Compare to empty string (#39)

Author: trobro

src/HJSON/HJSONParser.php

@@ -171,7 +171,7 @@ private function _array()
         $this->white();
         if ($kw !== null) {
             $c = $this->getComment($wat);
-            if (trim($c)) {
+            if (trim($c) !== '') {
                 $kw[] = $c;
             }
         }
@@ -193,7 +193,7 @@ private function _array()
             }
             if ($kw !== null) {
                 $c = $this->getComment($wat);
-                if (trim($c)) {
+                if (trim($c) !== '') {
                     $kw[] = $c;
                 }
             }
@@ -276,7 +276,7 @@ private function object($withoutBraces = false)
     private function pushWhite($key, &$kw, $wat)
     {
         $kw->c->$key = $this->getComment($wat);
-        if (trim($key)) {
+        if (trim($key) !== '') {
             $kw->o[] = $key;
         }
     }
@@ -348,7 +348,7 @@ private function next($c = false)
     {
         // If a c parameter is provided, verify that it matches the current character.
 
-        if ($c && $c !== $this->ch) {
+        if ($c !== false && $c !== $this->ch) {
             $this->error("Expected '$c' instead of '{$this->ch}'");
         }
 

src/HJSON/HJSONStringifier.php

@@ -168,7 +168,7 @@ private function mlString($string, $gap)
             $res = $this->eol . $gap . "'''";
             for ($i = 0; $i < count($a); $i++) {
                 $res .= $this->eol;
-                if ($a[$i]) {
+                if ($a[$i] !== '') {
                     $res .= $gap . $a[$i];
                 }
             }
@@ -178,7 +178,7 @@ private function mlString($string, $gap)
 
     private function quoteName($name)
     {
-        if (!$name) {
+        if ($name === '') {
             return '""';
         }
 
@@ -202,7 +202,7 @@ private function str($value, $hasComment = null, $noIndent = null, $isRootObject
             return $str && !$startsWithNL($str);
         };
         $wsc = function ($str) {
-            if (!$str) {
+            if ($str === '') {
                 return "";
             }
             for ($i = 0; $i < mb_strlen($str); $i++) {

tests/assets/strings_result.hjson

@@ -30,6 +30,11 @@
     '''
   multiline4: ←→±≠Я
   multiline5: åäö
+  multiline6:
+    '''
+    bar
+    0
+    '''
   foo1a: asdf\"'a\s\w
   foo1b: asdf\"'a\s\w
   foo1c: asdf\"'a\s\w

tests/assets/strings_result.json

@@ -14,6 +14,7 @@
   "multiline3": "first line\n  indented line\nlast line\n",
   "multiline4": "←→±≠Я",
   "multiline5": "åäö",
+  "multiline6": "bar\n0",
   "foo1a": "asdf\\\"'a\\s\\w",
   "foo1b": "asdf\\\"'a\\s\\w",
   "foo1c": "asdf\\\"'a\\s\\w",

tests/assets/strings_test.hjson

@@ -47,6 +47,8 @@
     åäö
     '''
 
+  multiline6: "bar\n0"
+
   # escapes/no escape
 
   foo1a: asdf\"'a\s\w