Error Handling

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This page contains links and discussions on Lua error handling, including exception handling.

Programming in Lua and Beginning Lua Programming (see LuaBooks) contain sections on error handling.
Lua Reference 5.1 Manual:
- Background discussion: [2.7. Error Handling (in Lua)], [3.6. Error Handling in C]
- To raise an error: [error], [lua_error] (C version with error object), [luaL_error] (C version with printf-style format string)
- To raise an error conditionally: [assert] - see also: [naming of this function]
- To catch errors on function call: [pcall], [xpcall] (with error handler function)
- To catch uncatched errors: [lua_atpanic]
- To get stack trace: [debug.traceback], [luaL_traceback] (C version, 5.2-alpha)
- To raise errors on bad arguments in C: [luaL_argerror] and luaL_check* functions,[luaL_typerror] (luaL_typerror deprecated in LuaFiveTwo)
[Exception Patterns in Lua, Lua Workshop 2006] by JohnBelmonte
"Chapter 13: Exceptions in Lua" in Lua Programming Gems (see LuaBooks) by JohnBelmonte identifies limitations in the language, implements a simple try/catch function, describes issues using (non-string) error objects, and implements a D-like scope manager (alternative to try/catch).
FinalizedExceptions - discusses an exception scheme with protect and newtry functions
CatchingLuaExceptions - a set of patches that facilitate lua exception handling in C and C++
LuaAndExceptionsHackingNotes
ErrorHandlingBetweenLuaAndCplusplus - issues in mixing Lua with C++ rather than C
LuaCarp - Perl Carp implemented in Lua (handle error level transparently)
ResourceAcquisitionIsInitialization - automatically releasing acquired resources on scope exit, RAII
ResumableVmPatch - supporting yield across a pcall (see also FeatureProposals)

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Edited January 14, 2011 3:48 am GMT (diff)