Prevent accidental bool conversion of AutoCloseFd.

6f97afa7 · Morten Hustveit · bf015f61 · 6f97afa7
Commit 6f97afa7 authored Jan 05, 2015 by Morten Hustveit
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io.h c++/src/kj/io.h +4 -0

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--- a/c++/src/kj/io.h
+++ b/c++/src/kj/io.h
@@ -257,6 +257,10 @@ public:
  inline operator int() const { return fd; }
  inline int get() const { return fd; }

+  operator bool() const = delete;
+  // Deleting this operator prevents accidental use in boolean contexts, which
+  // the int conversion operator above would otherwise allow.
+
  inline bool operator==(decltype(nullptr)) { return fd < 0; }
  inline bool operator!=(decltype(nullptr)) { return fd >= 0; }