TypeContainer
  {
#if STATIC
    //
    // Compiler generated container for static data
    //
    sealed class StaticDataContainer : CompilerGeneratedContainer
    {
      readonly Dictionary<int, Struct> size_types;
      int fields;

      public StaticDataContainer (ModuleContainer module)
        : base (module, new MemberName ("<PrivateImplementationDetails>" + module.builder.ModuleVersionId.ToString ("B"), Location.Null),
          Modifiers.STATIC | Modifiers.INTERNAL)
      {
        size_types = new Dictionary<int, Struct> ();
      }

      public override void CloseContainer ()
      {
        base.CloseContainer ();

        foreach (var entry in size_types) {
          entry.Value.CloseContainer ();
        }
      }

      public FieldSpec DefineInitializedData (byte[] data, Location loc)
      {
        Struct size_type;
        if (!size_types.TryGetValue (data.Length, out size_type)) {
          //
          // Build common type for this data length. We cannot use
          // DefineInitializedData because it creates public type,
          // and its name is not unique among modules
          //
          size_type = new Struct (this, new MemberName ("$ArrayType=" + data.Length, loc), Modifiers.PRIVATE | Modifiers.COMPILER_GENERATED, null);
          size_type.CreateContainer ();
          size_type.DefineContainer ();

          size_types.Add (data.Length, size_type);

          // It has to work even if StructLayoutAttribute does not exist
          size_type.TypeBuilder.__SetLayout (1, data.Length);
        }

        var name = "$field-" + fields.ToString ("X");
        ++fields;
        const Modifiers fmod = Modifiers.STATIC | Modifiers.INTERNAL;
        var fbuilder = TypeBuilder.DefineField (name, size_type.CurrentType.GetMetaInfo (), ModifiersExtensions.FieldAttr (fmod) | FieldAttributes.HasFieldRVA);
        fbuilder.__SetDataAndRVA (data);

        return new FieldSpec (CurrentType, null, size_type.CurrentType, fbuilder, fmod);
      }
    }

    StaticDataContainer static_data;

    //
    // Makes const data field inside internal type container
    //
    public FieldSpec MakeStaticData (byte[] data, Location loc)
    {
      if (static_data == null) {
        static_data = new StaticDataContainer (this);
        static_data.CreateContainer ();
        static_data.DefineContainer ();

        AddCompilerGeneratedClass (static_data);
      }

      return static_data.DefineInitializedData (data, loc);
    }
#endif

    public sealed class PatternMatchingHelper : CompilerGeneratedContainer
    {
      public PatternMatchingHelper (ModuleContainer module)
        : base (module, new MemberName ("<PatternMatchingHelper>", Location.Null),
          Modifiers.STATIC | Modifiers.INTERNAL | Modifiers.DEBUGGER_HIDDEN)
      {
      }

      public Method NumberMatcher { get; private set; }

      protected override bool DoDefineMembers ()
      {
        if (!base.DoDefineMembers ())
          return false;

        NumberMatcher = GenerateNumberMatcher ();
        return true;
      }

      Method GenerateNumberMatcher ()
      {
        var loc = Location;
        var parameters = ParametersCompiled.CreateFullyResolved (
          new [] {
            new Parameter (new TypeExpression (Compiler.BuiltinTypes.Object, loc), "obj", 0, null, loc),
            new Parameter (new TypeExpression (Compiler.BuiltinTypes.Object, loc), "value", 0, null, loc),
            new Parameter (new TypeExpression (Compiler.BuiltinTypes.Bool, loc), "enumType", 0, null, loc),
          },
          new [] {
            Compiler.BuiltinTypes.Object,
            Compiler.BuiltinTypes.Object,
            Compiler.BuiltinTypes.Bool
          });

        var m = new Method (this, new TypeExpression (Compiler.BuiltinTypes.Bool, loc),
          Modifiers.PUBLIC | Modifiers.STATIC | Modifiers.DEBUGGER_HIDDEN, new MemberName ("NumberMatcher", loc),
          parameters, null);

        parameters [0].Resolve (m, 0);
        parameters [1].Resolve (m, 1);
        parameters [2].Resolve (m, 2);

