1 files changed, 84 insertions, 0 deletions
diff --git a/src/sdlang/util.d b/src/sdlang/util.d
new file mode 100644
index 0000000..329e387
--- /dev/null
+++ b/src/sdlang/util.d
@@ -0,0 +1,84 @@
+// SDLang-D
+// Written in the D programming language.
+
+module sdlang.util;
+
+import std.algorithm;
+import std.datetime;
+import std.stdio;
+import std.string;
+
+import sdlang.token;
+
+enum sdlangVersion = "0.9.1";
+
+alias immutable(ubyte)[] ByteString;
+
+auto startsWith(T)(string haystack, T needle)
+	if( is(T:ByteString) || is(T:string) )
+{
+	return std.algorithm.startsWith( cast(ByteString)haystack, cast(ByteString)needle );
+}
+
+struct Location
+{
+	string file; /// Filename (including path)
+	int line; /// Zero-indexed
+	int col;  /// Zero-indexed, Tab counts as 1
+	size_t index; /// Index into the source
+	
+	this(int line, int col, int index)
+	{
+		this.line  = line;
+		this.col   = col;
+		this.index = index;
+	}
+	
+	this(string file, int line, int col, int index)
+	{
+		this.file  = file;
+		this.line  = line;
+		this.col   = col;
+		this.index = index;
+	}
+	
+	string toString()
+	{
+		return "%s(%s:%s)".format(file, line+1, col+1);
+	}
+}
+
+void removeIndex(E)(ref E[] arr, ptrdiff_t index)
+{
+	arr = arr[0..index] ~ arr[index+1..$];
+}
+
+void trace(string file=__FILE__, size_t line=__LINE__, TArgs...)(TArgs args)
+{
+	version(sdlangTrace)
+	{
+		writeln(file, "(", line, "): ", args);
+		stdout.flush();
+	}
+}
+
+string toString(TypeInfo ti)
+{
+	if     (ti == typeid( bool         )) return "bool";
+	else if(ti == typeid( string       )) return "string";
+	else if(ti == typeid( dchar        )) return "dchar";
+	else if(ti == typeid( int          )) return "int";
+	else if(ti == typeid( long         )) return "long";
+	else if(ti == typeid( float        )) return "float";
+	else if(ti == typeid( double       )) return "double";
+	else if(ti == typeid( real         )) return "real";
+	else if(ti == typeid( Date         )) return "Date";
+	else if(ti == typeid( DateTimeFrac )) return "DateTimeFrac";
+	else if(ti == typeid( DateTimeFracUnknownZone )) return "DateTimeFracUnknownZone";
+	else if(ti == typeid( SysTime      )) return "SysTime";
+	else if(ti == typeid( Duration     )) return "Duration";
+	else if(ti == typeid( ubyte[]      )) return "ubyte[]";
+	else if(ti == typeid( typeof(null) )) return "null";
+	
+	return "{unknown}";
+}