lua_tonumberx

lua_tonumberx[-0, +0, –]

lua_Number lua_tonumberx (lua_State *L, int index, int *isnum);

Converts the Lua value at the given index to the C type lua_Number (see lua_Number). The Lua value must be a number or a string convertible to a number (see §3.4.3); otherwise, lua_tonumberx returns 0.

If isnum is not NULL, its referent is assigned a boolean value that indicates whether the operation succeeded.

Links:

https://www.lua.org/manual/5.3/manual.html#lua_tonumberx

doc_lua

2017-02-21 04:14:42

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