use maps.Clone from go1.21

irc/channel.go

 
 import (
 	"fmt"
+	"maps"
 	"strconv"
 	"strings"
 	"time"
 	info.Bans = channel.lists[modes.BanMask].Masks()
 	info.Invites = channel.lists[modes.InviteMask].Masks()
 	info.Excepts = channel.lists[modes.ExceptMask].Masks()
-	info.AccountToUMode = utils.CopyMap(channel.accountToUMode)
+	info.AccountToUMode = maps.Clone(channel.accountToUMode)
 
 	info.Settings = channel.settings
 

irc/client.go

 import (
 	"crypto/x509"
 	"fmt"
+	"maps"
 	"net"
 	"runtime/debug"
 	"strconv"
 func (client *Client) copyLastSeen() (result map[string]time.Time) {
 	client.stateMutex.RLock()
 	defer client.stateMutex.RUnlock()
-	return utils.CopyMap(client.lastSeen)
+	return maps.Clone(client.lastSeen)
 }
 
 // these are bit flags indicating what part of the client status is "dirty"

irc/fakelag.go

 package irc
 
 import (
+	"maps"
 	"time"
-
-	"github.com/ergochat/ergo/irc/utils"
 )
 
 // fakelag is a system for artificially delaying commands when a user issues
 	fl.config = config
 	// XXX don't share mutable member CommandBudgets:
 	if config.CommandBudgets != nil {
-		fl.config.CommandBudgets = utils.CopyMap(config.CommandBudgets)
+		fl.config.CommandBudgets = maps.Clone(config.CommandBudgets)
 	}
 	fl.nowFunc = time.Now
 	fl.sleepFunc = time.Sleep

irc/getters.go

 
 import (
 	"fmt"
+	"maps"
 	"net"
 	"time"
 
 func (client *Client) copyReadMarkers() (result map[string]time.Time) {
 	client.stateMutex.RLock()
 	defer client.stateMutex.RUnlock()
-	return utils.CopyMap(client.readMarkers)
+	return maps.Clone(client.readMarkers)
 }
 
 func (client *Client) SetReadMarker(cfname string, now time.Time) (result time.Time) {

irc/utils/types.go

 	}
 	return result
 }
-
-func CopyMap[K comparable, V any](input map[K]V) (result map[K]V) {
-	result = make(map[K]V, len(input))
-	for key, value := range input {
-		result[key] = value
-	}
-	return
-}