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ClingRAII.h
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1// @(#)root/core/meta:$Id$
2// Author: Axel Naumann November 2016
3
4/*************************************************************************
5 * Copyright (C) 1995-2012, Rene Brun and Fons Rademakers. *
6 * All rights reserved. *
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. *
9 * For the list of contributors see $ROOTSYS/README/CREDITS. *
10 *************************************************************************/
11
12#include "clang/Sema/Sema.h"
13#include "cling/Utils/ParserStateRAII.h"
14#include "clang/Lex/Preprocessor.h"
15#include "clang/Sema/ScopeInfo.h"
16
17namespace ROOT {
18 namespace Internal {
19
20 ////////////////////////////////////////////////////////////////////////////////
21 /// RAII used to store Parser, Sema, Preprocessor state for recursive parsing.
24 decltype(clang::Sema::Cleanup) fCleanup;
25 decltype(clang::Sema::ExprCleanupObjects) fExprCleanupObjects;
26 decltype(clang::Sema::MaybeODRUseExprs) fMaybeODRUseExprs;
27 decltype(clang::Sema::FunctionScopes) fFunctionScopes;
28 decltype(clang::Sema::UndefinedButUsed) fUndefinedButUsed;
29 clang::Sema& fSema;
30 void Swapem() {
31 std::swap(fCleanup, fSema.Cleanup);
32 std::swap(fExprCleanupObjects, fSema.ExprCleanupObjects);
33 std::swap(fMaybeODRUseExprs, fSema.MaybeODRUseExprs);
34 std::swap(fFunctionScopes, fSema.FunctionScopes);
35 std::swap(fUndefinedButUsed, fSema.UndefinedButUsed);
36 }
37 SemaExprCleanupsRAII(clang::Sema& S): fSema(S) {
38 fFunctionScopes.push_back(new clang::sema::FunctionScopeInfo(S.Diags));
39 Swapem();
40 };
42 Swapem();
43 assert(fFunctionScopes.size() == 1 && "Expected only my FunctionScopeInfo.");
44 delete fFunctionScopes.back();
45 }
46 };
47
49 using PIFAV_t = decltype(clang::Sema::ParsingInitForAutoVars);
53 fSavedPIFAV.swap(PIFAV);
54 }
57 }
58 };
59
60 clang::Preprocessor::CleanupAndRestoreCacheRAII fCleanupRAII;
61 clang::Parser::ParserCurTokRestoreRAII fSavedCurToken;
62 cling::ParserStateRAII fParserRAII;
63
64 // Buffer the delayed infos when doing recursive parsing.
65 clang::Sema::DelayedInfoRAII fSemaInfoRAII;
66
68
69 // We can't PushDeclContext, because we go up and the routine that pops
70 // the DeclContext assumes that we drill down always.
71 // We have to be on the global context. At that point we are in a
72 // wrapper function so the parent context must be the global.
73 clang::Sema::ContextAndScopeRAII fPushedDCAndS;
74
76
77 clang::Sema::SavePendingInstantiationsRAII fPendingInstantiations;
78
79
80 ParsingStateRAII(clang::Parser& parser, clang::Sema& sema):
81 fCleanupRAII(sema.getPreprocessor()),
82 fSavedCurToken(parser),
83 fParserRAII(parser, false /*skipToEOF*/),
85 fPushedDCAndS(sema, sema.getASTContext().getTranslationUnitDecl(),
86 sema.TUScope),
87 fSemaParsingInitForAutoVarsRAII(sema.ParsingInitForAutoVars),
89 {
90 // After we have saved the token reset the current one to something which
91 // is safe (semi colon usually means empty decl)
92 clang::Token& Tok = const_cast<clang::Token&>(parser.getCurToken());
93 Tok.setKind(clang::tok::semi);
94 }
95 };
96
97}
98}
void swap(RDirectoryEntry &e1, RDirectoryEntry &e2) noexcept
This file contains a specialised ROOT message handler to test for diagnostic in unit tests.
RooArgSet S(Args_t &&... args)
Definition: RooArgSet.h:240
decltype(clang::Sema::FunctionScopes) fFunctionScopes
Definition: ClingRAII.h:27
decltype(clang::Sema::MaybeODRUseExprs) fMaybeODRUseExprs
Definition: ClingRAII.h:26
decltype(clang::Sema::UndefinedButUsed) fUndefinedButUsed
Definition: ClingRAII.h:28
decltype(clang::Sema::ExprCleanupObjects) fExprCleanupObjects
Definition: ClingRAII.h:25
decltype(clang::Sema::ParsingInitForAutoVars) PIFAV_t
Definition: ClingRAII.h:49
RAII used to store Parser, Sema, Preprocessor state for recursive parsing.
Definition: ClingRAII.h:22
clang::Preprocessor::CleanupAndRestoreCacheRAII fCleanupRAII
Definition: ClingRAII.h:60
cling::ParserStateRAII fParserRAII
Definition: ClingRAII.h:62
clang::Sema::SavePendingInstantiationsRAII fPendingInstantiations
Definition: ClingRAII.h:77
SemaExprCleanupsRAII fSemaExprCleanupsRAII
Definition: ClingRAII.h:67
clang::Sema::DelayedInfoRAII fSemaInfoRAII
Definition: ClingRAII.h:65
clang::Sema::ContextAndScopeRAII fPushedDCAndS
Definition: ClingRAII.h:73
SemaParsingInitForAutoVarsRAII fSemaParsingInitForAutoVarsRAII
Definition: ClingRAII.h:75
ParsingStateRAII(clang::Parser &parser, clang::Sema &sema)
Definition: ClingRAII.h:80
clang::Parser::ParserCurTokRestoreRAII fSavedCurToken
Definition: ClingRAII.h:61