lib/icu: migrate from class Error to C++ exceptions

Makefile.am

@@ -508,8 +508,7 @@ libevent_a_SOURCES = \
 
 libicu_a_SOURCES = \
 	src/lib/icu/Collate.cxx src/lib/icu/Collate.hxx \
-	src/lib/icu/Converter.cxx src/lib/icu/Converter.hxx \
-	src/lib/icu/Error.cxx src/lib/icu/Error.hxx
+	src/lib/icu/Converter.cxx src/lib/icu/Converter.hxx
 
 if HAVE_ICU
 libicu_a_SOURCES += \

src/Main.cxx

@@ -400,10 +400,7 @@ try {
 #endif
 #endif
 
-	if (!IcuInit(error)) {
-		LogError(error);
-		return EXIT_FAILURE;
-	}
+	IcuInit();
 
 	winsock_init();
 	io_thread_init();

src/lib/icu/Collate.cxx

@@ -23,10 +23,9 @@
 
 #ifdef HAVE_ICU
 #include "Util.hxx"
-#include "Error.hxx"
 #include "util/AllocatedArray.hxx"
 #include "util/ConstBuffer.hxx"
-#include "util/Error.hxx"
+#include "util/RuntimeError.hxx"
 
 #include <unicode/ucol.h>
 #include <unicode/ustring.h>
@@ -53,21 +52,16 @@ static UCollator *collator;
 
 #ifdef HAVE_ICU
 
-bool
-IcuCollateInit(Error &error)
+void
+IcuCollateInit()
 {
 	assert(collator == nullptr);
-	assert(!error.IsDefined());
 
 	UErrorCode code = U_ZERO_ERROR;
 	collator = ucol_open("", &code);
-	if (collator == nullptr) {
-		error.Format(icu_domain, int(code),
-			     "ucol_open() failed: %s", u_errorName(code));
-		return false;
-	}
-
-	return true;
+	if (collator == nullptr)
+		throw FormatRuntimeError("ucol_open() failed: %s",
+					 u_errorName(code));
 }
 
 void

src/lib/icu/Collate.hxx

@@ -26,8 +26,11 @@
 class Error;
 template<typename T> class AllocatedString;
 
-bool
-IcuCollateInit(Error &error);
+/**
+ * Throws #std::runtime_error on error.
+ */
+void
+IcuCollateInit();
 
 void
 IcuCollateFinish();

src/lib/icu/Error.cxx

-/*
- * Copyright 2003-2016 The Music Player Daemon Project
- * http://www.musicpd.org
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include "config.h"
-#include "Error.hxx"
-#include "util/Domain.hxx"
-
-const Domain icu_domain("icu");

src/lib/icu/Error.hxx

-/*
- * Copyright 2003-2016 The Music Player Daemon Project
- * http://www.musicpd.org
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#ifndef MPD_ICU_ERROR_HXX
-#define MPD_ICU_ERROR_HXX
-
-#include "check.h"
-
-class Domain;
-
-extern const Domain icu_domain;
-
-#endif

src/lib/icu/Init.cxx

@@ -19,24 +19,21 @@
 
 #include "config.h"
 #include "Init.hxx"
-#include "Error.hxx"
 #include "Collate.hxx"
-#include "util/Error.hxx"
+#include "util/RuntimeError.hxx"
 
 #include <unicode/uclean.h>
 
-bool
-IcuInit(Error &error)
+void
+IcuInit()
 {
 	UErrorCode code = U_ZERO_ERROR;
 	u_init(&code);
-	if (U_FAILURE(code)) {
-		error.Format(icu_domain, int(code),
-			     "u_init() failed: %s", u_errorName(code));
-		return false;
-	}
+	if (U_FAILURE(code))
+		throw FormatRuntimeError("u_init() failed: %s",
+					 u_errorName(code));
 
-	return IcuCollateInit(error);
+	IcuCollateInit();
 }
 
 void

src/lib/icu/Init.hxx

@@ -22,19 +22,17 @@
 
 #include "check.h"
 
-class Error;
-
 #ifdef HAVE_ICU
 
-bool
-IcuInit(Error &error);
+void
+IcuInit();
 
 void
 IcuFinish();
 
 #else
 
-static inline bool IcuInit(Error &) { return true; }
+static inline void IcuInit() {}
 static inline void IcuFinish() {}
 
 #endif