[Bug c++/63457] New: valarray missing std iterator limit functions
gnu at tlinx dot org
gcc-bugzilla@gcc.gnu.org
Sat Oct 4 06:40:00 GMT 2014
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63457
Bug ID: 63457
Summary: valarray missing std iterator limit functions
Product: gcc
Version: 4.8.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gnu at tlinx dot org
Running > g++ --version
g++ (SUSE Linux) 4.8.1 20130909 [gcc-4_8-branch revision 202388]
on a recent kernel, I have the following program that comes up with an error:
> g++ --std=c++11 valA.cc
valA.cc: In function ‘int main(int, char**)’:
valA.cc:34:38: error: ‘class std::valarray<std::basic_string<char> >’ has no
member named ‘begin’
for (auto &group:groups) sort(group.begin(), group.end());
^
valA.cc:34:53: error: ‘class std::valarray<std::basic_string<char> >’ has no
member named ‘end’
for (auto &group:groups) sort(group.begin(), group.end());
^
----
What I couldn't figure out was why the valarray had no begin or end members.
It does on the Mac CLANG compiler.
So why not under gnu c++?
It has been noted that if the valarray is changed to a vector, the program
compiles 'fine',
but I wasn't using a vector in my original (no .sum()) so wanted to find out
why it
didn't work w/valarray. I'm not sure, but if those are missing is this a
larger problem?
------
#include <string>
#include <vector>
#include <valarray>
#include <unordered_map>
#include <algorithm>
using std::vector;
using std::valarray;
using std::string;
using std::unordered_map;
using std::sort;
typedef valarray <string> Options;
vector <Options> groups = {
{ "red", "green", "orange", "purple", "yellow"},
{ "apple", "banana", "cherry"},
{ "butterscotch", "chocolate", "vanilla"},
{ "rain", "sunny", "hot", "pleasant" }
};
// enum {color, fruits, flavors, weather} option_choices;
Options categories = { "color", "fruits", "flavors", "weather" };
unordered_map <string, int> catmap;
int main( int argc, char *argv[] ) {
int c = 0;
for (auto &cattxt:categories) catmap[cattxt]=c++;
for (auto &group:groups) sort(group.begin(), group.end());
for (auto &cat:catmap) {
const char *ch="";
printf("Category: %s\n ", cat.first.c_str());
for (auto &opt:groups[cat.second]) {
printf("%s%s ",ch, opt.c_str());
ch=",";
}
printf("\n");
}
exit(0);
}
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