Make SparseVector work with move-only types.

Define UniqueString as a move-only string and use in a SparseVector for
ContractionState.
Remove SparseVector method specializations that are no longer needed.

1 files changed, 34 insertions, 0 deletions

diff --git a/src/UniqueString.h b/src/UniqueString.h
new file mode 100644
index 000000000..07da0f171
--- /dev/null
+++ b/src/UniqueString.h
@@ -0,0 +1,34 @@
+// Scintilla source code edit control
+/** @file UniqueString.h
+ ** Define UniqueString, a unique_ptr based string type for storage in containers
+ ** and an allocator for UniqueString.
+ **/
+// Copyright 2017 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+#ifndef UNIQUESTRING_H
+#define UNIQUESTRING_H
+
+#ifdef SCI_NAMESPACE
+namespace Scintilla {
+#endif
+
+using UniqueString = std::unique_ptr<const char[]>;
+
+/// Equivalent to strdup but produces a std::unique_ptr<const char[]> allocation to go
+/// into collections.
+inline UniqueString UniqueStringCopy(const char *text) {
+	if (!text) {
+		return UniqueString();
+	}
+	const size_t len = strlen(text);
+	char *sNew = new char[len + 1];
+	std::copy(text, text + len + 1, sNew);
+	return UniqueString(sNew);
+}
+
+#ifdef SCI_NAMESPACE
+}
+#endif
+
+#endif