From ec7dc3a28a5a6289595fab7140bd357c4cca8f3e Mon Sep 17 00:00:00 2001
From: Lewis Van Winkle <lv@codeplea.com>
Date: Mon, 22 Aug 2016 19:09:21 -0500
Subject: [PATCH] Allow whitespace at end of expression.

---
 test.c     |  1 +
 tinyexpr.c | 10 +++++-----
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/test.c b/test.c
index e840525..59941f0 100644
--- a/test.c
+++ b/test.c
@@ -38,6 +38,7 @@ typedef struct {
 void test_results() {
     test_case cases[] = {
         {"1", 1},
+        {"1 ", 1},
         {"(1)", 1},
 
         {"pi", 3.14159},
diff --git a/tinyexpr.c b/tinyexpr.c
index 048436f..d544ad3 100644
--- a/tinyexpr.c
+++ b/tinyexpr.c
@@ -172,13 +172,13 @@ static double comma(double a, double b) {return b;}
 void next_token(state *s) {
     s->type = TOK_NULL;
 
-    if (!*s->next){
-        s->type = TOK_END;
-        return;
-    }
-
     do {
 
+        if (!*s->next){
+            s->type = TOK_END;
+            return;
+        }
+
         /* Try reading a number. */
         if ((s->next[0] >= '0' && s->next[0] <= '9') || s->next[0] == '.') {
             s->value = strtod(s->next, (char**)&s->next);