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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
commit | ed5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch) | |
tree | 7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /compilerplugins/clang/store/tutorial/tutorial3.cxx | |
parent | Initial commit. (diff) | |
download | libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.tar.xz libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.zip |
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | compilerplugins/clang/store/tutorial/tutorial3.cxx | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/compilerplugins/clang/store/tutorial/tutorial3.cxx b/compilerplugins/clang/store/tutorial/tutorial3.cxx new file mode 100644 index 000000000..33a1249a3 --- /dev/null +++ b/compilerplugins/clang/store/tutorial/tutorial3.cxx @@ -0,0 +1,77 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * Based on LLVM/Clang. + * + * This file is distributed under the University of Illinois Open Source + * License. See LICENSE.TXT for details. + * + */ + +#include "tutorial3.hxx" + +/* +This is a rewriter. + +It looks for if statements with a comparison followed by literal return false +and modifies the return statements to 'return maybereturntrue;' +*/ + +namespace loplugin +{ + +// Ctor, pass arguments. +Tutorial3::Tutorial3( const InstantiationData& data ) + : FilteringRewritePlugin( data ) + { + } + +void Tutorial3::run() + { + TraverseDecl( compiler.getASTContext().getTranslationUnitDecl()); + } + +bool Tutorial3::VisitIfStmt( const IfStmt* ifstmt ) + { + if( ignoreLocation( ifstmt )) + return true; + if( const BinaryOperator* oper = dyn_cast< BinaryOperator >( ifstmt->getCond())) + { + if( oper->getOpcode() == BO_EQ ) + { + // Modify the sub-statement if it is 'return false'. + modifyReturnFalse( ifstmt->getThen()); + // Modify the sub-statement if it is '{ return false; }'. + if( const CompoundStmt* compound = dyn_cast< CompoundStmt >( ifstmt->getThen())) + { + if( compound->size() == 1 ) // one statement + modifyReturnFalse( *compound->body_begin()); + } + } + } + return true; + } + +void Tutorial3::modifyReturnFalse( const Stmt* stmt ) + { + // Is it return statement? + if( const ReturnStmt* returnstmt = dyn_cast< ReturnStmt >( stmt )) + { + // dyn_cast_or_null<> can also be passed NULL, unlike dyn_cast<> + if( const CXXBoolLiteralExpr* boolliteral = dyn_cast_or_null< CXXBoolLiteralExpr >( returnstmt->getRetValue())) + { + if( boolliteral->getValue() == false ) + { // It is, modify the false to true using LO plugin helper function. + replaceText( boolliteral->getSourceRange(), "maybereturntrue" ); + } + } + } + } + +// Register the plugin action with the LO plugin handling. +static Plugin::Registration< Tutorial3 > tutorial3( "tutorial3" ); + +} // namespace + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |