build: use explicit constructors

adapter.hpp

@@ -26,7 +26,7 @@ namespace util::adapter {
         // reverse a container for range-based-for
         template <typename T>
         struct reverse {
-            reverse (T &_target):
+            explicit reverse (T &_target):
                 m_target (_target)
             { ; }
 
@@ -49,7 +49,7 @@ namespace util::adapter {
         struct indices {
             using typename T::size_type;
 
-            indices (T &_target):
+            explicit indices (T &_target):
                 m_target (_target)
             { ; }
 
@@ -79,7 +79,7 @@ namespace util::adapter {
             using reference  = typename std::iterator_traits<scalar<I,It>>::reference;
             using value_type = typename std::iterator_traits<scalar<I,It>>::value_type;
 
-            scalar (It _inner):
+            explicit scalar (It _inner):
                 m_inner (_inner)
             { ; }
 

alloc/allocator.hpp

@@ -28,7 +28,7 @@ namespace util::alloc {
         typedef T value_type;
 
         template <typename ...Args>
-        allocator (Args&& ...args);
+        explicit allocator (Args&& ...args);
 
         T* allocate (size_t count);
         void deallocate (T*, size_t count);

alloc/arena.hpp

@@ -26,7 +26,7 @@ namespace util::alloc {
     template <class T>
     class arena {
     public:
-        arena (T &store);
+        explicit arena (T &store);
 
         //---------------------------------------------------------------------
         template <typename U, typename ...Args>

cmdopt.hpp

@@ -117,7 +117,7 @@ namespace util::cmdopt {
 
         class bytes : public value<size_t> {
         public:
-            bytes (size_t &_value): value (_value) { }
+            explicit bytes (size_t &_value): value (_value) { }
 
             using value<size_t>::execute;
             void execute (const char *restrict) override;
@@ -168,7 +168,7 @@ namespace util::cmdopt {
     //-------------------------------------------------------------------------
     class invalid_key : public error {
     public:
-        invalid_key (std::string _key);
+        explicit invalid_key (std::string _key);
         const char* what (void) const noexcept override;
 
     private:
@@ -178,7 +178,7 @@ namespace util::cmdopt {
     //-------------------------------------------------------------------------
     class invalid_value : public error {
     public:
-        invalid_value (std::string _value);
+        explicit invalid_value (std::string _value);
         const char* what (void) const noexcept override;
 
     private:
@@ -200,7 +200,7 @@ namespace util::cmdopt {
     //-------------------------------------------------------------------------
     class unhandled_argument : public error {
     public:
-        unhandled_argument (int index);
+        explicit unhandled_argument (int index);
         const char* what (void) const noexcept override;
 
         int index (void) const noexcept;

except.hpp

@@ -25,7 +25,7 @@
 namespace util {
     class input_error : public std::runtime_error {
         public:
-            input_error (const std::string &_what):
+            explicit input_error (const std::string &_what):
                     runtime_error (_what)
             { ; }
     };
@@ -33,7 +33,7 @@ namespace util {
 
     class output_error : public std::runtime_error {
         public:
-            output_error (const std::string &_what):
+            explicit output_error (const std::string &_what):
                 runtime_error (_what)
             { ; }
     };
@@ -41,7 +41,7 @@ namespace util {
 
     class unavailable_error : public std::runtime_error {
         public:
-            unavailable_error (const std::string &_what):
+            explicit unavailable_error (const std::string &_what):
                     runtime_error (_what)
             { ; }
     };
@@ -50,7 +50,7 @@ namespace util {
     /// An exception class used for reporting errors signalled by errno.
     class errno_error : public std::runtime_error {
     public:
-        errno_error (int code);
+        explicit errno_error (int code);
         errno_error ();
 
         int code (void) const;
@@ -73,7 +73,7 @@ namespace util {
 namespace  util {
     class win32_error : public std::runtime_error {
     public:
-        win32_error (DWORD _code);
+        explicit win32_error (DWORD _code);
         win32_error ();
 
         DWORD code (void) const;

fixup/experimental/filesystem.hpp

@@ -29,7 +29,7 @@ namespace std::experimental::filesystem {
         static constexpr value_type preferred_separator = '/';
 
         path ();
-        path (const path&);
+        explicit path (const path&);
 
         template <class Source>
         path (const Source &s):

format.hpp

@@ -53,7 +53,7 @@ namespace util::format {
     public:
         using value_type = ValueT;
 
