Fixed [error] Cannot pass a value of type (::Symbol | nil) as an argument of type (:ref | :array | nil)

```
lib/ruby_header_parser/parser.rb:289:8: [error] Cannot pass a value of type `(::Symbol | nil)` as an argument of type `(:ref | :array | nil)`
│   (::Symbol | nil) <: (:ref | :array | nil)
│     ::Symbol <: (:ref | :array | nil)
│       ::Symbol <: :ref
│
│ Diagnostic ID: Ruby::ArgumentTypeMismatch
│
└         pointer:,
          ~~~~~~~
```

Author: sue445

lib/ruby_header_parser/parser.rb

@@ -329,21 +329,24 @@ def analyze_argument_type(function_name:, arg_pos:, parts:)
     #   - pointer [Symbol,nil]
     #   - length [Integer]
     def prepare_argument_parts(parts:, arg_pos:)
-      pointer = nil
-      length = 0
-
       if parts[-1] =~ /\[([0-9]+)?\]$/
         parts[-1].gsub!(/\[([0-9]+)?\]$/, "")
         length = ::Regexp.last_match(1).to_i
-        pointer = :array
+
+        unless parts[-1] =~ /^[0-9a-zA-Z_]+$/
+          # last elements isn't dummy argument
+          parts << "arg#{arg_pos}"
+        end
+
+        return [:array, length]
       end
 
       unless parts[-1] =~ /^[0-9a-zA-Z_]+$/
         # last elements isn't dummy argument
         parts << "arg#{arg_pos}"
       end
 
-      [pointer, length]
+      [nil, 0]
     end
 
     # @param type [String]

sig/ruby_header_parser/argument_definition.rbs

@@ -5,7 +5,7 @@ module RubyHeaderParser
     attr_accessor pointer: :ref | :array | nil
     attr_accessor length: Integer
 
-    def initialize: (type: String, name: String, pointer: (:ref | :array)?, ?length: Integer) -> void
+    def initialize: (type: String, name: String, pointer: (:ref | :array | :ref_array | :function | :sref | :str_array | :in_ref)?, ?length: Integer) -> void
 
     def ==: (untyped other) -> bool
 

sig/ruby_header_parser/parser.rbs

@@ -68,12 +68,12 @@ module RubyHeaderParser
         function_name: String,
         arg_pos: Integer,
         parts: Array[String]
-      ) -> [String, Symbol?, Integer]
+      ) -> [String, (:ref | :array | :ref_array | :function | :sref | :str_array | :in_ref)?, Integer]
 
     def prepare_argument_parts: (
         parts: Array[String],
         arg_pos: Integer
-      ) -> [Symbol?, Integer]
+      ) -> [(:array)?, Integer]
 
     def pointer_length: (String) -> Integer
   end