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authorManoj Srivastava <srivasta@debian.org>2020-05-22 19:57:41 -0700
committerManoj Srivastava <srivasta@debian.org>2020-05-22 20:02:19 -0700
commitc3d2579ad8d7eb33059aa8fdbaf5b564411a57f2 (patch)
tree1570cda0676fdcf4171a69a7fe313c1b89a52b0c /src/include/tome/enum_string_map.hpp
parent986b7742bf244b4073ecca0723615f70be8a1ab6 (diff)
parent4e9b9c402ed95bf9a17fd6d795bc49bb4128a6fa (diff)
Merge branch 'upstream' into debian-cmake-fixes
Diffstat (limited to 'src/include/tome/enum_string_map.hpp')
-rw-r--r--src/include/tome/enum_string_map.hpp55
1 files changed, 55 insertions, 0 deletions
diff --git a/src/include/tome/enum_string_map.hpp b/src/include/tome/enum_string_map.hpp
new file mode 100644
index 00000000..814827fe
--- /dev/null
+++ b/src/include/tome/enum_string_map.hpp
@@ -0,0 +1,55 @@
+#pragma once
+
+#include <boost/bimap.hpp>
+#include <boost/noncopyable.hpp>
+#include <string>
+#include <cassert>
+
+/**
+ * Bidirectional mapping between enumerated values
+ * and strings.
+ */
+template <class E>
+class EnumStringMap : boost::noncopyable {
+
+private:
+ typedef boost::bimap< E, std::string > bimap_type;
+ typedef typename bimap_type::value_type value_type;
+
+ bimap_type bimap;
+
+public:
+ explicit EnumStringMap(std::initializer_list< std::pair<E, const char *> > in) {
+ for (auto es : in)
+ {
+ bimap.insert(value_type(es.first, es.second));
+ }
+ // Sanity check that there were no
+ // duplicate mappings.
+ assert(bimap.size() == in.size());
+ }
+
+ const char *stringify(E e) const {
+ auto i = bimap.left.find(e);
+ assert(i != bimap.left.end() && "Missing mapping for enumerated value");
+ return i->second.c_str();
+ }
+
+ E parse(const char *s) const {
+ E e;
+ bool result = parse(s, &e);
+ assert(result && "Missing string->enum mapping");
+ return e;
+ }
+
+ bool parse(const char *s, E *e) const {
+ auto i = bimap.right.find(s);
+ if (i == bimap.right.end())
+ {
+ return false;
+ }
+
+ *e = i->second;
+ return true;
+ }
+};