/*
- * Copyright 2015 Facebook, Inc.
+ * Copyright 2016 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
template <typename IntegerType>
constexpr unsigned int
digitsEnough() {
- return ceil((double(sizeof(IntegerType) * CHAR_BIT) * M_LN2) / M_LN10);
+ return (unsigned int)(ceil(sizeof(IntegerType) * CHAR_BIT * M_LN2 / M_LN10));
}
inline size_t
return folly::StringPiece(value).size();
}
-template<>
-inline size_t estimateSpaceNeeded(std::nullptr_t value) {
+template <>
+inline size_t estimateSpaceNeeded(std::nullptr_t /* value */) {
return 0;
}
size_t>::type
estimateSpaceNeeded(Src value) {
if (value < 0) {
- return 1 + digits10(static_cast<uint64_t>(-value));
+ // When "value" is the smallest negative, negating it would evoke
+ // undefined behavior, so, instead of writing "-value" below, we write
+ // "~static_cast<uint64_t>(value) + 1"
+ return 1 + digits10(~static_cast<uint64_t>(value) + 1);
}
return digits10(static_cast<uint64_t>(value));
template <class Delimiter, class T, class Tgt>
typename std::enable_if<
- IsSomeString<typename std::remove_pointer<Tgt>::type>
- ::value>::type
-toAppendDelimStrImpl(const Delimiter& delim, const T& v, Tgt result) {
+ IsSomeString<typename std::remove_pointer<Tgt>::type>::value>::type
+toAppendDelimStrImpl(const Delimiter& /* delim */, const T& v, Tgt result) {
toAppend(v, result);
}
* Variadic base case: do nothing.
*/
template <class Tgt>
-typename std::enable_if<IsSomeString<Tgt>::value>::type
-toAppend(Tgt* result) {
-}
+typename std::enable_if<IsSomeString<Tgt>::value>::type toAppend(
+ Tgt* /* result */) {}
/**
* Variadic base case: do nothing.
*/
template <class Delimiter, class Tgt>
-typename std::enable_if<IsSomeString<Tgt>::value>::type
-toAppendDelim(const Delimiter& delim, Tgt* result) {
-}
+typename std::enable_if<IsSomeString<Tgt>::value>::type toAppendDelim(
+ const Delimiter& /* delim */, Tgt* /* result */) {}
/**
* 1 element: same as toAppend.
*/
template <class Delimiter, class T, class Tgt>
-typename std::enable_if<IsSomeString<Tgt>::value>::type
-toAppendDelim(const Delimiter& delim, const T& v, Tgt* tgt) {
+typename std::enable_if<IsSomeString<Tgt>::value>::type toAppendDelim(
+ const Delimiter& /* delim */, const T& v, Tgt* tgt) {
toAppend(v, tgt);
}
* toDelim<SomeString>(SomeString str) returns itself.
*/
template <class Tgt, class Delim, class Src>
-typename std::enable_if<
- IsSomeString<Tgt>::value && std::is_same<Tgt, Src>::value,
- Tgt>::type
-toDelim(const Delim& delim, const Src & value) {
+typename std::enable_if<IsSomeString<Tgt>::value &&
+ std::is_same<Tgt, Src>::value,
+ Tgt>::type
+toDelim(const Delim& /* delim */, const Src& value) {
return value;
}
std::is_floating_point<Tgt>::value,
Tgt>::type
to(StringPiece src) {
- Tgt result = to<double>(&src);
+ Tgt result = Tgt(to<double>(&src));
detail::enforceWhitespace(src.data(), src.data() + src.size());
return result;
}
(std::is_floating_point<Src>::value && std::is_integral<Tgt>::value),
Tgt>::type
to(const Src & value) {
- Tgt result = value;
+ Tgt result = Tgt(value);
auto witness = static_cast<Src>(result);
if (value != witness) {
throw std::range_error(