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# LPeg - Parsing Expression Grammars For Lua
For more information,
see [Lpeg](//www.inf.puc-rio.br/~roberto/lpeg/).
Vendored @ v1.1.0 with patch to prevent conflict with LuaJIT extensions:
```diff
diff --git a/src/lpeg/lptree.c b/src/lpeg/lptree.c
index 475b0c36bf..94a3171d5a 100644
--- a/src/lpeg/lptree.c
+++ b/src/lpeg/lptree.c
@@ -1388,7 +1388,7 @@ int luaopen_lpeg (lua_State *L) {
lua_pushnumber(L, MAXBACK); /* initialize maximum backtracking */
lua_setfield(L, LUA_REGISTRYINDEX, MAXSTACKIDX);
luaL_setfuncs(L, metareg, 0);
- luaL_newlib(L, pattreg);
+ luaL_register(L, "lpeg", pattreg); // Nvim: inline conflicting luaL_newlib macro
lua_pushvalue(L, -1);
lua_setfield(L, -3, "__index");
lua_pushliteral(L, "LPeg " VERSION);
diff --git a/src/lpeg/lptypes.h b/src/lpeg/lptypes.h
index 3f860b973f..98974e1b88 100644
--- a/src/lpeg/lptypes.h
+++ b/src/lpeg/lptypes.h
@@ -35,7 +35,7 @@
#define lua_rawlen lua_objlen
#define luaL_setfuncs(L,f,n) luaL_register(L,NULL,f)
-#define luaL_newlib(L,f) luaL_register(L,"lpeg",f)
+// #define luaL_newlib(L,f) luaL_register(L,"lpeg",f) // Nvim: conflicts with LuaJIT
typedef size_t lua_Unsigned;
```
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