From 68401040eb796422abf2a5a8a1fb442e5c27fdf0 Mon Sep 17 00:00:00 2001
From: "Steven R. Loomis" <srl@icu-project.org>
Date: Wed, 14 Dec 2016 18:41:04 +0000
Subject: [PATCH] ICU-12852 Remove some unnecessary copy (merge from bug)

X-SVN-Rev: 39542
---
 icu4c/source/i18n/dayperiodrules.cpp | 2 +-
 icu4c/source/i18n/dtptngen.cpp       | 2 +-
 icu4c/source/i18n/numsys.cpp         | 2 +-
 icu4c/source/i18n/unicode/numsys.h   | 2 +-
 icu4c/source/i18n/vtzone.cpp         | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/icu4c/source/i18n/dayperiodrules.cpp b/icu4c/source/i18n/dayperiodrules.cpp
index 30414823efd..36a962f1824 100644
--- a/icu4c/source/i18n/dayperiodrules.cpp
+++ b/icu4c/source/i18n/dayperiodrules.cpp
@@ -174,7 +174,7 @@ struct DayPeriodRulesDataSink : public ResourceSink {
         }
     }
 
-    void addCutoff(CutoffType type, UnicodeString hour_str, UErrorCode &errorCode) {
+    void addCutoff(CutoffType type, const UnicodeString &hour_str, UErrorCode &errorCode) {
         if (U_FAILURE(errorCode)) { return; }
 
         if (type == CUTOFF_TYPE_UNKNOWN) {
diff --git a/icu4c/source/i18n/dtptngen.cpp b/icu4c/source/i18n/dtptngen.cpp
index 17e7ec7cde8..c21ea265f63 100644
--- a/icu4c/source/i18n/dtptngen.cpp
+++ b/icu4c/source/i18n/dtptngen.cpp
@@ -475,7 +475,7 @@ struct AllowedHourFormatsSink : public ResourceSink {
         }
     }
 
-    AllowedHourFormat getHourFormatFromUnicodeString(UnicodeString s) {
+    AllowedHourFormat getHourFormatFromUnicodeString(const UnicodeString &s) {
         if (s.length() == 1) {
             if (s[0] == LOW_H) { return ALLOWED_HOUR_FORMAT_h; }
             if (s[0] == CAP_H) { return ALLOWED_HOUR_FORMAT_H; }
diff --git a/icu4c/source/i18n/numsys.cpp b/icu4c/source/i18n/numsys.cpp
index ce7c4d53044..a7ce23ab0d5 100644
--- a/icu4c/source/i18n/numsys.cpp
+++ b/icu4c/source/i18n/numsys.cpp
@@ -230,7 +230,7 @@ void NumberingSystem::setAlgorithmic(UBool c) {
     algorithmic = c;
 }
 
-void NumberingSystem::setDesc(UnicodeString d) {
+void NumberingSystem::setDesc(const UnicodeString &d) {
     desc.setTo(d);
 }
 void NumberingSystem::setName(const char *n) {
diff --git a/icu4c/source/i18n/unicode/numsys.h b/icu4c/source/i18n/unicode/numsys.h
index 4cc083f69bc..dd9e33f9c31 100644
--- a/icu4c/source/i18n/unicode/numsys.h
+++ b/icu4c/source/i18n/unicode/numsys.h
@@ -193,7 +193,7 @@ private:
 
     void setAlgorithmic(UBool algorithmic);
 
-    void setDesc(UnicodeString desc);
+    void setDesc(const UnicodeString &desc);
 
     void setName(const char* name);
 
diff --git a/icu4c/source/i18n/vtzone.cpp b/icu4c/source/i18n/vtzone.cpp
index e0621cc07bc..7feb5231de2 100644
--- a/icu4c/source/i18n/vtzone.cpp
+++ b/icu4c/source/i18n/vtzone.cpp
@@ -358,7 +358,7 @@ static void millisToOffset(int32_t millis, UnicodeString& str) {
 /*
  * Create a default TZNAME from TZID
  */
-static void getDefaultTZName(const UnicodeString tzid, UBool isDST, UnicodeString& zonename) {
+static void getDefaultTZName(const UnicodeString &tzid, UBool isDST, UnicodeString& zonename) {
     zonename = tzid;
     if (isDST) {
         zonename += UNICODE_STRING_SIMPLE("(DST)");