internal EEMethodBinder(EEMethodSymbol method, MethodSymbol containingMethod, Binder next) : base(next)
{
// There are a lot of method symbols floating around and we're doing some subtle things with them.
// 1) method is the EEMethodSymbol that we're going to synthesize and hand to the debugger to evaluate.
// 2) containingMethod is the method that we are conceptually in, e.g. the method containing the
// lambda that is on top of the call stack. Any type parameters will have been replaced with the
// corresponding type parameters from (1) and its containing type.
// 3) method.SubstitutedSourceMethod is the method that we are actually in, e.g. a lambda method in
// a display class. Any type parameters will have been replaced with the corresponding type parameters
// from (1).
// So why do we need all these methods?
// 1) gives us the parameters that we need to actually bind to (it's no good to bind to the symbols
// owned by (2) or (3)). Also, it happens to contain (3), so we don't need to pass (3) explicitly.
// 2) is where we want to pretend we're binding expressions, so we make it the containing symbol of
// this binder.
// 3) is where we'll pretend to be for the purposes of looking up parameters by name. However, any
// parameters we bind to from (3) will be replaced by the corresponding parameters from (1).
_containingMethod = containingMethod;
var substitutedSourceMethod = method.SubstitutedSourceMethod;
_parameterOffset = substitutedSourceMethod.IsStatic ? 0 : 1;
_targetParameters = method.Parameters;
_sourceBinder = new InMethodBinder(substitutedSourceMethod, new BuckStopsHereBinder(next.Compilation));
}
internal EEMethodBinder(EEMethodSymbol method, MethodSymbol containingMethod, Binder next) : base(next)
{
// There are a lot of method symbols floating around and we're doing some subtle things with them.
// 1) method is the EEMethodSymbol that we're going to synthesize and hand to the debugger to evaluate.
// 2) containingMethod is the method that we are conceptually in, e.g. the method containing the
// lambda that is on top of the call stack. Any type parameters will have been replaced with the
// corresponding type parameters from (1) and its containing type.
// 3) method.SubstitutedSourceMethod is the method that we are actually in, e.g. a lambda method in
// a display class. Any type parameters will have been replaced with the corresponding type parameters
// from (1).
// So why do we need all these methods?
// 1) gives us the parameters that we need to actually bind to (it's no good to bind to the symbols
// owned by (2) or (3)). Also, it happens to contain (3), so we don't need to pass (3) explicitly.
// 2) is where we want to pretend we're binding expressions, so we make it the containing symbol of
// this binder.
// 3) is where we'll pretend to be for the purposes of looking up parameters by name. However, any
// parameters we bind to from (3) will be replaced by the corresponding parameters from (1).
_containingMethod = containingMethod;
var substitutedSourceMethod = method.SubstitutedSourceMethod;
_parameterOffset = substitutedSourceMethod.IsStatic ? 0 : 1;
_targetParameters = method.Parameters;
_sourceBinder = new InMethodBinder(substitutedSourceMethod, new BuckStopsHereBinder(next.Compilation));
}
private static Binder ExtendBinderChain(
CSharpSyntaxNode syntax,
ImmutableArray<Alias> aliases,
EEMethodSymbol method,
Binder binder,
bool hasDisplayClassThis,
bool methodNotType)
{
var substitutedSourceMethod = GetSubstitutedSourceMethod(method.SubstitutedSourceMethod, hasDisplayClassThis);
var substitutedSourceType = substitutedSourceMethod.ContainingType;
var stack = ArrayBuilder<NamedTypeSymbol>.GetInstance();
for (var type = substitutedSourceType; (object)type != null; type = type.ContainingType)
{
stack.Add(type);
}
while (stack.Count > 0)
{
substitutedSourceType = stack.Pop();
binder = new InContainerBinder(substitutedSourceType, binder);
if (substitutedSourceType.Arity > 0)
{
binder = new WithTypeArgumentsBinder(substitutedSourceType.TypeArguments, binder);
}
}
stack.Free();
if (substitutedSourceMethod.Arity > 0)
{
binder = new WithTypeArgumentsBinder(substitutedSourceMethod.TypeArguments, binder);
}
if (methodNotType)
{
// Method locals and parameters shadow pseudo-variables.
var typeNameDecoder = new EETypeNameDecoder(binder.Compilation, (PEModuleSymbol)substitutedSourceMethod.ContainingModule);
binder = new PlaceholderLocalBinder(
syntax,
aliases,
method,
typeNameDecoder,
binder);
}
binder = new EEMethodBinder(method, substitutedSourceMethod, binder);
if (methodNotType)
{
binder = new SimpleLocalScopeBinder(method.LocalsForBinding, binder);
}
return binder;
}
private static Binder ExtendBinderChain(
CSharpSyntaxNode syntax,
ImmutableArray<Alias> aliases,
EEMethodSymbol method,
Binder binder,
bool hasDisplayClassThis,
bool methodNotType,
out ImmutableArray<LocalSymbol> declaredLocals)
{
var substitutedSourceMethod = GetSubstitutedSourceMethod(method.SubstitutedSourceMethod, hasDisplayClassThis);
var substitutedSourceType = substitutedSourceMethod.ContainingType;
var stack = ArrayBuilder<NamedTypeSymbol>.GetInstance();
for (var type = substitutedSourceType; (object)type != null; type = type.ContainingType)
{
stack.Add(type);
}
while (stack.Count > 0)
{
substitutedSourceType = stack.Pop();
binder = new InContainerBinder(substitutedSourceType, binder);
if (substitutedSourceType.Arity > 0)
{
binder = new WithTypeArgumentsBinder(substitutedSourceType.TypeArguments, binder);
}
}
stack.Free();
if (substitutedSourceMethod.Arity > 0)
{
binder = new WithTypeArgumentsBinder(substitutedSourceMethod.TypeArguments, binder);
}
// Method locals and parameters shadow pseudo-variables.
// That is why we place PlaceholderLocalBinder and ExecutableCodeBinder before EEMethodBinder.
if (methodNotType)
{
var typeNameDecoder = new EETypeNameDecoder(binder.Compilation, (PEModuleSymbol)substitutedSourceMethod.ContainingModule);
binder = new PlaceholderLocalBinder(
syntax,
aliases,
method,
typeNameDecoder,
binder);
}
Binder originalRootBinder = null;
SyntaxNode declaredLocalsScopeDesignator = null;
var executableBinder = new ExecutableCodeBinder(syntax, substitutedSourceMethod, binder,
(rootBinder, declaredLocalsScopeDesignatorOpt) =>
{
originalRootBinder = rootBinder;
declaredLocalsScopeDesignator = declaredLocalsScopeDesignatorOpt;
binder = new EEMethodBinder(method, substitutedSourceMethod, rootBinder);
if (methodNotType)
{
binder = new SimpleLocalScopeBinder(method.LocalsForBinding, binder);
}
return binder;
});
// We just need to trigger the process of building the binder map
// so that the lambda above was executed.
executableBinder.GetBinder(syntax);
Debug.Assert(originalRootBinder != null);
Debug.Assert(executableBinder.Next != binder);
if (declaredLocalsScopeDesignator != null)
{
declaredLocals = originalRootBinder.GetDeclaredLocalsForScope(declaredLocalsScopeDesignator);
}
else
{
declaredLocals = ImmutableArray<LocalSymbol>.Empty;
}
return binder;
}
