/// <summary>
/// Adds parameter to <see cref="BlockExpression"/>
/// </summary>
public BlockBuilder Parameter <T>(out ExpressionContainer <T> parameter, T value)
{
var expression = Expression.Parameter(typeof(T));
parameter = ExpressionShortcuts.Arg <T>(expression);
return(Parameter(parameter, ExpressionShortcuts.Arg(value)));
}
/// <summary>
/// Adds parameter to <see cref="BlockExpression"/>
/// </summary>
public BlockBuilder Parameter <T>(string name, out ExpressionContainer <T> parameter, ExpressionContainer <T> value)
{
var expression = Expression.Parameter(typeof(T), name);
parameter = ExpressionShortcuts.Arg <T>(expression);
return(Parameter(parameter, value));
}
/// <summary>
/// Adds <see langword="finally" /> statement
/// </summary>
/// <param name="finally"><see langword="catch" /> block body</param>
/// <returns></returns>
public TryCatchFinallyBuilder Finally(Action <BlockBuilder> @finally)
{
var blockBuilder = ExpressionShortcuts.Block();
@finally(blockBuilder);
return(Finally(blockBuilder));
}
/// <summary>
/// Adds <see langword="catch" /> statement catching <see cref="Exception"/> specified as <typeparamref name="T"/>
/// </summary>
/// <param name="catch"><see langword="catch" /> block body</param>
/// <typeparam name="T"><see cref="Exception"/> type to catch</typeparam>
/// <returns></returns>
public TryCatchFinallyBuilder Catch <T>(Func <ExpressionContainer <T>, Expression> @catch) where T : Exception
{
var exception = ExpressionShortcuts.Var <T>();
var body = @catch(exception);
var catchBlock = Expression.Catch((ParameterExpression)exception, body);
return(Catch(catchBlock));
}
/// <summary>
/// Adds <see langword="catch" /> statement catching all <see cref="Exception"/> types
/// </summary>
/// <param name="catch"></param>
/// <param name="when"></param>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public TryCatchFinallyBuilder Catch <T>(Func <ExpressionContainer <T>, Expression> @catch, Func <ExpressionContainer <T>, ExpressionContainer <bool> > when) where T : Exception
{
var exception = ExpressionShortcuts.Var <T>();
var body = @catch(exception);
var filter = when?.Invoke(exception);
var catchBlock = filter == null
? Expression.Catch((ParameterExpression)exception, body)
: Expression.Catch((ParameterExpression)exception, body, filter);
return(Catch(catchBlock));
}
/// <summary>
/// Creates <see cref="InvocationExpression"/> out of current <see cref="BlockExpression"/>.
/// </summary>
public ExpressionContainer <T> Invoke <T>(params ExpressionContainer[] parameters)
{
var lambda = Expression.Lambda(Expression, parameters.Select(o => (ParameterExpression)o.Expression));
return(ExpressionShortcuts.Arg <T>(Expression.Invoke(lambda)));
}
