Add core library and element classes for Basalt framework

src/libraries/expect.lua

@@ -0,0 +1,35 @@
+local errorManager = require("errorManager")
+
+-- Simple type checking without stack traces
+local function expect(position, value, expectedType)
+    local valueType = type(value)
+
+    if expectedType == "element" then
+        if valueType == "table" and value.get("type") ~= nil then
+            return true
+        end
+    end
+
+    if expectedType == "color" then
+        if valueType == "number" and value >= 1 and value <= 32768 then
+            return true
+        end
+        if valueType == "string" and colors[value] then
+            return true
+        end
+    end
+
+    if valueType ~= expectedType then
+        errorManager.header = "Basalt Type Error"
+        errorManager.error(string.format(
+            "Bad argument #%d: expected %s, got %s",
+            position,
+            expectedType,
+            valueType
+        ))
+    end
+
+    return true
+end
+
+return expect