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 17 using namespace clang; 18 19 void Scope::Init(Scope *parent, unsigned flags) { 20 AnyParent = parent; 21 Flags = flags; 22 23 if (parent && !(flags & FnScope)) { 24 BreakParent = parent->BreakParent; 25 ContinueParent = parent->ContinueParent; 26 } else { 27 // Control scopes do not contain the contents of nested function scopes for 28 // control flow purposes. 29 BreakParent = ContinueParent = 0; 30 } 31 32 if (parent) { 33 Depth = parent->Depth + 1; 34 PrototypeDepth = parent->PrototypeDepth; 35 PrototypeIndex = 0; 36 FnParent = parent->FnParent; 37 BlockParent = parent->BlockParent; 38 TemplateParamParent = parent->TemplateParamParent; 39 } else { 40 Depth = 0; 41 PrototypeDepth = 0; 42 PrototypeIndex = 0; 43 FnParent = BlockParent = 0; 44 TemplateParamParent = 0; 45 } 46 47 // If this scope is a function or contains breaks/continues, remember it. 48 if (flags & FnScope) FnParent = this; 49 if (flags & BreakScope) BreakParent = this; 50 if (flags & ContinueScope) ContinueParent = this; 51 if (flags & BlockScope) BlockParent = this; 52 if (flags & TemplateParamScope) TemplateParamParent = this; 53 54 // If this is a prototype scope, record that. 55 if (flags & FunctionPrototypeScope) PrototypeDepth++; 56 57 DeclsInScope.clear(); 58 UsingDirectives.clear(); 59 Entity = 0; 60 ErrorTrap.reset(); 61 } 62 63 bool Scope::containedInPrototypeScope() const { 64 const Scope *S = this; 65 while (S) { 66 if (S->isFunctionPrototypeScope()) 67 return true; 68 S = S->getParent(); 69 } 70 return false; 71 } 72
