clang  10.0.0svn
SelectorExtras.h
Go to the documentation of this file.
1 //=== SelectorExtras.h - Helpers for checkers using selectors -----*- C++ -*-=//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLVM_CLANG_LIB_ANALYSIS_SELECTOREXTRAS_H
10 #define LLVM_CLANG_LIB_ANALYSIS_SELECTOREXTRAS_H
11 
12 #include "clang/AST/ASTContext.h"
13 
14 namespace clang {
15 
16 template <typename... IdentifierInfos>
18  IdentifierInfos *... IIs) {
19  static_assert(sizeof...(IdentifierInfos),
20  "keyword selectors must have at least one argument");
21  SmallVector<IdentifierInfo *, 10> II({&Ctx.Idents.get(IIs)...});
22 
23  return Ctx.Selectors.getSelector(II.size(), &II[0]);
24 }
25 
26 template <typename... IdentifierInfos>
27 static inline void lazyInitKeywordSelector(Selector &Sel, ASTContext &Ctx,
28  IdentifierInfos *... IIs) {
29  if (!Sel.isNull())
30  return;
31  Sel = getKeywordSelector(Ctx, IIs...);
32 }
33 
34 } // end namespace clang
35 
36 #endif
Defines the clang::ASTContext interface.
Smart pointer class that efficiently represents Objective-C method names.
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:160
IdentifierTable & Idents
Definition: ASTContext.h:579
SelectorTable & Selectors
Definition: ASTContext.h:580
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
static void lazyInitKeywordSelector(Selector &Sel, ASTContext &Ctx, IdentifierInfos *... IIs)
static Selector getKeywordSelector(ASTContext &Ctx, IdentifierInfos *... IIs)
Dataflow Directional Tag Classes.
Selector getSelector(unsigned NumArgs, IdentifierInfo **IIV)
Can create any sort of selector.
bool isNull() const
Determine whether this is the empty selector.