Inline Row/ColumnDefinitions with bindings possible?

[theoractice]

Let's say there's a Grid:

	<Grid>
		<Grid.ColumnDefinitions>
			<ColumnDefinition Width="{Binding BBB}"/>
			<ColumnDefinition Width="{Binding CCC}"/>
			<ColumnDefinition Width="{Binding AAA}"/>
		</Grid.ColumnDefinitions>
	</Grid>

Then can it be changed to something like this?

	<Grid ColumnDefinitions="{Binding BBB}, {Binding CCC}, {Binding AAA}">
	</Grid>

[stevemonaco]

Not today. These things work through a duck-typed static T Parse(...) method that allows the type to be parsed in XAML from a string (without any type of converter). See:

Avalonia/src/Avalonia.Controls/ColumnDefinitions.cs

Line 41 in ae37ccd

public static ColumnDefinitions Parse(string s) => new ColumnDefinitions(s);

While lists can be parsed, bindings are complex and would need to go through compiled bindings. That capability doesn't exist today.