Scope.cpp revision 221339 
1//===- Scope.cpp - Lexical scope information --------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the Scope class, which is used for recording
11// information about a lexical scope.
12//
13//===----------------------------------------------------------------------===//
14
15#include "clang/Sema/Scope.h"
16
17using namespace clang;
18
19void Scope::Init(Scope *parent, unsigned flags) {
20  AnyParent = parent;
21  Flags = flags;
22
23  if (parent) {
24    Depth = parent->Depth + 1;
25    PrototypeDepth = parent->PrototypeDepth;
26    PrototypeIndex = 0;
27    FnParent       = parent->FnParent;
28    BreakParent    = parent->BreakParent;
29    ContinueParent = parent->ContinueParent;
30    ControlParent  = parent->ControlParent;
31    BlockParent    = parent->BlockParent;
32    TemplateParamParent = parent->TemplateParamParent;
33  } else {
34    Depth = 0;
35    PrototypeDepth = 0;
36    PrototypeIndex = 0;
37    FnParent = BreakParent = ContinueParent = BlockParent = 0;
38    ControlParent = 0;
39    TemplateParamParent = 0;
40  }
41
42  // If this scope is a function or contains breaks/continues, remember it.
43  if (flags & FnScope)            FnParent = this;
44  if (flags & BreakScope)         BreakParent = this;
45  if (flags & ContinueScope)      ContinueParent = this;
46  if (flags & ControlScope)       ControlParent = this;
47  if (flags & BlockScope)         BlockParent = this;
48  if (flags & TemplateParamScope) TemplateParamParent = this;
49
50  // If this is a prototype scope, record that.
51  if (flags & FunctionPrototypeScope) PrototypeDepth++;
52
53  DeclsInScope.clear();
54  UsingDirectives.clear();
55  Entity = 0;
56  ErrorTrap.reset();
57}
58