@@ -87,6 +87,6 @@ |
||
87 | 87 | */ |
88 | 88 | public function __toString(): string |
89 | 89 | { |
90 | - return "(" . $this->sourceVertex + " : " + $this->targetVertex + ")"; |
|
90 | + return "(" . $this->sourceVertex + " : " +$this->targetVertex + ")"; |
|
91 | 91 | } |
92 | 92 | } |
@@ -207,7 +207,7 @@ |
||
207 | 207 | } elseif ($vertex->equals($target)) { |
208 | 208 | return $source; |
209 | 209 | } else { |
210 | - throw new InvalidArgumentException("no such vertex: " + $vertex); |
|
210 | + throw new InvalidArgumentException("no such vertex: " +$vertex); |
|
211 | 211 | } |
212 | 212 | } |
213 | 213 |