On Sunday, 4 May 2014 at 21:40:04 UTC, bearophile wrote:
Mark Isaacson:
2) Create a wrapper struct that contains key and value and
whose comparison operator is defined only on the key. This
would essentially be doing what the C++ implementation does.
Until we have a tree-based associative map, use a tuple for the
key-value and define a "less" template argument like q{a.key <
b.key} or q{a[0] < b[0]}.
Bye,
bearophile
Got it, no native support. Most unfortunate. I've always been
vehemently against losing self-documentation via the
std::pair/tuple based solution to the problem. I ended up rolling
my own solution that lets you give meaningful names to the
wrapper struct's data members: http://pastebin.com/cKLccqFn
Thanks.
