internal EENamedTypeSymbol(
NamespaceSymbol container,
NamedTypeSymbol baseType,
CSharpSyntaxNode syntax,
MethodSymbol currentFrame,
string typeName,
string methodName,
CompilationContext context,
GenerateMethodBody generateMethodBody) :
this(container, baseType, currentFrame, typeName, (m, t) => ImmutableArray.Create <MethodSymbol>(context.CreateMethod(t, methodName, syntax, generateMethodBody)))
{
}
internal EENamedTypeSymbol(
NamespaceSymbol container,
NamedTypeSymbol baseType,
CSharpSyntaxNode syntax,
MethodSymbol currentFrame,
string typeName,
string methodName,
CompilationContext context,
GenerateMethodBody generateMethodBody) :
this(container, baseType, syntax, currentFrame, typeName, (m, t) => ImmutableArray.Create<MethodSymbol>(context.CreateMethod(t, methodName, syntax, generateMethodBody)))
{
}
internal EEMethodSymbol(
EENamedTypeSymbol container,
string name,
Location location,
MethodSymbol sourceMethod,
ImmutableArray <LocalSymbol> sourceLocals,
ImmutableArray <LocalSymbol> sourceLocalsForBinding,
ImmutableDictionary <string, DisplayClassVariable> sourceDisplayClassVariables,
GenerateMethodBody generateMethodBody)
{
Debug.Assert(sourceMethod.IsDefinition);
Debug.Assert(sourceMethod.ContainingSymbol == container.SubstitutedSourceType.OriginalDefinition);
Debug.Assert(sourceLocals.All(l => l.ContainingSymbol == sourceMethod));
_container = container;
_name = name;
_locations = ImmutableArray.Create(location);
// What we want is to map all original type parameters to the corresponding new type parameters
// (since the old ones have the wrong owners). Unfortunately, we have a circular dependency:
// 1) Each new type parameter requires the entire map in order to be able to construct its constraint list.
// 2) The map cannot be constructed until all new type parameters exist.
// Our solution is to pass each new type parameter a lazy reference to the type map. We then
// initialize the map as soon as the new type parameters are available - and before they are
// handed out - so that there is never a period where they can require the type map and find
// it uninitialized.
var sourceMethodTypeParameters = sourceMethod.TypeParameters;
var allSourceTypeParameters = container.SourceTypeParameters.Concat(sourceMethodTypeParameters);
var getTypeMap = new Func <TypeMap>(() => this.TypeMap);
_typeParameters = sourceMethodTypeParameters.SelectAsArray(
(tp, i, arg) => (TypeParameterSymbol) new EETypeParameterSymbol(this, tp, i, getTypeMap),
(object)null);
_allTypeParameters = container.TypeParameters.Concat(_typeParameters);
this.TypeMap = new TypeMap(allSourceTypeParameters, _allTypeParameters);
EENamedTypeSymbol.VerifyTypeParameters(this, _typeParameters);
var substitutedSourceType = container.SubstitutedSourceType;
this.SubstitutedSourceMethod = sourceMethod.AsMember(substitutedSourceType);
if (sourceMethod.Arity > 0)
{
this.SubstitutedSourceMethod = this.SubstitutedSourceMethod.Construct(_typeParameters.As <TypeSymbol>());
}
TypeParameterChecker.Check(this.SubstitutedSourceMethod, _allTypeParameters);
// Create a map from original parameter to target parameter.
