Пример #1
0
            public UsingBlock(CompilerContext ctx, Local local)
            {
                if (ctx == null)
                {
                    throw new ArgumentNullException("ctx");
                }
                if (local == null)
                {
                    throw new ArgumentNullException("local");
                }
                Type type = local.Type;

                if ((type.IsValueType || type.IsSealed) && !ctx.MapType(typeof(IDisposable)).IsAssignableFrom(type))
                {
                    return;
                }
                this.local = local;
                this.ctx   = ctx;
                this.label = ctx.BeginTry();
            }
Пример #2
0
            /// <summary>
            /// Creates a new "using" block (equivalent) around a variable;
            /// the variable must exist, and note that (unlike in C#) it is
            /// the variables *final* value that gets disposed. If you need
            /// *original* disposal, copy your variable first.
            ///
            /// It is the callers responsibility to ensure that the variable's
            /// scope fully-encapsulates the "using"; if not, the variable
            /// may be re-used (and thus re-assigned) unexpectedly.
            /// </summary>
            public UsingBlock(CompilerContext ctx, Local local)
            {
                if (ctx == null) throw new ArgumentNullException("ctx");
                if (local == null) throw new ArgumentNullException("local");

                Type type = local.Type;
                // check if **never** disposable
                if ((type.IsValueType || type.IsSealed) &&
                    !ctx.MapType(typeof(IDisposable)).IsAssignableFrom(type))
                {
                    return; // nothing to do! easiest "using" block ever
                    // (note that C# wouldn't allow this as a "using" block,
                    // but we'll be generous and simply not do anything)
                }
                this.local = local;
                this.ctx = ctx;
                label = ctx.BeginTry();
            }