Merge branch 'nix' into 'master'.

1 files changed, 86 insertions, 0 deletions

diff --git a/nix/libutil/types.hh b/nix/libutil/types.hh
new file mode 100644
index 0000000000..4b5ce9a78c
--- /dev/null
+++ b/nix/libutil/types.hh
@@ -0,0 +1,86 @@
+#pragma once
+
+#include "config.h"
+
+#include <string>
+#include <list>
+#include <set>
+
+#include <boost/format.hpp>
+
+
+namespace nix {
+
+
+/* Inherit some names from other namespaces for convenience. */
+using std::string;
+using std::list;
+using std::set;
+using std::vector;
+using boost::format;
+
+
+struct FormatOrString
+{
+    string s;
+    FormatOrString(const string & s) : s(s) { };
+    FormatOrString(const format & f) : s(f.str()) { };
+    FormatOrString(const char * s) : s(s) { };
+};
+
+
+/* BaseError should generally not be caught, as it has Interrupted as
+   a subclass. Catch Error instead. */
+class BaseError : public std::exception
+{
+protected:
+    string prefix_; // used for location traces etc.
+    string err;
+public:
+    unsigned int status; // exit status
+    BaseError(const FormatOrString & fs, unsigned int status = 1);
+    ~BaseError() throw () { };
+    const char * what() const throw () { return err.c_str(); }
+    const string & msg() const throw () { return err; }
+    const string & prefix() const throw () { return prefix_; }
+    BaseError & addPrefix(const FormatOrString & fs);
+};
+
+#define MakeError(newClass, superClass) \
+    class newClass : public superClass                  \
+    {                                                   \
+    public:                                             \
+        newClass(const FormatOrString & fs, unsigned int status = 1) : superClass(fs, status) { }; \
+    };
+
+MakeError(Error, BaseError)
+
+class SysError : public Error
+{
+public:
+    int errNo;
+    SysError(const FormatOrString & fs);
+};
+
+
+typedef list<string> Strings;
+typedef set<string> StringSet;
+
+
+/* Paths are just strings. */
+typedef string Path;
+typedef list<Path> Paths;
+typedef set<Path> PathSet;
+
+
+typedef enum {
+    lvlError = 0,
+    lvlInfo,
+    lvlTalkative,
+    lvlChatty,
+    lvlDebug,
+    lvlVomit
+} Verbosity;
+
+
+}