LUA源码阅读顺序

LUA源码阅读顺序 - [LUA]
版权声明：转载时请以超链接形式标明文章原始出处和作者信息及本声明
http://cjbskysea.blogbus.com/logs/74215893.html



转自：http://www.reddit.com/comments/63hth/ask_reddit_which_oss_codebases_out_there_are_so/c02pxbp

Recommended reading order:

    * lmathlib.c, lstrlib.c: get familiar with the external C API. Don't bother with the pattern matcher though. Just the easy functions.
    * lapi.c: Check how the API is implemented internally. Only skim this to get a feeling for the code. Cross-reference to lua.h and luaconf.h as needed.
    * lobject.h: tagged values and object representation. skim through this first. you'll want to keep a window with this file open all the time.
    * lstate.h: state objects. ditto.
    * lopcodes.h: bytecode instruction format and opcode definitions. easy.
    * lvm.c: scroll down to luaV_execute, the main interpreter loop. see how all of the instructions are implemented. skip the details for now. reread later.
    * ldo.c: calls, stacks, exceptions, coroutines. tough read.
    * lstring.c: string interning. cute, huh?
    * ltable.c: hash tables and arrays. tricky code.
    * ltm.c: metamethod handling, reread all of lvm.c now.
    * You may want to reread lapi.c now.
    * ldebug.c: surprise waiting for you. abstract interpretation is used to find object names for tracebacks. does bytecode verification, too.
    * lparser.c, lcode.c: recursive descent parser, targetting a register-based VM. start from chunk() and work your way through. read the expression parser and the code generator parts last.
    * lgc.c: incremental garbage collector. take your time.
    * Read all the other files as you see references to them. Don't let your stack get too deep though.

If you're done before X-Mas and understood all of it, you're good. The information density of the code is rather high.