Embedding Lua in C++ #7 - Using Native Types in Lua

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These videos describe how to embed Lua into a native application and interface with the Lua C API. They do not cover how to use the scripting language itself.

The stub project for these videos is available here.

The tutorial is on Windows and using CMake and Visual Studio, but you could build this code on pretty much any platform.

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This is fantastic. Thank you for putting this up. Important to note that getglobal pushes the user data onto the stack and if this call to getglobal was inadvertently inside a loop without calling lua_pop(L, 1); at the end of each iteration it would cause a stack overflow. my2c

DamianReloaded

6:00 this is not how i would create userdatas
what i would do is this

Sprite* spr = new Sprite();
lua_pushlightuserdata(L, spr);

reason i'd do it like this is because userdatas get gced if they go out of scope like you said(ive had this happen before and almost pulled my hair out)
so if you want to save it and use it for later u advise u to use this method ^^

uhnoyearsago

I'm far from an accomplished C++ programmer - but the combination of C++17 lambda syntax with C-style (casts) looks odd to me. Is there a particular reason to use them rather than, say, `static_cast<Sprite*>(…)`?

It's an academic point though - thanks for the series!

RoamingAdhocrat

I just found out in D that `int delegate(lua_State *L)`s crash the program so I'm going to have to write my own scripting language somehow.

ismailAx

Embedding Lua in C++ #7 - Using Native Types in Lua

Embedding Lua in C++ #7 - Using Native Types in Lua

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Embedding Lua in C++ #14 - User Values

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Embedding Lua in C++ #4 - Calling A Lua Function From C

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Embedding Lua in C++ #15 - Memory Allocation

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Embedding Lua in C++ #6 - Calling Native Functions From Lua

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Embedding Lua in C++ #13 - Writing Object Properties

Embedding Lua in C++ #24 - Passing Parameters Using Run Time Type Information

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Embedding Lua in C++ #25 - Return Values Using Run Time Type Information

Embedding Lua in C++ #20 - Upvalues & Light Userdata

Embedding Lua in C++ #31 - Handling User Values Using Run Time Type Information

Embedding Lua in C++ #17 - Aligned Memory Allocation

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Embedding Lua in C++ #12 - Reading Object Properties

Embedding Lua in C++ #26 - Creating Native Objects Using Run Time Type Information

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