43c2ba8d0c
Usually the decls and stmts are linked-in through a DeclStmt. In the case of the implicit auto keyword we cannot make the parser/sema generate a DeclStmt, because it already has taken the path of parsing an expression. Instead we add a DeclRefExpr referring the implicit auto declaration. This DeclRefExpr is very important because it gives information where to initialize the variable, i.e in which order. The implicit autofixer objective is to find the first DeclRefExpr (there might be many) referring to the implicit auto declaration and replace it with a proper DeclStmt.
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(_) (_) (_) (_) (_)(_)_ (_) (_) (_)
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(_) (_) (_) (_) (_)_ (_) (_) (_)(_)(_)
(_) _ (_) (_) (_) (_)(_) (_) (_)
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(_)(_)(_) (_)(_)(_) (_)(_)(_) (_) (_) (_)(_)(_)(_)
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1. I N S T A L L A T I O N I N S T R U C T I O N S
1.1 Dependencies
CLING source depends on the LLVM [1] and CLANG [2] headers and libraries.
You will also need CMake [3] >= 2.6.1 or GNU Make to build all of those
packages and subversion [4] to get the source code.
[1] http://llvm.org
[2] http://clang.llvm.org
[3] http://cmake.org
[4] http://subversion.tigris.org/
1.2 Building
To build LLVM and CLANG you must:
* Check out the sources:
mkdir src
cd src
svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm
cd llvm/tools
svn co http://llvm.org/svn/llvm-project/cfe/trunk clang
svn co http://root.cern.ch/svn/root/trunk/interpreter/cling cling
cd ..
* Apply some patches
cat tools/cling/patches/* | patch -p0
* Configure, build and install them, either using CMake:
cd ..
mkdir build
cd build
cmake -DCMAKE_INSTALL_PREFIX=/some/install/dir \
-DLLVM_TARGETS_TO_BUILD=CBackend\;CppBackend\;X86 \
-DCMAKE_BUILD_TYPE=Debug \
-DCMAKE_CXX_COMPILER=`which c++` \
-DCMAKE_C_COMPILER=`which gcc` \
../llvm
make
make install
or GNU Make (see ../src/configure --help for all options):
cd ..
mkdir build
cd build
../llvm/configure --prefix=/some/install/dir
make
make install
2. U S A G E
To interpret a C file type: "./cling test.c". To invoke cling in the
interactive mode type "cling" without file name. Use ".L filename" to
load libraries or C++ files. Type C++ code at the prompt to interpret it.