Visibility.h revision 218887 
1//===--- Visibility.h - Visibility enumeration and utilities ----*- 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 defines the Visibility enumeration and various utility
11// functions.
12//
13//===----------------------------------------------------------------------===//
14#ifndef LLVM_CLANG_BASIC_VISIBILITY_H
15#define LLVM_CLANG_BASIC_VISIBILITY_H
16
17namespace clang {
18
19/// \link Describes the different kinds of visibility that a
20/// declaration may have.  Visibility determines how a declaration
21/// interacts with the dynamic linker.  It may also affect whether the
22/// symbol can be found by runtime symbol lookup APIs.
23///
24/// Visibility is not described in any language standard and
25/// (nonetheless) sometimes has odd behavior.  Not all platforms
26/// support all visibility kinds.
27enum Visibility {
28  /// Objects with "hidden" visibility are not seen by the dynamic
29  /// linker.
30  HiddenVisibility,
31
32  /// Objects with "protected" visibility are seen by the dynamic
33  /// linker but always dynamically resolve to an object within this
34  /// shared object.
35  ProtectedVisibility,
36
37  /// Objects with "default" visibility are seen by the dynamic linker
38  /// and act like normal objects.
39  DefaultVisibility
40};
41
42inline Visibility minVisibility(Visibility L, Visibility R) {
43  return L < R ? L : R;
44}
45
46}
47
48#endif // LLVM_CLANG_BASIC_VISIBILITY_H
49