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We add a suffix to let us publish a Lua foo() function that wraps a C++ foo()
function. Of course the lua_CFunction must accept lua_State* and extract its
parameters from the Lua stack, so it must invoke different C++ code than the
C++ foo() function it's trying to reach. So the lua_CFunction is a method of
the LuaFunction subclass instance named foo_lua.
The suffix was _luadecl, but since the class name shows up in log messages,
make it the more streamlined _lua instead.
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Extend the LuaFunction::Registry map to store helptext as well as the function
pointer.
Add help text to every existing lua_function() invocation.
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macOS clang produces fatal warnings when trying to pass a const char*
parameter to luaL_error() (-Wformat-security). Temporarily suppressing that
requires #pragma clang directives which, in turn, produce fatal warnings in
VS.
Moreover, VS recognizes that luaL_error() never returns, and so diagnoses the
following return statement as unreachable code. But that return statement is
the whole reason for lluau::error()'s existence...
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Add LuaState::expr() that evaluates a Lua snippet and reports back any result
(or error) left on the stack.
Add LLLUAmanager::runScriptFile() and runScriptLine() overloads that accept a
callback with an (int count, LLSD result) signature. The count disambiguates
(error, no result, one result, array of results). Also add overloads that accept
an existing LuaState instance. Also add waitScriptFile() and waitScriptLine()
methods that pause the calling coroutine until the Lua script completes, and
return its results.
Instead of giving LuaState a description to use for all subsequent checkLua()
calls, remove description from its constructor and data members. Move to
expr() and checkLua() parameters: we want a description specific to each
operation, rather than for the LuaState as a whole. This prepares for
persistent LuaState instances.
For now, the existing script_finished_fn semantics remain: the callback will
be called only when the LuaState is destroyed. This may need to change as we
migrate towards longer-lasting LuaState instances.
Make lua_function(name) macro append suffixes to the name for both the
LuaFunction subclass declaration and the instance declaration. This allows
publishing a lua_function() name such as sleep(), which already has a
different C++ declaration.
Move the Lua sleep() entry point to a standalone lua_function(sleep), instead
of a lambda in the body of runScriptFile().
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The intention is to decentralize Luau entry points into our C++ code,
permitting a given entry point to be added to the .cpp file that already deals
with that class or functional area. Continuing to add every such entry point
to llluamanager.cpp doesn't scale well.
Extract LuaListener class from llluamanager.cpp to its own header and .cpp
file.
Extract from llluamanager into lua_function.h (and .cpp) declarations useful
for adding a lua_function Luau entry point, e.g.:
lua_register()
lua_rawlen()
lua_tostdstring()
lua_pushstdstring()
lua_tollsd()
lua_pushllsd()
LuaPopper
lua_function() and LuaFunction class
LuaState
lua_what
lua_stack
DebugExit
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