refactor(ast): one file per ast_type -- FINISHED

src/utils/ast/ast.h

@@ -1,32 +1,12 @@
 #ifndef AST_H
 #define AST_H
 
+#include "utils/ast/ast_base.h"
 #include "utils/ast/ast_command.h"
 #include "utils/ast/ast_if.h"
 #include "utils/ast/ast_list.h"
 #include "utils/ast/ast_void.h"
 
-enum ast_type
-{
-    AST_END,
-    AST_LIST,
-    AST_IF,
-    AST_CMD
-};
-
-struct ast
-{
-    enum ast_type type;
-
-    /**
-     * Data associated with this AST node. It can be one of the following:
-     * - NULL (AST_END)
-     * - struct ast_if* (AST_IF)
-     * - struct ast_cmd* (AST_CMD)
-     */
-    void *data;
-};
-
 /* @brief: returns an ast* with corresponding data and type.
  *
  * @note: this function should only be called by ast_create_[TYPE] functions.
@@ -36,6 +16,6 @@ struct ast *ast_create(enum ast_type type, void *data);
 /* @brief: frees the given ast. If ast is NULL, does nothing.
  *
  */
-void ast_free(struct ast *node)
+void ast_free(struct ast *node);
 
 #endif /* ! AST_H */