-        invalid_specifier (char specifier);
+        explicit invalid_specifier (char specifier);
 
         char specifier (void) const;
 

io.hpp

@@ -69,7 +69,7 @@ namespace util {
     //-------------------------------------------------------------------------
     template <typename T>
     struct indented {
-        indented (const T &_data);
+        explicit indented (const T &_data);
         const T &data;
     };
 
@@ -100,7 +100,7 @@ namespace util {
     //-------------------------------------------------------------------------
     class path_error : public std::runtime_error {
     public:
-        path_error (const std::experimental::filesystem::path &path);
+        explicit path_error (const std::experimental::filesystem::path &path);
 
         const std::experimental::filesystem::path& path (void) const noexcept;
 

json/except.hpp

@@ -24,7 +24,7 @@
 namespace json {
     /// The base class for all exceptions throw directly by the json namespace.
     struct error : public std::runtime_error {
-        error (const std::string &what):
+        explicit error (const std::string &what):
             runtime_error (what)
         { ; }
     };
@@ -32,7 +32,7 @@ namespace json {
 
     /// Base class for all type conversion errors
     struct type_error : public error {
-        type_error (const std::string &what):
+        explicit type_error (const std::string &what):
             error (what)
         { ; }
     };
@@ -51,7 +51,7 @@ namespace json {
 
     /// Base class for errors thrown during schema validation
     struct schema_error : public error {
-        schema_error (const std::string &what):
+        explicit schema_error (const std::string &what):
             error (what)
         { ; }
     };

library_win32.hpp

@@ -25,7 +25,7 @@ namespace util {
     namespace detail::win32 {
         class library {
         public:
-            library (const std::experimental::filesystem::path&);
+            explicit library (const std::experimental::filesystem::path&);
             ~library ();
 
             void* symbol (const char *name);

memory/deleter.hpp

@@ -25,7 +25,7 @@ namespace util::memory {
     public:
         using func_t = std::function<void(T*)>;
 
-        func_deleter (func_t _func):
+        explicit func_deleter (func_t _func):
             m_func (_func)
         { ; }
 

rand/lcg.hpp

@@ -35,7 +35,7 @@ namespace util::rand {
 
         static_assert (std::is_unsigned<T>::value,
                        "LCG generates integer overflow which is undefined behaviour for signed types");
-        lcg (T seed);
+        explicit lcg (T seed);
 
         result_type operator() (void);
 

rand/mwc64x.hpp

@@ -30,7 +30,7 @@ namespace util::rand {
         using value_type = uint32_t;
         using seed_type  = uint64_t;
 
-        mwc64x (seed_type);
+        explicit mwc64x (seed_type);
 
         value_type operator() (void);
 

rand/xorshift.hpp

@@ -28,7 +28,7 @@ namespace util::rand {
     public:
         using result_type = T;
 
-        xorshift (T seed);
+        explicit xorshift (T seed);
 
         result_type operator() (void);
 

signal.hpp

@@ -109,7 +109,7 @@ namespace util {
     template <typename T>
     class value_signal : public signal<void(T)> {
     public:
-        value_signal (T);
+        explicit value_signal (T);
         value_signal () = default;
 
         operator const T&() const;

stream.hpp

@@ -25,7 +25,7 @@ namespace util::stream {
         #define SCOPED(NAME,TYPE)           \
         class NAME {                        \
         public:                             \
-            NAME (std::ios_base&);  \
+            explicit NAME (std::ios_base&); \
             ~NAME ();                       \
                                             \
         private:                            \

time.hpp

@@ -48,7 +48,7 @@ namespace util {
     // ------------------------------------------------------------------------
     class period_query {
         public:
-            period_query (float seconds);
+            explicit period_query (float seconds);
 
             bool poll (void);
 
@@ -62,7 +62,7 @@ namespace util {
     // ------------------------------------------------------------------------
     class rate_limiter {
         public:
-            rate_limiter (unsigned rate);
+            explicit rate_limiter (unsigned rate);
 
             void poll (void);