49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
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#define SOL_ALL_SAFETIES_ON 1
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#include <sol/sol.hpp>
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int main(int, char*[]) {
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sol::state lua;
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lua.script("function func (a, b) return (a + b) * 2 end");
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sol::reference func_ref = lua["func"];
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// maybe this is in a lua_CFunction you bind,
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// or maybe you're trying to work with a pre-existing system
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// maybe you've used a custom lua_load call, or you're
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// working with state_view's load(lua_Reader, ...) call...
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// here's a little bit of how you can work with the stack
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lua_State* L = lua.lua_state();
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// this is a handler:
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// stack_aligned_stack_handler,
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// as its type name explains so verbosely,
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// expects the handler on the stack
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sol::stack_reference traceback_handler(L,
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-sol::stack::push(
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L, sol::default_traceback_error_handler));
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// then, you need the function
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// to be on the stack
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func_ref.push();
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sol::stack_aligned_stack_handler_function func(
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L, -1, traceback_handler);
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lua_pushinteger(L, 5); // argument 1, using plain API
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lua_pushinteger(L, 6); // argument 2
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// take 2 arguments from the top,
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// and use "stack_aligned_function" to call
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int result = func(sol::stack_count(2));
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// function call pops function and arguments,
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// leaves result on the stack for us
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// but we must manually clean the traceback handler
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// manually pop traceback handler
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traceback_handler.pop();
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// make sure everything is clean
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SOL_ASSERT(result == 22);
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SOL_ASSERT(
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lua.stack_top() == 0); // stack is empty/balanced
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return 0;
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}
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