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Changed how vector_data works. (#4467)

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In some debug environments using vector[i] does bounds checking even
though the standard specifies that it should not. Using
*(vector.begin()) sidesteps this though, giving the same result without
the bounds checking.
This commit is contained in:
Alex Ames
2017-10-20 16:49:15 -07:00
committed by Wouter van Oortmerssen
parent f2627e16ac
commit 97face1527
1 changed files with 4 additions and 2 deletions
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6
include/flatbuffers/stl_emulation.h
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@@ -41,12 +41,14 @@ inline char string_back(const std::string &value) {
// Helper method that retrieves ::data() from a vector in a way that is // Helper method that retrieves ::data() from a vector in a way that is
// compatible with pre C++11 STLs (e.g stlport). // compatible with pre C++11 STLs (e.g stlport).
template <typename T> inline T *vector_data(std::vector<T> &vector) { template <typename T> inline T *vector_data(std::vector<T> &vector) {
return &(vector[0]); // In some debug environments, operator[] does bounds checking, so &vector[0]
// can't be used.
return &(*vector.begin());
} }
template <typename T> inline const T *vector_data( template <typename T> inline const T *vector_data(
const std::vector<T> &vector) { const std::vector<T> &vector) {
return &(vector[0]); return &(*vector.begin());
} }
template <typename T, typename V> template <typename T, typename V>