feat: implement extern block reading and parsing

include/compiler/fzl_parser.h

@@ -8,17 +8,31 @@
 // AST node type
 typedef enum
 {
+  FZL_NODETYPE_TYPEDEF,
+  FZL_NODETYPE_HANDLE,
+  FZL_NODETYPE_ALIAS,
+  FZL_NODETYPE_STRUCT,
+  FZL_NODETYPE_REFERENCE,
+  FZL_NODETYPE_EXTERN_FN,
+
+  FZL_NODETYPE_EXTERN,
   FZL_NODETYPE_BLOCK,
-  FZL_NODETYPE_CALL,
+
   FZL_NODETYPE_LITERAL,
   FZL_NODETYPE_FMT_STRING,
+
   FZL_NODETYPE_IDENTIFIER,
+
   FZL_NODETYPE_CONDITIONAL,
+
   FZL_NODETYPE_FUNCTION,
   FZL_NODETYPE_RETURN,
+  FZL_NODETYPE_CALL,
+
   FZL_NODETYPE_CLASS,
   FZL_NODETYPE_FIELD,
   FZL_NODETYPE_CONSTRUCT,
+
   FZL_NODETYPE_LOOP,
   FZL_NODETYPE_BREAK,
 
@@ -153,6 +167,46 @@ typedef struct fzl_node
 
       struct fzl_node *body;
     } loop;
+
+    // Extern library
+    struct
+    {
+      char *libname;
+
+      struct fzl_node **typedefs;
+      size_t typedefs_count;
+
+      struct fzl_node **fns;
+      size_t fns_count;
+    } ext;
+
+    // Type definition
+    struct
+    {
+      char *typename;
+      struct fzl_node *type;
+    } typedefinition;
+
+    // Structure
+    struct
+    {
+      char *original_name;
+
+      struct fzl_node **entries;
+      size_t entries_count;
+    } structure;
+
+    // External function
+    struct
+    {
+      char *name;
+      char *original_name;
+
+      fzl_token_t *type;
+
+      struct fzl_node **args;
+      size_t args_count;
+    } ext_fn;
   };
 } fzl_node_t;
 

include/compiler/internals/parser.h

@@ -29,6 +29,11 @@ fzl_node_t *pa_new(fzl_parser_t *parser);
 fzl_node_t *pa_assignment(fzl_parser_t *parser);
 fzl_node_t *pa_expression(fzl_parser_t *parser);
 
+fzl_node_t *pa_struct(fzl_parser_t *parser);
+fzl_node_t *pa_ref(fzl_parser_t *parser);
+fzl_node_t *pa_typedef(fzl_parser_t *parser);
+fzl_node_t *pa_externfn(fzl_parser_t *parser);
+
 fzl_node_t *pa_class(fzl_parser_t *parser);
 fzl_node_t *pa_function(fzl_parser_t *parser);
 fzl_node_t *pa_return(fzl_parser_t *parser);
@@ -38,6 +43,7 @@ fzl_node_t *pa_for(fzl_parser_t *parser);
 fzl_node_t *pa_while(fzl_parser_t *parser);
 fzl_node_t *pa_loop(fzl_parser_t *parser);
 fzl_node_t *pa_break(fzl_parser_t *parser);
+fzl_node_t *pa_extern(fzl_parser_t *parser);
 
 fzl_node_t *pa_statement(fzl_parser_t *parser);
 fzl_node_t *pa_program(fzl_parser_t *parser);