From ece35552fec977601cfc32a64c04c10a7ea83b3e Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@musicpd.org>
Date: Wed, 29 May 2019 22:33:51 +0200
Subject: [PATCH] config/Block: add ThrowWithNested()

---
 src/config/Block.cxx | 7 +++++++
 src/config/Block.hxx | 8 ++++++++
 2 files changed, 15 insertions(+)

diff --git a/src/config/Block.cxx b/src/config/Block.cxx
index 99dafe664..2671d7a11 100644
--- a/src/config/Block.cxx
+++ b/src/config/Block.cxx
@@ -26,6 +26,13 @@
 #include <assert.h>
 #include <stdlib.h>
 
+void
+BlockParam::ThrowWithNested() const
+{
+	std::throw_with_nested(FormatRuntimeError("Error in setting \"%s\" on line %i",
+						  name.c_str(), line));
+}
+
 int
 BlockParam::GetIntValue() const
 {
diff --git a/src/config/Block.hxx b/src/config/Block.hxx
index 8d58e6fb3..0a038c838 100644
--- a/src/config/Block.hxx
+++ b/src/config/Block.hxx
@@ -51,6 +51,14 @@ struct BlockParam {
 	unsigned GetPositiveValue() const;
 
 	bool GetBoolValue() const;
+
+	/**
+	 * Call this method in a "catch" block to throw a nested
+	 * exception showing the location of this setting in the
+	 * configuration file.
+	 */
+	[[noreturn]]
+	void ThrowWithNested() const;
 };
 
 struct ConfigBlock {