        ToplevelBlock top_block = new ToplevelBlock (Compiler, parameters, loc);
        m.Block = top_block;

        //
        // if (enumType)
        //    return Equals (obj, value);
        //
        var equals_args = new Arguments (2);
        equals_args.Add (new Argument (top_block.GetParameterReference (0, loc)));
        equals_args.Add (new Argument (top_block.GetParameterReference (1, loc)));

        var if_type = new If (
                        top_block.GetParameterReference (2, loc),
                        new Return (new Invocation (new SimpleName ("Equals", loc), equals_args), loc),
                        loc);

        top_block.AddStatement (if_type);

        //
        // if (obj is Enum || obj == null)
        //    return false;
        //

        var if_enum = new If (
                        new Binary (Binary.Operator.LogicalOr,
                          new Is (top_block.GetParameterReference (0, loc), new TypeExpression (Compiler.BuiltinTypes.Enum, loc), loc),
                          new Binary (Binary.Operator.Equality, top_block.GetParameterReference (0, loc), new NullLiteral (loc))),
                        new Return (new BoolLiteral (Compiler.BuiltinTypes, false, loc), loc),
                        loc);

        top_block.AddStatement (if_enum);


        var system_convert = new MemberAccess (new QualifiedAliasMember ("global", "System", loc), "Convert", loc);

        //
        // var converted = System.Convert.ChangeType (obj, System.Convert.GetTypeCode (value));
        //
        var lv_converted = LocalVariable.CreateCompilerGenerated (Compiler.BuiltinTypes.Object, top_block, loc);

        var arguments_gettypecode = new Arguments (1);
        arguments_gettypecode.Add (new Argument (top_block.GetParameterReference (1, loc)));

        var gettypecode = new Invocation (new MemberAccess (system_convert, "GetTypeCode", loc), arguments_gettypecode);

        var arguments_changetype = new Arguments (1);
        arguments_changetype.Add (new Argument (top_block.GetParameterReference (0, loc)));
        arguments_changetype.Add (new Argument (gettypecode));

        var changetype = new Invocation (new MemberAccess (system_convert, "ChangeType", loc), arguments_changetype);

        top_block.AddStatement (new StatementExpression (new SimpleAssign (new LocalVariableReference (lv_converted, loc), changetype, loc)));


        //
        // return converted.Equals (value)
        //
        var equals_arguments = new Arguments (1);
        equals_arguments.Add (new Argument (top_block.GetParameterReference (1, loc)));
        var equals_invocation = new Invocation (new MemberAccess (new LocalVariableReference (lv_converted, loc), "Equals"), equals_arguments);
        top_block.AddStatement (new Return (equals_invocation, loc));

        m.Define ();
        m.PrepareEmit ();
        AddMember (m);

        return m;
      }
    }

    PatternMatchingHelper pmh;

    public PatternMatchingHelper CreatePatterMatchingHelper ()
    {
      if (pmh == null) {
        pmh = new PatternMatchingHelper (this);

        pmh.CreateContainer ();
        pmh.DefineContainer ();
        pmh.Define ();
        AddCompilerGeneratedClass (pmh);
      }

      return pmh;
    }

    public CharSet? DefaultCharSet;
    public TypeAttributes DefaultCharSetType = TypeAttributes.AnsiClass;

    readonly Dictionary<int, List<AnonymousTypeClass>> anonymous_types;
    readonly Dictionary<ArrayContainer.TypeRankPair, ArrayContainer> array_types;
    readonly Dictionary<TypeSpec, PointerContainer> pointer_types;
    readonly Dictionary<TypeSpec, ReferenceContainer> reference_types;
    readonly Dictionary<TypeSpec, MethodSpec> attrs_cache;
    readonly Dictionary<TypeSpec, AwaiterDefinition> awaiters;

    AssemblyDefinition assembly;
    readonly CompilerContext context;
    readonly RootNamespace global_ns;
    readonly Dictionary<string, RootNamespace> alias_ns;

    ModuleBuilder builder;

    bool has_extenstion_method;

