refactor lua libraries

src/logic/scripting/lua/libvecn.cpp

@@ -6,10 +6,7 @@
 
 template<int n, template<class> class Op>
 static int l_binop(lua::State* L) {
-    uint argc = lua::gettop(L);
-    if (argc != 2 && argc != 3) {
-        throw std::runtime_error("invalid arguments number (2 or 3 expected)");
-    }
+    uint argc = lua::check_argc(L, 2, 3);
     auto a = lua::tovec<n>(L, 1);
 
     if (lua::isnumber(L, 2)) { // scalar second operand overload
@@ -43,7 +40,7 @@ static int l_binop(lua::State* L) {
 
 template<int n, glm::vec<n, float>(*func)(const glm::vec<n, float>&)>
 static int l_unaryop(lua::State* L) {
-    uint argc = lua::gettop(L);
+    uint argc = lua::check_argc(L, 1, 2);
     auto vec = func(lua::tovec<n>(L, 1));
     switch (argc) {
         case 1:
@@ -55,27 +52,20 @@ static int l_unaryop(lua::State* L) {
             return 1;
         case 2:
             return lua::setvec(L, 2, vec);
-        default: {
-            throw std::runtime_error("invalid arguments number (1 or 2 expected)");
-        }
     }
+    return 0;
 }
 
 template<int n, float(*func)(const glm::vec<n, float>&)>
 static int l_scalar_op(lua::State* L) {
+    lua::check_argc(L, 1);
     auto vec = lua::tovec<n>(L, 1);
-    if (lua::gettop(L) != 1) {
-        throw std::runtime_error("invalid arguments number (1 expected)");
-    }
     return lua::pushnumber(L, func(vec));
 }
 
 template<int n>
 static int l_pow(lua::State* L) {
-    uint argc = lua::gettop(L);
-    if (argc != 2 && argc != 3) {
-        throw std::runtime_error("invalid arguments number (2 or 3 expected)");
-    }
+    uint argc = lua::check_argc(L, 2, 3);
     auto a = lua::tovec<n>(L, 1);
 
     if (lua::isnumber(L, 2)) { 
@@ -107,10 +97,7 @@ static int l_pow(lua::State* L) {
 
 template<int n>
 static int l_dot(lua::State* L) {
-    uint argc = lua::gettop(L);
-    if (argc != 1) {
-        throw std::runtime_error("invalid arguments number (1 expected)");
-    }
+    lua::check_argc(L, 2);
     const auto& a = lua::tovec<n>(L, 1);
     const auto& b = lua::tovec<n>(L, 2);
     return lua::pushnumber(L, glm::dot(a, b));
@@ -118,7 +105,7 @@ static int l_dot(lua::State* L) {
 
 template<int n>
 static int l_inverse(lua::State* L) {
-    uint argc = lua::gettop(L);
+    uint argc = lua::check_argc(L, 1, 2);
     auto vec = lua::tovec<n>(L, 1);
     switch (argc) {
         case 1:
@@ -130,31 +117,26 @@ static int l_inverse(lua::State* L) {
             return 1;
         case 2:
             return lua::setvec(L, 2, -vec);
-        default: {
-            throw std::runtime_error("invalid arguments number (1 or 2 expected)");
-        }
     }
+    return 0;
 }
 
 static int l_spherical_rand(lua::State* L) {
-    int argc = lua::gettop(L);
+    uint argc = lua::check_argc(L, 1, 2);
     switch (argc) {
         case 1:
             return lua::pushvec3(L, glm::sphericalRand(lua::tonumber(L, 1)));
         case 2:
             return lua::setvec(L, 2, 
                 glm::sphericalRand(static_cast<float>(lua::tonumber(L, 1))));
-        default:
-            throw std::runtime_error("invalid arguments number (1 or 2 expected)");
     }
+    return 0;
 }
 
 template<int n>
 static int l_tostring(lua::State* L) {
+    lua::check_argc(L, 1);
     auto vec = lua::tovec<n>(L, 1);
-    if (lua::gettop(L) != 1) {
-        throw std::runtime_error("invalid arguments number (1 expected)");
-    }
     std::stringstream ss;
     ss << "vec" << std::to_string(n) << "{";
     for (int i = 0; i < n; i++) {