Implemented struct pointer types

src/errors/Common.go

@@ -1,6 +1,7 @@
 package errors
 
 var (
+	CouldNotInferType          = &Base{"Couldn't infer type"}
 	EmptySwitch                = &Base{"Empty switch"}
 	ExpectedFunctionName       = &Base{"Expected function name"}
 	ExpectedFunctionParameters = &Base{"Expected function parameters"}
@@ -21,5 +22,4 @@ var (
 	MissingParameter           = &Base{"Missing parameter"}
 	MissingType                = &Base{"Missing type"}
 	NotImplemented             = &Base{"Not implemented"}
-	UnknownType                = &Base{"Unknown type"}
 )

src/errors/UnknownType.go

@@ -0,0 +1,18 @@
+package errors
+
+import "fmt"
+
+// UnknownType represents unknown types.
+type UnknownType struct {
+	Name        string
+	CorrectName string
+}
+
+// Error generates the string representation.
+func (err *UnknownType) Error() string {
+	if err.CorrectName != "" {
+		return fmt.Sprintf("Unknown type '%s', did you mean '%s'?", err.Name, err.CorrectName)
+	}
+
+	return fmt.Sprintf("Unknown type '%s'", err.Name)
+}