add ordering operator to wcards::Card

- card.h (Card::operator<): new function.
- (Card::operator==): make const.

Signed-off-by: Aiden Woodruff <aiden@aidenw.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/card.h b/card.h
index 1864a0b..fcb0efc 100644
--- a/card.h
+++ b/card.h
@@ -24,9 +24,12 @@ namespace wcards {
                         if (ranks.find(str[1]) != std::string::npos)
                                 value += ranks.find(str[1]) + 1;
                 }
-                bool operator==(const Card& rhs) {
+                bool operator==(const Card& rhs) const noexcept {
                         return value == rhs.value;
                 }
+                bool operator<(const Card& rhs) const noexcept {
+                        return value < rhs.value;
+                }
                 operator bool(void) const noexcept {
                         return value != 0;
                 }