1 files changed, 9 insertions, 0 deletions
diff --git a/src/runtime/c/pgf/expr.h b/src/runtime/c/pgf/expr.h
index 2c960ac92..59af969ec 100644
--- a/src/runtime/c/pgf/expr.h
+++ b/src/runtime/c/pgf/expr.h
@@ -233,6 +233,15 @@ PGF_API_DECL void
 pgf_print_expr_tuple(size_t n_exprs, PgfExpr exprs[], PgfPrintContext* ctxt,
                      GuOut* out, GuExn* err);
 
+PGF_API PgfLiteral
+pgf_clone_literal(PgfLiteral lit, GuPool* pool);
+
+PGF_API PgfExpr
+pgf_clone_expr(PgfExpr expr, GuPool* pool);
+
+PGF_API PgfType*
+pgf_clone_type(PgfType* type, GuPool* pool);
+
 PGF_API_DECL prob_t
 pgf_compute_tree_probability(PgfPGF *gr, PgfExpr expr);