This commit updates the source code comment about using operator[] to
initialize the unordered map. Thanks to Bard's persistence we found
out that the cause is not the construction of the key value of type
std::string from const char* but the mapped type being a (mutable)
char* (due to C?).
This completes the PR #784.
g++-4.4 has problems converting const char* to char*
which it thinks is needed for constructing std::string.
Using operator[] circumvents this problem.
The compiler error fixed here was:
/usr/include/c++/4.4/bits/stl_pair.h: In constructor ‘std::pair<_T1, _T2>::pair(std::pair<_U1, _U2>&&) [with _U1 = const char*, _U2 = const char*, _T1 = const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, _T2 = char*]’:
/home/mblatt/src/dune/opm/opm-core/opm/core/linalg/LinearSolverPetsc.cpp:40: instantiated from here
/usr/include/c++/4.4/bits/stl_pair.h:107: error: invalid conversion from ‘const char*’ to ‘char*’
make[2]: *** [CMakeFiles/opmcore.dir/opm/core/linalg/LinearSolverPetsc.cpp.o] Fehler 1
The error checking macro makes it harder to read and harder to write, so
instead we now only check for functions that can contain errors. Bounds and
range checks are handled by PETSc and not OPM.
The previous implementation set plenty of values in the initialization list and
immediately overwrote these values with values looked up from the param group.
This patch makes it look up the parameteres from the param group argument,
making the constructor simpler.
Petsc only supports initialisation through the ParameterGroup constructor.
Calling the default, non-arg constructor is a static error, and not
implementing it makes using it break compiles.
call_petsc.c was really a thin C wrapper around the call to petsc itself and
turns out was mostly unnecessary C++ emulation. This removes the file entirely
and ports its functionality into LinearSolverPetsc.cpp.
All features from the file should now be more readable as well as properly
utilising modern C++ features.
The patch uses the CHKERRXX macro from petsc to handle errors reported by
petsc, and currently does not handle this and give the control back to OPM's
error/throw system.
