public Compiler()
{
engine = new ScriptEngine("jscript");
var underscore = LoadResource("underscore.js") + LoadResource("underscore.compile.js");
vm = engine.Parse(underscore);
}
private object Parse(string text, bool expression)
{
const string varName = "x___";
object result;
engine.SetScriptState(ScriptState.Connected);
var flags = ScriptText.None;
if (expression)
{
flags |= ScriptText.IsExpression;
}
try
{
// immediate expression computation seems to work only for 64-bit
// so hack something for 32-bit...
System.Runtime.InteropServices.ComTypes.EXCEPINFO exceptionInfo;
if (parse32 != null)
{
if (expression)
{
// should work for jscript & vbscript at least...
text = varName + "=" + text;
}
parse32.ParseScriptText(text, null, null, null, IntPtr.Zero, 0, flags, out result, out exceptionInfo);
}
else
{
parse64.ParseScriptText(text, null, null, null, IntPtr.Zero, 0, flags, out result, out exceptionInfo);
}
}
catch
{
if (Site.LastException != null)
throw Site.LastException;
throw;
}
IntPtr dispatch;
if (expression)
{
// continue out 32-bit hack...
if (parse32 != null)
{
engine.GetScriptDispatch(null, out dispatch);
object dp = Marshal.GetObjectForIUnknown(dispatch);
try
{
return dp.GetType().InvokeMember(varName, BindingFlags.GetProperty, null, dp, null);
}
catch
{
if (Site.LastException != null)
throw Site.LastException;
throw;
}
}
return result;
}
engine.GetScriptDispatch(null, out dispatch);
var parsed = new ParsedScript(this, dispatch);
return parsed;
}