var parameterBuilder = ArrayBuilder <ParameterSymbol> .GetInstance();
var substitutedSourceThisParameter = this.SubstitutedSourceMethod.ThisParameter;
var substitutedSourceHasThisParameter = (object)substitutedSourceThisParameter != null;
if (substitutedSourceHasThisParameter)
{
_thisParameter = MakeParameterSymbol(0, GeneratedNames.ThisProxyFieldName(), substitutedSourceThisParameter);
Debug.Assert(_thisParameter.Type == this.SubstitutedSourceMethod.ContainingType);
parameterBuilder.Add(_thisParameter);
}
var ordinalOffset = (substitutedSourceHasThisParameter ? 1 : 0);
foreach (var substitutedSourceParameter in this.SubstitutedSourceMethod.Parameters)
{
var ordinal = substitutedSourceParameter.Ordinal + ordinalOffset;
Debug.Assert(ordinal == parameterBuilder.Count);
var parameter = MakeParameterSymbol(ordinal, substitutedSourceParameter.Name, substitutedSourceParameter);
parameterBuilder.Add(parameter);
}
_parameters = parameterBuilder.ToImmutableAndFree();
var localsBuilder = ArrayBuilder <LocalSymbol> .GetInstance();
var localsMap = PooledDictionary <LocalSymbol, LocalSymbol> .GetInstance();
foreach (var sourceLocal in sourceLocals)
{
var local = sourceLocal.ToOtherMethod(this, this.TypeMap);
localsMap.Add(sourceLocal, local);
localsBuilder.Add(local);
}
this.Locals = localsBuilder.ToImmutableAndFree();
localsBuilder = ArrayBuilder <LocalSymbol> .GetInstance();
foreach (var sourceLocal in sourceLocalsForBinding)
{
LocalSymbol local;
if (!localsMap.TryGetValue(sourceLocal, out local))
{
local = sourceLocal.ToOtherMethod(this, this.TypeMap);
localsMap.Add(sourceLocal, local);
}
localsBuilder.Add(local);
}
this.LocalsForBinding = localsBuilder.ToImmutableAndFree();
// Create a map from variable name to display class field.
var displayClassVariables = PooledDictionary <string, DisplayClassVariable> .GetInstance();
foreach (var pair in sourceDisplayClassVariables)
{
var variable = pair.Value;
var oldDisplayClassInstance = variable.DisplayClassInstance;
// Note: we don't call ToOtherMethod in the local case because doing so would produce
// a new LocalSymbol that would not be ReferenceEquals to the one in this.LocalsForBinding.
var oldDisplayClassInstanceFromLocal = oldDisplayClassInstance as DisplayClassInstanceFromLocal;
var newDisplayClassInstance = (oldDisplayClassInstanceFromLocal == null) ?
oldDisplayClassInstance.ToOtherMethod(this, this.TypeMap) :
new DisplayClassInstanceFromLocal((EELocalSymbol)localsMap[oldDisplayClassInstanceFromLocal.Local]);
variable = variable.SubstituteFields(newDisplayClassInstance, this.TypeMap);
displayClassVariables.Add(pair.Key, variable);
}
_displayClassVariables = displayClassVariables.ToImmutableDictionary();
displayClassVariables.Free();
localsMap.Free();
_generateMethodBody = generateMethodBody;
}
internal EEMethodSymbol CreateMethod(
EENamedTypeSymbol container,
string methodName,
CSharpSyntaxNode syntax,
GenerateMethodBody generateMethodBody)
{
return new EEMethodSymbol(
container,
methodName,
syntax.Location,
_currentFrame,
_locals,
_localsForBinding,
_displayClassVariables,
generateMethodBody);
}
internal EEMethodSymbol(
EENamedTypeSymbol container,
string name,
Location location,
MethodSymbol sourceMethod,
ImmutableArray<LocalSymbol> sourceLocals,
ImmutableArray<LocalSymbol> sourceLocalsForBinding,
ImmutableDictionary<string, DisplayClassVariable> sourceDisplayClassVariables,
GenerateMethodBody generateMethodBody)
{
Debug.Assert(sourceMethod.IsDefinition);
Debug.Assert(sourceMethod.ContainingSymbol == container.SubstitutedSourceType.OriginalDefinition);
Debug.Assert(sourceLocals.All(l => l.ContainingSymbol == sourceMethod));
_container = container;
_name = name;
_locations = ImmutableArray.Create(location);
// What we want is to map all original type parameters to the corresponding new type parameters
// (since the old ones have the wrong owners). Unfortunately, we have a circular dependency:
// 1) Each new type parameter requires the entire map in order to be able to construct its constraint list.
// 2) The map cannot be constructed until all new type parameters exist.