    PredefinedAttributes predefined_attributes;
    PredefinedTypes predefined_types;
    PredefinedMembers predefined_members;

    public Binary.PredefinedOperator[] OperatorsBinaryEqualityLifted;
    public Binary.PredefinedOperator[] OperatorsBinaryLifted;

    static readonly string[] attribute_targets = new string[] { "assembly", "module" };

    public ModuleContainer (CompilerContext context)
      : base (null, MemberName.Null, null, 0)
    {
      this.context = context;

      caching_flags &= ~(Flags.Obsolete_Undetected | Flags.Excluded_Undetected);

      containers = new List<TypeContainer> ();
      anonymous_types = new Dictionary<int, List<AnonymousTypeClass>> ();
      global_ns = new GlobalRootNamespace ();
      alias_ns = new Dictionary<string, RootNamespace> ();
      array_types = new Dictionary<ArrayContainer.TypeRankPair, ArrayContainer> ();
      pointer_types = new Dictionary<TypeSpec, PointerContainer> ();
      reference_types = new Dictionary<TypeSpec, ReferenceContainer> ();
      attrs_cache = new Dictionary<TypeSpec, MethodSpec> ();
      awaiters = new Dictionary<TypeSpec, AwaiterDefinition> ();
    }

    #region Properties

    internal Dictionary<ArrayContainer.TypeRankPair, ArrayContainer> ArrayTypesCache {
      get {
        return array_types;
      }
    }

    //
    // Cache for parameter-less attributes
    //
    internal Dictionary<TypeSpec, MethodSpec> AttributeConstructorCache {
      get {
        return attrs_cache;
      }
    }

    public override AttributeTargets AttributeTargets {
      get {
        return AttributeTargets.Assembly;
      }
    }

    public ModuleBuilder Builder {
      get {
        return builder;
      }
    }

    public override CompilerContext Compiler {
      get {
        return context;
      }
    }

    public int CounterAnonymousTypes { get; set; }

    public AssemblyDefinition DeclaringAssembly {
      get {
        return assembly;
      }
    }

    internal DocumentationBuilder DocumentationBuilder {
      get; set;
    }

    public override string DocCommentHeader {
      get {
        throw new NotSupportedException ();
      }
    }

    public Evaluator Evaluator {
      get; set;
    }

    public bool HasDefaultCharSet {
      get {
        return DefaultCharSet.HasValue;
      }
    }

    public bool HasExtensionMethod {
      get {
        return has_extenstion_method;
      }
      set {
        has_extenstion_method = value;
      }
    }

    public bool HasTypesFullyDefined {
      get; set;
    }

    //
    // Returns module global:: namespace
    //
    public RootNamespace GlobalRootNamespace {
        get {
            return global_ns;
        }
    }

    public override ModuleContainer Module {
      get {
        return this;
      }
    }

    internal Dictionary<TypeSpec, PointerContainer> PointerTypesCache {
      get {
        return pointer_types;
      }
    }

    internal PredefinedAttributes PredefinedAttributes {
      get {
        return predefined_attributes;
      }
    }

    internal PredefinedMembers PredefinedMembers {
      get {
        return predefined_members;
      }
    }

    internal PredefinedTypes PredefinedTypes {
      get {
        return predefined_types;
      }
    }

    internal Dictionary<TypeSpec, ReferenceContainer> ReferenceTypesCache {
      get {
        return reference_types;
      }
    }

    public override string[] ValidAttributeTargets {
      get {
        return attribute_targets;
      }
    }

    #endregion

    public override void Accept (StructuralVisitor visitor)
    {
      visitor.Visit (this);
    }

    public void AddAnonymousType (AnonymousTypeClass type)
    {
      List<AnonymousTypeClass> existing;
      if (!anonymous_types.TryGetValue (type.Parameters.Count, out existing))
      if (existing == null) {
        existing = new List<AnonymousTypeClass> ();
        anonymous_types.Add (type.Parameters.Count, existing);
      }

      existing.Add (type);
    }

    public void AddAttribute (Attribute attr, IMemberContext context)
    {
      attr.AttachTo (this, context);

      if (attributes == null) {
        attributes = new Attributes (attr);
        return;
      }

      attributes.AddAttribute (attr);
    }

    public override void AddTypeContainer (TypeContainer tc)
    {
      AddTypeContainerMember (tc);
    }

