clang  7.0.0svn
ObjCRuntime.cpp
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1 //===- ObjCRuntime.cpp - Objective-C Runtime Handling ---------------------===//
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 ObjCRuntime class, which represents the
11 // target Objective-C runtime.
12 //
13 //===----------------------------------------------------------------------===//
14 
16 #include "llvm/ADT/StringRef.h"
17 #include "llvm/Support/VersionTuple.h"
18 #include "llvm/Support/raw_ostream.h"
19 #include <cstddef>
20 #include <string>
21 
22 using namespace clang;
23 
24 std::string ObjCRuntime::getAsString() const {
25  std::string Result;
26  {
27  llvm::raw_string_ostream Out(Result);
28  Out << *this;
29  }
30  return Result;
31 }
32 
33 raw_ostream &clang::operator<<(raw_ostream &out, const ObjCRuntime &value) {
34  switch (value.getKind()) {
35  case ObjCRuntime::MacOSX: out << "macosx"; break;
36  case ObjCRuntime::FragileMacOSX: out << "macosx-fragile"; break;
37  case ObjCRuntime::iOS: out << "ios"; break;
38  case ObjCRuntime::WatchOS: out << "watchos"; break;
39  case ObjCRuntime::GNUstep: out << "gnustep"; break;
40  case ObjCRuntime::GCC: out << "gcc"; break;
41  case ObjCRuntime::ObjFW: out << "objfw"; break;
42  }
43  if (value.getVersion() > VersionTuple(0)) {
44  out << '-' << value.getVersion();
45  }
46  return out;
47 }
48 
49 bool ObjCRuntime::tryParse(StringRef input) {
50  // Look for the last dash.
51  std::size_t dash = input.rfind('-');
52 
53  // We permit dashes in the runtime name, and we also permit the
54  // version to be omitted, so if we see a dash not followed by a
55  // digit then we need to ignore it.
56  if (dash != StringRef::npos && dash + 1 != input.size() &&
57  (input[dash+1] < '0' || input[dash+1] > '9')) {
58  dash = StringRef::npos;
59  }
60 
61  // Everything prior to that must be a valid string name.
62  Kind kind;
63  StringRef runtimeName = input.substr(0, dash);
64  Version = VersionTuple(0);
65  if (runtimeName == "macosx") {
66  kind = ObjCRuntime::MacOSX;
67  } else if (runtimeName == "macosx-fragile") {
69  } else if (runtimeName == "ios") {
70  kind = ObjCRuntime::iOS;
71  } else if (runtimeName == "watchos") {
72  kind = ObjCRuntime::WatchOS;
73  } else if (runtimeName == "gnustep") {
74  // If no version is specified then default to the most recent one that we
75  // know about.
76  Version = VersionTuple(1, 6);
77  kind = ObjCRuntime::GNUstep;
78  } else if (runtimeName == "gcc") {
79  kind = ObjCRuntime::GCC;
80  } else if (runtimeName == "objfw") {
81  kind = ObjCRuntime::ObjFW;
82  Version = VersionTuple(0, 8);
83  } else {
84  return true;
85  }
86  TheKind = kind;
87 
88  if (dash != StringRef::npos) {
89  StringRef verString = input.substr(dash + 1);
90  if (Version.tryParse(verString))
91  return true;
92  }
93 
94  if (kind == ObjCRuntime::ObjFW && Version > VersionTuple(0, 8))
95  Version = VersionTuple(0, 8);
96 
97  return false;
98 }
__SIZE_TYPE__ size_t
The unsigned integer type of the result of the sizeof operator.
Definition: opencl-c.h:60
Defines types useful for describing an Objective-C runtime.
const DiagnosticBuilder & operator<<(const DiagnosticBuilder &DB, const Attr *At)
Definition: Attr.h:322
&#39;gcc&#39; is the Objective-C runtime shipped with GCC, implementing a fragile Objective-C ABI ...
Definition: ObjCRuntime.h:53
&#39;macosx-fragile&#39; is the Apple-provided NeXT-derived runtime on Mac OS X platforms that use the fragil...
Definition: ObjCRuntime.h:40
&#39;watchos&#39; is a variant of iOS for Apple&#39;s watchOS.
Definition: ObjCRuntime.h:49
&#39;macosx&#39; is the Apple-provided NeXT-derived runtime on Mac OS X platforms that use the non-fragile AB...
Definition: ObjCRuntime.h:35
std::string getAsString() const
Definition: ObjCRuntime.cpp:24
bool tryParse(StringRef input)
Try to parse an Objective-C runtime specification from the given string.
Definition: ObjCRuntime.cpp:49
The result type of a method or function.
&#39;gnustep&#39; is the modern non-fragile GNUstep runtime.
Definition: ObjCRuntime.h:56
&#39;objfw&#39; is the Objective-C runtime included in ObjFW
Definition: ObjCRuntime.h:59
Kind getKind() const
Definition: ObjCRuntime.h:77
const VersionTuple & getVersion() const
Definition: ObjCRuntime.h:78
Dataflow Directional Tag Classes.
The basic abstraction for the target Objective-C runtime.
Definition: ObjCRuntime.h:28
&#39;ios&#39; is the Apple-provided NeXT-derived runtime on iOS or the iOS simulator; it is always non-fragil...
Definition: ObjCRuntime.h:45
unsigned kind
All of the diagnostics that can be emitted by the frontend.
Definition: DiagnosticIDs.h:61
Kind
The basic Objective-C runtimes that we know about.
Definition: ObjCRuntime.h:31