partial Merge bitcoin#25872: Fix issues when calling std::move(const&)

BACKPORT NOTE:
missing changes for TRDescriptor and for mempool_args
fa87534 Fix iwyu (MacroFake)
faad673 Fix issues when calling std::move(const&) (MacroFake)

Pull request description:

  Passing a symbol to `std::move` that is marked `const` is a no-op, which can be fixed in two ways:

  * Remove the `const`, or
  * Remove the `std::move`

ACKs for top commit:
  ryanofsky:
    Code review ACK fa87534. Looks good. Good for univalue to support c++11 move optimizations

Tree-SHA512: 3dc5cad55b93cfa311abedfb811f35fc1b7f30a1c68561f15942438916c7de25e179c364be11881e01f844f9c2ccd71a3be55967ad5abd2f35b10bb7a882edea

Author: fanquake

ci/dash/lint-tidy.sh

@@ -44,6 +44,7 @@ iwyu_tool.py \
   "src/util/moneystr.cpp" \
   "src/util/serfloat.cpp" \
   "src/util/spanparsing.cpp" \
+  "src/util/string.cpp" \
   "src/util/strencodings.cpp" \
   "src/util/syserror.cpp" \
   "src/util/url.cpp" \

src/.clang-tidy

@@ -6,6 +6,7 @@ misc-unused-using-decls,
 modernize-use-default-member-init,
 modernize-use-nullptr,
 performance-for-range-copy,
+performance-move-const-arg,
 performance-unnecessary-copy-initialization,
 readability-const-return-type,
 readability-redundant-declaration,
@@ -18,7 +19,11 @@ misc-unused-using-decls,
 modernize-use-default-member-init,
 modernize-use-nullptr,
 performance-for-range-copy,
+performance-move-const-arg,
 performance-unnecessary-copy-initialization,
 readability-redundant-declaration,
 readability-redundant-string-init,
 '
+CheckOptions:
+ - key: performance-move-const-arg.CheckTriviallyCopyableMove
+   value: false

src/rpc/blockchain.cpp

@@ -2527,7 +2527,7 @@ static RPCHelpMan scantxoutset()
         for (const UniValue& scanobject : request.params[1].get_array().getValues()) {
             FlatSigningProvider provider;
             auto scripts = EvalDescriptorStringOrObject(scanobject, provider);
-            for (const auto& script : scripts) {
+            for (CScript& script : scripts) {
                 std::string inferred = InferDescriptor(script, provider)->ToString();
                 needles.emplace(script);
                 descriptors.emplace(std::move(script), std::move(inferred));

src/script/descriptor.cpp

@@ -547,7 +547,7 @@ class DescriptorImpl : public Descriptor
             if (pos++) ret += ",";
             std::string tmp;
             if (!scriptarg->ToStringHelper(arg, tmp, type, cache)) return false;
-            ret += std::move(tmp);
+            ret += tmp;
         }
         return true;
     }
@@ -571,7 +571,7 @@ class DescriptorImpl : public Descriptor
                     tmp = pubkey->ToString();
                     break;
             }
-            ret += std::move(tmp);
+            ret += tmp;
         }
         std::string subscript;
         if (!ToStringSubScriptHelper(arg, subscript, type, cache)) return false;

src/test/fuzz/txorphan.cpp

@@ -19,7 +19,6 @@
 #include <util/check.h>
 #include <util/time.h>
 
-#include <algorithm>
 #include <cstdint>
 #include <memory>
 #include <set>

src/univalue/include/univalue.h

@@ -77,14 +77,14 @@ class UniValue {
     bool isArray() const { return (typ == VARR); }
     bool isObject() const { return (typ == VOBJ); }
 
-    void push_back(const UniValue& val);
+    void push_back(UniValue val);
     void push_backV(const std::vector<UniValue>& vec);
     template <class It>
     void push_backV(It first, It last);
 
-    void __pushKV(const std::string& key, const UniValue& val);
-    void pushKV(const std::string& key, const UniValue& val);
-    void pushKVs(const UniValue& obj);
+    void __pushKV(std::string key, UniValue val);
+    void pushKV(std::string key, UniValue val);
+    void pushKVs(UniValue obj);
 
     std::string write(unsigned int prettyIndent = 0,
                       unsigned int indentLevel = 0) const;

src/univalue/lib/univalue.cpp

@@ -101,11 +101,11 @@ void UniValue::setObject()
     typ = VOBJ;
 }
 
-void UniValue::push_back(const UniValue& val_)
+void UniValue::push_back(UniValue val)
 {
     checkType(VARR);
 
-    values.push_back(val_);
+    values.push_back(std::move(val));
 }
 
 void UniValue::push_backV(const std::vector<UniValue>& vec)
@@ -115,32 +115,32 @@ void UniValue::push_backV(const std::vector<UniValue>& vec)
     values.insert(values.end(), vec.begin(), vec.end());
 }
 
-void UniValue::__pushKV(const std::string& key, const UniValue& val_)
+void UniValue::__pushKV(std::string key, UniValue val)
 {
     checkType(VOBJ);
 
-    keys.push_back(key);
-    values.push_back(val_);
+    keys.push_back(std::move(key));
+    values.push_back(std::move(val));
 }
 
-void UniValue::pushKV(const std::string& key, const UniValue& val_)
+void UniValue::pushKV(std::string key, UniValue val)
 {
     checkType(VOBJ);
 
     size_t idx;
     if (findKey(key, idx))
-        values[idx] = val_;
+        values[idx] = std::move(val);
     else
-        __pushKV(key, val_);
+        __pushKV(std::move(key), std::move(val));
 }
 
-void UniValue::pushKVs(const UniValue& obj)
+void UniValue::pushKVs(UniValue obj)
 {
     checkType(VOBJ);
     obj.checkType(VOBJ);
 
     for (size_t i = 0; i < obj.keys.size(); i++)
-        __pushKV(obj.keys[i], obj.values.at(i));
+        __pushKV(std::move(obj.keys.at(i)), std::move(obj.values.at(i)));
 }
 
 void UniValue::getObjMap(std::map<std::string,UniValue>& kv) const

src/util/message.cpp

@@ -8,7 +8,6 @@
 #include <key_io.h>
 #include <pubkey.h>
 #include <script/standard.h>
-#include <serialize.h>
 #include <uint256.h>
 #include <util/message.h>
 #include <util/strencodings.h>

src/util/strencodings.cpp

@@ -6,7 +6,6 @@
 #include <span.h>
 #include <util/strencodings.h>
 
-#include <algorithm>
 #include <array>
 #include <cassert>
 #include <cstring>

src/util/string.cpp

@@ -6,10 +6,9 @@
 
 #include <regex>
 #include <string>
-#include <utility>
 
 void ReplaceAll(std::string& in_out, const std::string& search, const std::string& substitute)
 {
     if (search.empty()) return;
-    in_out = std::regex_replace(in_out, std::regex(std::move(search)), substitute);
+    in_out = std::regex_replace(in_out, std::regex(search), substitute);
 }