    public override void ApplyAttributeBuilder (Attribute a, MethodSpec ctor, byte[] cdata, PredefinedAttributes pa)
    {
      if (a.Target == AttributeTargets.Assembly) {
        assembly.ApplyAttributeBuilder (a, ctor, cdata, pa);
        return;
      }

      if (a.Type == pa.DefaultCharset) {
        switch (a.GetCharSetValue ()) {
        case CharSet.Ansi:
        case CharSet.None:
          break;
        case CharSet.Auto:
          DefaultCharSet = CharSet.Auto;
          DefaultCharSetType = TypeAttributes.AutoClass;
          break;
        case CharSet.Unicode:
          DefaultCharSet = CharSet.Unicode;
          DefaultCharSetType = TypeAttributes.UnicodeClass;
          break;
        default:
          Report.Error (1724, a.Location, "Value specified for the argument to `{0}' is not valid",
            a.GetSignatureForError ());
          break;
        }
      } else if (a.Type == pa.CLSCompliant) {
        Attribute cls = DeclaringAssembly.CLSCompliantAttribute;
        if (cls == null) {
          Report.Warning (3012, 1, a.Location,
            "You must specify the CLSCompliant attribute on the assembly, not the module, to enable CLS compliance checking");
        } else if (DeclaringAssembly.IsCLSCompliant != a.GetBoolean ()) {
          Report.SymbolRelatedToPreviousError (cls.Location, cls.GetSignatureForError ());
          Report.Warning (3017, 1, a.Location,
            "You cannot specify the CLSCompliant attribute on a module that differs from the CLSCompliant attribute on the assembly");
          return;
        }
      }

      builder.SetCustomAttribute ((ConstructorInfo) ctor.GetMetaInfo (), cdata);
    }

    public override void CloseContainer ()
    {
      if (anonymous_types != null) {
        foreach (var atypes in anonymous_types)
          foreach (var at in atypes.Value)
            at.CloseContainer ();
      }

      base.CloseContainer ();
    }

    public TypeBuilder CreateBuilder (string name, TypeAttributes attr, int typeSize)
    {
      return builder.DefineType (name, attr, null, typeSize);
    }

    //
    // Creates alias global namespace
    //
    public RootNamespace CreateRootNamespace (string alias)
    {
      if (alias == global_ns.Alias) {
        RootNamespace.Error_GlobalNamespaceRedefined (Report, Location.Null);
        return global_ns;
      }

      RootNamespace rn;
      if (!alias_ns.TryGetValue (alias, out rn)) {
        rn = new RootNamespace (alias);
        alias_ns.Add (alias, rn);
      }

      return rn;
    }

    public void Create (AssemblyDefinition assembly, ModuleBuilder moduleBuilder)
    {
      this.assembly = assembly;
      builder = moduleBuilder;
    }

    public override bool Define ()
    {
      DefineContainer ();

      ExpandBaseInterfaces ();

      base.Define ();

      HasTypesFullyDefined = true;

      return true;
    }

    public override bool DefineContainer ()
    {
      DefineNamespace ();

      return base.DefineContainer ();
    }

    public void EnableRedefinition ()
    {
      is_defined = false;
    }

    public override void EmitContainer ()
    {
      if (OptAttributes != null)
        OptAttributes.Emit ();

      if (Compiler.Settings.Unsafe && !assembly.IsSatelliteAssembly) {
        var pa = PredefinedAttributes.UnverifiableCode;
        if (pa.IsDefined)
          pa.EmitAttribute (builder);
      }

      foreach (var tc in containers) {
        tc.PrepareEmit ();
      }

      base.EmitContainer ();

      if (Compiler.Report.Errors == 0 && !Compiler.Settings.WriteMetadataOnly)
        VerifyMembers ();

      if (anonymous_types != null) {
        foreach (var atypes in anonymous_types)
          foreach (var at in atypes.Value)
            at.EmitContainer ();
      }
    }

    internal override void GenerateDocComment (DocumentationBuilder builder)
    {
      foreach (var tc in containers)
        tc.GenerateDocComment (builder);
    }

