/// <summary>
/// Renders a single SwitchStatement with the given indentation
/// </summary>
/// <returns>The VHDL lines in the statement.</returns>
/// <param name="method">The method the statement belongs to.</param>
/// <param name="s">The statement to render.</param>
/// <param name="indentation">The indentation to use.</param>
private IEnumerable <string> RenderStatement(AST.Method method, AST.SwitchStatement s, int indentation)
{
var indent = new string(' ', indentation);
indentation += 4;
var indent2 = new string(' ', indentation);
indentation += 4;
yield return($"{indent}switch({RenderExpression(s.SwitchExpression)}) {{");
var hasOthers = false;
foreach (var c in s.Cases)
{
if (c.Item1.Length == 1 && c.Item1.First() is EmptyExpression)
{
hasOthers = true;
yield return($"{indent2}default:");
}
else
{
foreach (var cs in c.Item1.Select(x => RenderExpression(x)))
{
yield return($"{indent2}case {cs}:");
}
}
foreach (var ss in c.Item2.SelectMany(x => RenderStatement(method, x, indentation)))
{
yield return(ss);
}
yield return($"{indent2}break;");
}
if (!hasOthers)
{
yield return($"{indent2}default:");
}
yield return($"{indent}}}");
}
/// <summary>
/// Renders a single SwitchStatement with the given indentation
/// </summary>
/// <returns>The VHDL lines in the statement.</returns>
/// <param name="method">The method the statement belongs to.</param>
/// <param name="s">The statement to render.</param>
/// <param name="indentation">The indentation to use.</param>
private IEnumerable <string> RenderStatement(AST.Method method, AST.SwitchStatement s, int indentation)
{
var indent = new string(' ', indentation);
indentation += 4;
var indent2 = new string(' ', indentation);
indentation += 4;
yield return($"{indent}case {RenderExpression(s.SwitchExpression)} is");
var others = new Statement[0];
foreach (var c in s.Cases)
{
if (c.Item1.Length == 1 && c.Item1.First() is EmptyExpression)
{
others = c.Item2;
continue;
}
else
{
yield return(indent2 + "when " + string.Join(" | ", c.Item1.Select(x => RenderExpression(x))) + " =>");
}
foreach (var ss in c.Item2.SelectMany(x => RenderStatement(method, x, indentation)))
{
yield return(ss);
}
}
yield return($"{indent2}when others =>");
foreach (var ss in others.SelectMany(x => RenderStatement(method, x, indentation)))
{
yield return(ss);
}
yield return($"{indent}end case;");
}
