From 71724633a24fccfdf3d56a19176d8afe637be843 Mon Sep 17 00:00:00 2001
From: Gabor Bencze <b.gabor98@gmail.com>
Date: Sun, 4 Aug 2019 18:35:43 +0200
Subject: cmCommand refactor: cmMathCommand

---
 Source/cmCommands.cxx    |  2 +-
 Source/cmMathCommand.cxx | 37 ++++++++++++++++++++++---------------
 Source/cmMathCommand.h   | 27 ++-------------------------
 3 files changed, 25 insertions(+), 41 deletions(-)

diff --git a/Source/cmCommands.cxx b/Source/cmCommands.cxx
index 6dd3e92..68122af 100644
--- a/Source/cmCommands.cxx
+++ b/Source/cmCommands.cxx
@@ -148,7 +148,7 @@ void GetScriptingCommands(cmState* state)
   state->AddBuiltinCommand("macro", cmMacroCommand);
   state->AddBuiltinCommand("make_directory", cmMakeDirectoryCommand);
   state->AddBuiltinCommand("mark_as_advanced", cmMarkAsAdvancedCommand);
-  state->AddBuiltinCommand("math", cm::make_unique<cmMathCommand>());
+  state->AddBuiltinCommand("math", cmMathCommand);
   state->AddBuiltinCommand("message", cm::make_unique<cmMessageCommand>());
   state->AddBuiltinCommand("option", cm::make_unique<cmOptionCommand>());
   state->AddBuiltinCommand("cmake_parse_arguments",
diff --git a/Source/cmMathCommand.cxx b/Source/cmMathCommand.cxx
index 48b9a27..83c22aa 100644
--- a/Source/cmMathCommand.cxx
+++ b/Source/cmMathCommand.cxx
@@ -2,6 +2,7 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmMathCommand.h"
 
+#include "cmExecutionStatus.h"
 #include "cmExprParserHelper.h"
 #include "cmMakefile.h"
 #include "cmMessageType.h"
@@ -9,28 +10,33 @@
 
 #include <stdio.h>
 
-class cmExecutionStatus;
+namespace {
+bool HandleExprCommand(std::vector<std::string> const& args,
+                       cmExecutionStatus& status);
+}
 
-bool cmMathCommand::InitialPass(std::vector<std::string> const& args,
-                                cmExecutionStatus&)
+bool cmMathCommand(std::vector<std::string> const& args,
+                   cmExecutionStatus& status)
 {
   if (args.empty()) {
-    this->SetError("must be called with at least one argument.");
+    status.SetError("must be called with at least one argument.");
     return false;
   }
   const std::string& subCommand = args[0];
   if (subCommand == "EXPR") {
-    return this->HandleExprCommand(args);
+    return HandleExprCommand(args, status);
   }
   std::string e = "does not recognize sub-command " + subCommand;
-  this->SetError(e);
+  status.SetError(e);
   return false;
 }
 
-bool cmMathCommand::HandleExprCommand(std::vector<std::string> const& args)
+namespace {
+bool HandleExprCommand(std::vector<std::string> const& args,
+                       cmExecutionStatus& status)
 {
   if ((args.size() != 3) && (args.size() != 5)) {
-    this->SetError("EXPR called with incorrect arguments.");
+    status.SetError("EXPR called with incorrect arguments.");
     return false;
   }
 
@@ -46,7 +52,7 @@ bool cmMathCommand::HandleExprCommand(std::vector<std::string> const& args)
   size_t argumentIndex = 3;
   NumericFormat outputFormat = NumericFormat::UNINITIALIZED;
 
-  this->Makefile->AddDefinition(outputVariable, "ERROR");
+  status.GetMakefile().AddDefinition(outputVariable, "ERROR");
 
   if (argumentIndex < args.size()) {
     const std::string messageHint = "sub-command EXPR ";
@@ -61,19 +67,19 @@ bool cmMathCommand::HandleExprCommand(std::vector<std::string> const& args)
         } else {
           std::string error = messageHint + "value \"" + argument +
             "\" for option \"" + option + "\" is invalid.";
-          this->SetError(error);
+          status.SetError(error);
           return false;
         }
       } else {
         std::string error =
           messageHint + "missing argument for option \"" + option + "\".";
-        this->SetError(error);
+        status.SetError(error);
         return false;
       }
     } else {
       std::string error =
         messageHint + "option \"" + option + "\" is unknown.";
-      this->SetError(error);
+      status.SetError(error);
       return false;
     }
   }
@@ -84,7 +90,7 @@ bool cmMathCommand::HandleExprCommand(std::vector<std::string> const& args)
 
   cmExprParserHelper helper;
   if (!helper.ParseString(expression.c_str(), 0)) {
-    this->SetError(helper.GetError());
+    status.SetError(helper.GetError());
     return false;
   }
 
@@ -104,9 +110,10 @@ bool cmMathCommand::HandleExprCommand(std::vector<std::string> const& args)
 
   std::string const& w = helper.GetWarning();
   if (!w.empty()) {
-    this->Makefile->IssueMessage(MessageType::AUTHOR_WARNING, w);
+    status.GetMakefile().IssueMessage(MessageType::AUTHOR_WARNING, w);
   }
 
-  this->Makefile->AddDefinition(outputVariable, buffer);
+  status.GetMakefile().AddDefinition(outputVariable, buffer);
   return true;
 }
+}
diff --git a/Source/cmMathCommand.h b/Source/cmMathCommand.h
index 23633d3..ac1957c 100644
--- a/Source/cmMathCommand.h
+++ b/Source/cmMathCommand.h
@@ -8,33 +8,10 @@
 #include <string>
 #include <vector>
 
-#include "cm_memory.hxx"
-
-#include "cmCommand.h"
-
 class cmExecutionStatus;
 
 /// Mathematical expressions: math(EXPR ...) command.
-class cmMathCommand : public cmCommand
-{
-public:
-  /**
-   * This is a virtual constructor for the command.
-   */
-  std::unique_ptr<cmCommand> Clone() override
-  {
-    return cm::make_unique<cmMathCommand>();
-  }
-
-  /**
-   * This is called when the command is first encountered in
-   * the CMakeLists.txt file.
-   */
-  bool InitialPass(std::vector<std::string> const& args,
-                   cmExecutionStatus& status) override;
-
-protected:
-  bool HandleExprCommand(std::vector<std::string> const& args);
-};
+bool cmMathCommand(std::vector<std::string> const& args,
+                   cmExecutionStatus& status);
 
 #endif
-- 
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