    public AnonymousTypeClass GetAnonymousType (IList<AnonymousTypeParameter> parameters)
    {
      List<AnonymousTypeClass> candidates;
      if (!anonymous_types.TryGetValue (parameters.Count, out candidates))
        return null;

      int i;
      foreach (AnonymousTypeClass at in candidates) {
        for (i = 0; i < parameters.Count; ++i) {
          if (!parameters [i].Equals (at.Parameters [i]))
            break;
        }

        if (i == parameters.Count)
          return at;
      }

      return null;
    }

    //
    // Return container with awaiter definition. It never returns null
    // but all container member can be null for easier error reporting
    //
    public AwaiterDefinition GetAwaiter (TypeSpec type)
    {
      AwaiterDefinition awaiter;
      if (awaiters.TryGetValue (type, out awaiter))
        return awaiter;

      awaiter = new AwaiterDefinition ();

      //
      // Predefined: bool IsCompleted { get; } 
      //
      awaiter.IsCompleted = MemberCache.FindMember (type, MemberFilter.Property ("IsCompleted", Compiler.BuiltinTypes.Bool),
        BindingRestriction.InstanceOnly) as PropertySpec;

      //
      // Predefined: GetResult ()
      //
      // The method return type is also result type of await expression
      //
      awaiter.GetResult = MemberCache.FindMember (type, MemberFilter.Method ("GetResult", 0,
        ParametersCompiled.EmptyReadOnlyParameters, null),
        BindingRestriction.InstanceOnly) as MethodSpec;

      //
      // Predefined: INotifyCompletion.OnCompleted (System.Action)
      //
      var nc = PredefinedTypes.INotifyCompletion;
      awaiter.INotifyCompletion = !nc.Define () || type.ImplementsInterface (nc.TypeSpec, false);

      awaiters.Add (type, awaiter);
      return awaiter;
    }

    public override void GetCompletionStartingWith (string prefix, List<string> results)
    {
      var names = Evaluator.GetVarNames ();
      results.AddRange (names.Where (l => l.StartsWith (prefix)));
    }

    public RootNamespace GetRootNamespace (string name)
    {
      RootNamespace rn;
      alias_ns.TryGetValue (name, out rn);
      return rn;
    }

    public override string GetSignatureForError ()
    {
      return "<module>";
    }

    public Binary.PredefinedOperator[] GetPredefinedEnumAritmeticOperators (TypeSpec enumType, bool nullable)
    {
      TypeSpec underlying;
      Binary.Operator mask = 0;

      if (nullable) {
        underlying = Nullable.NullableInfo.GetEnumUnderlyingType (this, enumType);
        mask = Binary.Operator.NullableMask;
      } else {
        underlying = EnumSpec.GetUnderlyingType (enumType);
      }

      var operators = new[] {
        new Binary.PredefinedOperator (enumType, underlying,
          mask | Binary.Operator.AdditionMask | Binary.Operator.SubtractionMask | Binary.Operator.DecomposedMask, enumType),
        new Binary.PredefinedOperator (underlying, enumType,
          mask | Binary.Operator.AdditionMask | Binary.Operator.SubtractionMask | Binary.Operator.DecomposedMask, enumType),
        new Binary.PredefinedOperator (enumType, mask | Binary.Operator.SubtractionMask, underlying)
      };

      return operators;
    }

    public void InitializePredefinedTypes ()
    {
      predefined_attributes = new PredefinedAttributes (this);
      predefined_types = new PredefinedTypes (this);
      predefined_members = new PredefinedMembers (this);

      OperatorsBinaryEqualityLifted = Binary.CreateEqualityLiftedOperatorsTable (this);
      OperatorsBinaryLifted = Binary.CreateStandardLiftedOperatorsTable (this);
    }

    public override bool IsClsComplianceRequired ()
    {
      return DeclaringAssembly.IsCLSCompliant;
    }

    public Attribute ResolveAssemblyAttribute (PredefinedAttribute a_type)
    {
      Attribute a = OptAttributes.Search ("assembly", a_type);
      if (a != null) {
        a.Resolve ();
      }
      return a;
    }

    public void SetDeclaringAssembly (AssemblyDefinition assembly)
    {
      // TODO: This setter is quite ugly but I have not found a way around it yet
      this.assembly = assembly;
    }
  }
}