From 68898b4327595dfec216ed523208f5d3ea736aa7 Mon Sep 17 00:00:00 2001
From: Pavel Shevaev <pacha.shevaev@gmail.com>
Date: Tue, 23 May 2023 13:38:16 +0300
Subject: [PATCH] Adding initial support for 'implements' and interfaces

---
 metagen.inc.php | 15 ++++++++++++++-
 parser.inc.php  | 30 ++++++++++++++++++++++--------
 2 files changed, 36 insertions(+), 9 deletions(-)

diff --git a/metagen.inc.php b/metagen.inc.php
index 6e05614..993e77d 100644
--- a/metagen.inc.php
+++ b/metagen.inc.php
@@ -172,14 +172,16 @@ class mtgMetaStruct extends mtgUserType
   protected $fields = array();
   protected $funcs = array();
   protected $parent = null;
+  protected $implements = array();
 
-  function __construct($name, $fields = array(), mtgTypeRef $parent = null, $tokens = array())
+  function __construct($name, array $fields = array(), mtgTypeRef $parent = null, array $tokens = array(), array $implements = array())
   {
     parent::__construct($name);
 
     $this->setFields($fields);
     $this->parent = $parent;
     $this->tokens = $tokens;
+    $this->implements = $implements;
   }
 
   function getParent()
@@ -187,6 +189,17 @@ class mtgMetaStruct extends mtgUserType
     return $this->parent ? $this->parent->resolve() : null;
   }
 
+  function getImplements()
+  {
+    if(!$this->implements)
+      return array();
+
+    $imps = array();
+    foreach($this->implements as $imp)
+      $imps[] = $imp->resolve();
+    return $imps;
+  }
+
   function getFields()
   {
     return $this->fields;
diff --git a/parser.inc.php b/parser.inc.php
index 307c8cf..077b880 100644
--- a/parser.inc.php
+++ b/parser.inc.php
@@ -29,6 +29,7 @@ class mtgMetaInfoParser
   const T_Func               = 1012;
   const T_RawStringConstant  = 1013;
   const T_Interface          = 1014;
+  const T_Implements         = 1015;
   const T_string             = 1020;
   const T_uint32             = 1021;
   const T_int32              = 1022;
@@ -77,6 +78,7 @@ class mtgMetaInfoParser
     $this->token_strs[self::T_Interface] = '<interface>';
     $this->token_strs[self::T_Prop] = '<@prop>';
     $this->token_strs[self::T_Extends] = '<extends>';
+    $this->token_strs[self::T_Implements] = '<implements>';
     $this->token_strs[self::T_Func] = '<func>';
   }
 
@@ -463,7 +465,18 @@ class mtgMetaInfoParser
       $parent = new mtgTypeRef($parent_name, $this->current_meta, $this->file, $this->line);
     }
 
-    $s = new mtgMetaStruct($name, array(), $parent);
+    $implements = array();
+    if($this->token == self::T_Implements)
+    {
+      do 
+      {
+        $this->_next();
+        $if_name = $this->_checkThenNext(self::T_Identifier);
+        $implements[] = new mtgTypeRef($if_name, $this->current_meta, $this->file, $this->line);
+      } while($this->token == ord(','));
+    }
+
+    $s = new mtgMetaStruct($name, array(), $parent, array(), $implements);
     $this->current_meta->addUnit(new mtgMetaInfoUnit($this->file, $s));
 
     if($this->token == self::T_Prop)
@@ -726,13 +739,14 @@ class mtgMetaInfoParser
             }
 
             //check for declaration keywords:
-            if($this->attribute == "struct")    { $this->token = self::T_Struct;    return; }
-            if($this->attribute == "interface") { $this->token = self::T_Interface; return; }
-            if($this->attribute == "enum")      { $this->token = self::T_Enum;      return; }
-            if($this->attribute == "RPC")       { $this->token = self::T_RPC;       return; }
-            if($this->attribute == "end")       { $this->token = self::T_End;       return; }
-            if($this->attribute == "extends")   { $this->token = self::T_Extends;   return; }
-            if($this->attribute == "func")      { $this->token = self::T_Func;      return; }
+            if($this->attribute == "struct")      { $this->token = self::T_Struct;     return; }
+            if($this->attribute == "interface")   { $this->token = self::T_Interface;  return; }
+            if($this->attribute == "enum")        { $this->token = self::T_Enum;       return; }
+            if($this->attribute == "RPC")         { $this->token = self::T_RPC;        return; }
+            if($this->attribute == "end")         { $this->token = self::T_End;        return; }
+            if($this->attribute == "extends")     { $this->token = self::T_Extends;    return; }
+            if($this->attribute == "implements")  { $this->token = self::T_Implements; return; }
+            if($this->attribute == "func")        { $this->token = self::T_Func;       return; }
 
             //if not it's a user defined identifier
             $this->token = self::T_Identifier;