refactor(ast): one file per ast_type -- UNSTABLE (2)

src/utils/ast/ast_if.c

@@ -0,0 +1,32 @@
+#include "utils/ast/ast_if.h"
+
+#include <stdlib.h>
+#include <assert.h>
+#include <stdbool.h>
+
+struct ast *ast_create_if(struct ast *condition, struct ast *then_clause,
+                          struct ast *else_clause)
+{
+    struct ast_if *if_data = malloc(sizeof(struct ast_if));
+    if (!if_data)
+        return NULL;
+
+    if_data->condition = condition;
+    if_data->then_clause = then_clause;
+    if_data->else_clause = else_clause;
+
+    return ast_create(AST_IF, if_data);
+}
+
+struct ast_if *ast_get_if(struct ast *node)
+{
+    assert(node != NULL);
+    assert(node->type == AST_IF);
+    return (struct ast_if *)node->data;
+}
+
+bool ast_is_if(struct ast *node)
+{
+    assert(node != NULL);
+    return node->type == AST_IF;
+}