lua_concat
[-n, +1, e]
void lua_concat (lua_State *L, int n);
Concatenates the n
values at the top of the stack, pops them, and leaves the result at the top. If n
is 1, the result is the single value on the stack (that is, the function does nothing); if n
is 0, the result is the empty string. Concatenation is performed following the usual semantics of Lua (see §3.4.6).
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