Add clang-tidy to the project

Enable all warnings and then disable ones generating false positives and
ones with little signal/noise ratio.

.clang-tidy

@@ -0,0 +1,44 @@
+---
+Checks: '*,-cppcoreguidelines-avoid-magic-numbers,-readability-magic-numbers,-llvmlibc-implementation-in-namespace,-llvmlibc-callee-namespace,-llvmlibc-restrict-system-libc-headers,-llvm-header-guard,-llvm-include-order,-modernize-use-trailing-return-type,-google-readability-todo,-hicpp-signed-bitwise,-readability-identifier-length,-fuchsia-trailing-return,-cppcoreguidelines-pro-bounds-constant-array-index,-cppcoreguidelines-macro-usage,-bugprone-macro-parentheses,-fuchsia-default-arguments-calls,-hicpp-uppercase-literal-suffix,-readability-uppercase-literal-suffix,-llvm-namespace-comment,-altera-unroll-loops,-altera-id-dependent-backward-branch,-altera-struct-pack-align,-cppcoreguidelines-pro-type-union-access,-bugprone-implicit-widening-of-multiplication-result,-concurrency-mt-unsafe,-fuchsia-default-arguments-declarations,-bugprone-easily-swappable-parameters,-readability-suspicious-call-argument'
+WarningsAsErrors: '*'
+HeaderFilterRegex: '.*'
+AnalyzeTemporaryDtors: false
+FormatStyle: file
+CheckOptions:
+  - key: llvm-else-after-return.WarnOnConditionVariables
+    value: 'false'
+  - key: modernize-loop-convert.MinConfidence
+    value: reasonable
+  - key: modernize-replace-auto-ptr.IncludeStyle
+    value: llvm
+  - key: cert-str34-c.DiagnoseSignedUnsignedCharComparisons
+    value: 'false'
+  - key: google-readability-namespace-comments.ShortNamespaceLines
+    value: '10'
+  - key: cert-err33-c.CheckedFunctions
+    value: '::aligned_alloc;::asctime_s;::at_quick_exit;::atexit;::bsearch;::bsearch_s;::btowc;::c16rtomb;::c32rtomb;::calloc;::clock;::cnd_broadcast;::cnd_init;::cnd_signal;::cnd_timedwait;::cnd_wait;::ctime_s;::fclose;::fflush;::fgetc;::fgetpos;::fgets;::fgetwc;::fopen;::fopen_s;::fprintf;::fprintf_s;::fputc;::fputs;::fputwc;::fputws;::fread;::freopen;::freopen_s;::fscanf;::fscanf_s;::fseek;::fsetpos;::ftell;::fwprintf;::fwprintf_s;::fwrite;::fwscanf;::fwscanf_s;::getc;::getchar;::getenv;::getenv_s;::gets_s;::getwc;::getwchar;::gmtime;::gmtime_s;::localtime;::localtime_s;::malloc;::mbrtoc16;::mbrtoc32;::mbsrtowcs;::mbsrtowcs_s;::mbstowcs;::mbstowcs_s;::memchr;::mktime;::mtx_init;::mtx_lock;::mtx_timedlock;::mtx_trylock;::mtx_unlock;::printf_s;::putc;::putwc;::raise;::realloc;::remove;::rename;::scanf;::scanf_s;::setlocale;::setvbuf;::signal;::snprintf;::snprintf_s;::sprintf;::sprintf_s;::sscanf;::sscanf_s;::strchr;::strerror_s;::strftime;::strpbrk;::strrchr;::strstr;::strtod;::strtof;::strtoimax;::strtok;::strtok_s;::strtol;::strtold;::strtoll;::strtoul;::strtoull;::strtoumax;::strxfrm;::swprintf;::swprintf_s;::swscanf;::swscanf_s;::thrd_create;::thrd_detach;::thrd_join;::thrd_sleep;::time;::timespec_get;::tmpfile;::tmpfile_s;::tmpnam;::tmpnam_s;::tss_create;::tss_get;::tss_set;::ungetc;::ungetwc;::vfprintf;::vfprintf_s;::vfscanf;::vfscanf_s;::vfwprintf;::vfwprintf_s;::vfwscanf;::vfwscanf_s;::vprintf_s;::vscanf;::vscanf_s;::vsnprintf;::vsnprintf_s;::vsprintf;::vsprintf_s;::vsscanf;::vsscanf_s;::vswprintf;::vswprintf_s;::vswscanf;::vswscanf_s;::vwprintf_s;::vwscanf;::vwscanf_s;::wcrtomb;::wcschr;::wcsftime;::wcspbrk;::wcsrchr;::wcsrtombs;::wcsrtombs_s;::wcsstr;::wcstod;::wcstof;::wcstoimax;::wcstok;::wcstok_s;::wcstol;::wcstold;::wcstoll;::wcstombs;::wcstombs_s;::wcstoul;::wcstoull;::wcstoumax;::wcsxfrm;::wctob;::wctrans;::wctype;::wmemchr;::wprintf_s;::wscanf;::wscanf_s;'
+  - key: cert-oop54-cpp.WarnOnlyIfThisHasSuspiciousField
+    value: 'false'
+  - key: cert-dcl16-c.NewSuffixes
+    value: 'L;LL;LU;LLU'
+  - key: google-readability-braces-around-statements.ShortStatementLines
+    value: '1'
+  - key: cppcoreguidelines-non-private-member-variables-in-classes.IgnoreClassesWithAllMemberVariablesBeingPublic
+    value: 'true'
+  - key: google-readability-namespace-comments.SpacesBeforeComments
+    value: '2'
+  - key: modernize-loop-convert.MaxCopySize
+    value: '16'
+  - key: modernize-pass-by-value.IncludeStyle
+    value: llvm
+  - key: modernize-use-nullptr.NullMacros
+    value: 'NULL'
+  - key: llvm-qualified-auto.AddConstToQualified
+    value: 'false'
+  - key: modernize-loop-convert.NamingStyle
+    value: CamelCase
+  - key: llvm-else-after-return.WarnOnUnfixable
+    value: 'false'
+  - key: google-readability-function-size.StatementThreshold
+    value: '800'
+...

CMakeLists.txt

@@ -23,5 +23,7 @@ set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/modules
 set(CLANG_FORMAT_EXCLUDE_PATTERNS "src/bindings" ${CMAKE_BINARY_DIR})
 find_package(ClangFormat)
 
+include(clang-tidy)
+
 add_subdirectory(src)
-add_subdirectory(tests)
+add_subdirectory(src/tests)