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1 //=== SelectorExtras.h - Helpers for checkers using selectors -----*- 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 #ifndef LLVM_CLANG_LIB_STATICANALYZER_CHECKERS_SELECTOREXTRAS_H
11 #define LLVM_CLANG_LIB_STATICANALYZER_CHECKERS_SELECTOREXTRAS_H
12 
13 #include "clang/AST/ASTContext.h"
14 #include <cstdarg>
15 
16 namespace clang {
17 namespace ento {
18 
getKeywordSelectorImpl(ASTContext & Ctx,const char * First,va_list argp)19 static inline Selector getKeywordSelectorImpl(ASTContext &Ctx,
20                                               const char *First,
21                                               va_list argp) {
22   SmallVector<IdentifierInfo*, 10> II;
23   II.push_back(&Ctx.Idents.get(First));
24 
25   while (const char *s = va_arg(argp, const char *))
26     II.push_back(&Ctx.Idents.get(s));
27 
28   return Ctx.Selectors.getSelector(II.size(), &II[0]);
29 }
30 
getKeywordSelector(ASTContext & Ctx,va_list argp)31 static inline Selector getKeywordSelector(ASTContext &Ctx, va_list argp) {
32   const char *First = va_arg(argp, const char *);
33   assert(First && "keyword selectors must have at least one argument");
34   return getKeywordSelectorImpl(Ctx, First, argp);
35 }
36 
37 LLVM_END_WITH_NULL
getKeywordSelector(ASTContext & Ctx,const char * First,...)38 static inline Selector getKeywordSelector(ASTContext &Ctx,
39                                           const char *First, ...) {
40   va_list argp;
41   va_start(argp, First);
42   Selector result = getKeywordSelectorImpl(Ctx, First, argp);
43   va_end(argp);
44   return result;
45 }
46 
47 LLVM_END_WITH_NULL
lazyInitKeywordSelector(Selector & Sel,ASTContext & Ctx,const char * First,...)48 static inline void lazyInitKeywordSelector(Selector &Sel, ASTContext &Ctx,
49                                            const char *First, ...) {
50   if (!Sel.isNull())
51     return;
52   va_list argp;
53   va_start(argp, First);
54   Sel = getKeywordSelectorImpl(Ctx, First, argp);
55   va_end(argp);
56 }
57 
lazyInitNullarySelector(Selector & Sel,ASTContext & Ctx,const char * Name)58 static inline void lazyInitNullarySelector(Selector &Sel, ASTContext &Ctx,
59                                            const char *Name) {
60   if (!Sel.isNull())
61     return;
62   Sel = GetNullarySelector(Name, Ctx);
63 }
64 
65 } // end namespace ento
66 } // end namespace clang
67 
68 #endif
69