/// <summary>
/// Constructs a generator for unary expressions.
/// </summary>
/// <param name="kind">kind of unary expression to construct</param>
/// <param name="g">operand generator</param>
public static ExpressionGenerator UnOp(UnOp.Kind kind, ExpressionGenerator g)
{
return(() => new UnOp()
{
Operation = kind,
Operand = g()
});
}
/// <summary>
/// Returns <c>true</c> if the expression is a unary operation.
/// </summary>
public static bool IsUnOp(this Expression e, UnOp.Kind op)
{
UnOp uop = e as UnOp;
if (uop == null)
{
return(false);
}
return(uop.Operation == op);
}
/// <summary>
/// Creates a matching for the specified kind of unary operations.
/// </summary>
/// <param name="kind">kind of unary operation to match</param>
public Matching MUnOp(UnOp.Kind kind)
{
UnOp cmp = new UnOp()
{
Operation = kind
};
Matching newm = new Matching();
newm._func = e => e.NodeEquals(cmp) &&
this.Match(e.Children.ElementAt(0));
newm._gen = () => newm._expr == null ?
new UnOp()
{
Operation = kind, Operand = _gen()
} :
newm._expr;
return(newm);
}
/// <summary>
/// Creates the attribute.
/// </summary>
/// <param name="kind">kind of unary operation</param>
public MapToUnOp(UnOp.Kind kind)
{
Kind = kind;
}
