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

src/utils/ast/ast_if.h

@@ -0,0 +1,32 @@
+#ifndef AST_IF_H
+#define AST_IF_H
+
+#include <stdbool.h>
+
+#include "utils/ast/ast.h"
+
+struct ast_if
+{
+    struct ast *condition;
+    struct ast *then_clause;
+    struct ast *else_clause;
+};
+
+/**
+ * Checks if the given AST node is an if statement.
+ */
+bool ast_is_if(struct ast *node);
+
+/**
+ * Retrieves the if statement data from the given AST node.
+ * Assumes that the node is of type AST_IF.
+ */
+struct ast_if *ast_get_if(struct ast *node);
+
+/**
+ * Creates a new AST node representing an if statement.
+ */
+struct ast *ast_create_if(struct ast *condition, struct ast *then_clause,
+                          struct ast *else_clause);
+
+#endif /* ! AST_IF_H */