Parse from template

[mazharenko]

Consider the following input from day 14 of year 2024

p=0,4 v=3,-3
p=6,3 v=-1,-3
p=10,3 v=-1,2
p=2,0 v=2,-1
p=0,0 v=1,3
p=3,0 v=-2,-2
p=7,6 v=-1,-3

A Superpower parser with some already implemented extensions might look like the following:

Span.EqualTo("p=")
	.IgnoreThen(Numerics.IntegerInt32)
	.ThenIgnore(Span.EqualTo(','))
	.Then(Numerics.IntegerInt32)
	.Select(x => V.Create(x.Item2, x.Item1))
	.Then(Span.EqualTo(" v=")
		.IgnoreThen(Numerics.IntegerInt32
			.ThenIgnore(Span.EqualTo(','))
			.Then(Numerics.IntegerInt32)
			.Select(x => V.Create(x.Item2, x.Item1))))
	.Lines()

Still a lot for a relatively simple input.

Should consider implementing a Parser as a template with injected Parsers, so that must be a Superpower unit easily combined with other parsers. This is expected to be possible with custom interpolated string handlers and might look like the following:

Template.Create($"p={Numerics.Integer32},{Numerics.Integer32} v={Numerics.Integer32},{Numerics.Integer32}")
	.Select(x => (V.Create(x.Item2, x.Item1), V.Create(x.Item4, x.Item3)))
	.Lines()

I'm not happy with the tuple stuff though, but some extensions should help with it.

[mazharenko]

Implemented for the following syntax:

Template.Create<int,int,int,int>($"p={Numerics.Integer32},{Numerics.Integer32} v={Numerics.Integer32},{Numerics.Integer32}") // returns TextParser<(int,int,int,int)>

or

Template.Create<(int,int,int,int)>($"p={Numerics.Integer32},{Numerics.Integer32} v={Numerics.Integer32},{Numerics.Integer32}") // returns TextParser<(int,int,int,int)>

or

Template.Create<int>($"p={Numerics.Integer32}") // returns TextParser<int>

I failed to figure out how I can make it infer the type from the formatted parsers values, basically because overloads cannot differ only by their return types. The type correspondence can be controlled by a dedicated Roslyn analyzer, though.