// Our solution is to pass each new type parameter a lazy reference to the type map. We then
// initialize the map as soon as the new type parameters are available - and before they are
// handed out - so that there is never a period where they can require the type map and find
// it uninitialized.
var sourceMethodTypeParameters = sourceMethod.TypeParameters;
var allSourceTypeParameters = container.SourceTypeParameters.Concat(sourceMethodTypeParameters);
var getTypeMap = new Func<TypeMap>(() => this.TypeMap);
_typeParameters = sourceMethodTypeParameters.SelectAsArray(
(tp, i, arg) => (TypeParameterSymbol)new EETypeParameterSymbol(this, tp, i, getTypeMap),
(object)null);
_allTypeParameters = container.TypeParameters.Concat(_typeParameters);
this.TypeMap = new TypeMap(allSourceTypeParameters, _allTypeParameters);
EENamedTypeSymbol.VerifyTypeParameters(this, _typeParameters);
var substitutedSourceType = container.SubstitutedSourceType;
this.SubstitutedSourceMethod = sourceMethod.AsMember(substitutedSourceType);
if (sourceMethod.Arity > 0)
{
this.SubstitutedSourceMethod = this.SubstitutedSourceMethod.Construct(_typeParameters.As<TypeSymbol>());
}
TypeParameterChecker.Check(this.SubstitutedSourceMethod, _allTypeParameters);
// Create a map from original parameter to target parameter.
var parameterBuilder = ArrayBuilder<ParameterSymbol>.GetInstance();
var substitutedSourceThisParameter = this.SubstitutedSourceMethod.ThisParameter;
var substitutedSourceHasThisParameter = (object)substitutedSourceThisParameter != null;
if (substitutedSourceHasThisParameter)
{
_thisParameter = MakeParameterSymbol(0, GeneratedNames.ThisProxyFieldName(), substitutedSourceThisParameter);
Debug.Assert(_thisParameter.Type == this.SubstitutedSourceMethod.ContainingType);
parameterBuilder.Add(_thisParameter);
}
var ordinalOffset = (substitutedSourceHasThisParameter ? 1 : 0);
foreach (var substitutedSourceParameter in this.SubstitutedSourceMethod.Parameters)
{
var ordinal = substitutedSourceParameter.Ordinal + ordinalOffset;
Debug.Assert(ordinal == parameterBuilder.Count);
var parameter = MakeParameterSymbol(ordinal, substitutedSourceParameter.Name, substitutedSourceParameter);
parameterBuilder.Add(parameter);
}
_parameters = parameterBuilder.ToImmutableAndFree();
var localsBuilder = ArrayBuilder<LocalSymbol>.GetInstance();
var localsMap = PooledDictionary<LocalSymbol, LocalSymbol>.GetInstance();
foreach (var sourceLocal in sourceLocals)
{
var local = sourceLocal.ToOtherMethod(this, this.TypeMap);
localsMap.Add(sourceLocal, local);
localsBuilder.Add(local);
}
this.Locals = localsBuilder.ToImmutableAndFree();
localsBuilder = ArrayBuilder<LocalSymbol>.GetInstance();
foreach (var sourceLocal in sourceLocalsForBinding)
{
LocalSymbol local;
if (!localsMap.TryGetValue(sourceLocal, out local))
{
local = sourceLocal.ToOtherMethod(this, this.TypeMap);
localsMap.Add(sourceLocal, local);
}
localsBuilder.Add(local);
}
this.LocalsForBinding = localsBuilder.ToImmutableAndFree();
// Create a map from variable name to display class field.
var displayClassVariables = PooledDictionary<string, DisplayClassVariable>.GetInstance();
foreach (var pair in sourceDisplayClassVariables)
{
var variable = pair.Value;
var displayClassInstanceFromLocal = variable.DisplayClassInstance as DisplayClassInstanceFromLocal;
var displayClassInstance = (displayClassInstanceFromLocal == null) ?
(DisplayClassInstance)new DisplayClassInstanceFromThis(_parameters[0]) :
new DisplayClassInstanceFromLocal((EELocalSymbol)localsMap[displayClassInstanceFromLocal.Local]);
variable = variable.SubstituteFields(displayClassInstance, this.TypeMap);
displayClassVariables.Add(pair.Key, variable);
}
_displayClassVariables = displayClassVariables.ToImmutableDictionary();
displayClassVariables.Free();
localsMap.Free();
_generateMethodBody = generateMethodBody;
}
