From f008fc38edc090408a141a34fc66b1dcbe06d224 Mon Sep 17 00:00:00 2001
From: Koji Takami <vzg03566@gmail.com>
Date: Sat, 23 Jan 2021 14:06:07 +0900
Subject: [PATCH] Modify to pass tests with nodejs 10 as well

---
 sample/calc.js        | 4 ++--
 test/language.test.js | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/sample/calc.js b/sample/calc.js
index 0a3c8b8..e3777f4 100644
--- a/sample/calc.js
+++ b/sample/calc.js
@@ -21,7 +21,7 @@ const calc = new Language([
          */
         (term) => {
             // get no whitespace tokens
-            const terms = term.contents().flat();
+            const terms = [].concat(...term.contents());
             let acc = terms[0];
             for(let i = 1; i < terms.length; i += 2) {
                 const ope = terms[i];
@@ -48,7 +48,7 @@ const calc = new Language([
             ["unary-expression", "multiplicative-expression-rest*"],
         ],
         (term) => {
-            const terms = term.contents().flat();
+            const terms = [].concat(...term.contents());
             let acc = terms[0];
             for(let i = 1; i < terms.length; i += 2) {
                 const ope = terms[i];
diff --git a/test/language.test.js b/test/language.test.js
index 9d7cdf6..f34f7d6 100644
--- a/test/language.test.js
+++ b/test/language.test.js
@@ -68,7 +68,7 @@ describe("Language", () => {
                             [["integer-constant", "additive-expression-rest*"]],
                             (term) => {
                                 debug(`additive-expression.term: ${JSON.stringify(term, null, 2)}`);
-                                const terms = term.contents().flat();
+                                const terms = [].concat(...term.contents());
                                 debug(`additive-expression.terms: ${JSON.stringify(terms, null, 2)}`);
                                 let acc = terms[0];
                                 for(let i = 1; i < terms.length; i += 2) {