Move to AngouriMath 2.0, which renamed Latexise to Latexize

[Rafael-SOWNet]

Hello — I maintain AngouriMath, which CSharpMath.Evaluation builds on. AngouriMath 2.0 renames ILatexiseable.Latexise to ILatexizeable.Latexize, so this is advance notice with the work already done rather than a bug report after the fact.

Entirely your call whether to take it now or when 2.0 is final — the only thing that would need changing then is the version string.

CSharpMath's own public API does not change

This is the part I wanted to get right. MathItem implements the renamed interface explicitly, so MathItem.Latexise() stays exactly the name your callers know:

public abstract record MathItem : ILatexizeable {
  public abstract string Latexise();
  string ILatexizeable.Latexize() => Latexise();
}

PublicAPI.Unshipped.txt is untouched, and the public-API analyzer agrees — the build produces no RS warnings. Your consumers see nothing.

If you would rather follow the rename through to your own member for consistency, that is a two-line change and yours to make; I did not presume it.

What actually moves

Only what is on AngouriMath's side of the boundary. I let the compiler establish the list rather than grepping for the name — several sites that look affected are your own MathItem and are not:

file	change
Evaluation.cs:45	MathItem : ILatexiseable → ILatexizeable
Evaluation.cs	explicit ILatexizeable.Latexize() added
Evaluation.cs:54	Content.Latexise() → Content.Latexize() (receiver is AngouriMath.Entity)
Interpret.cs:6,7	parameter type and call
CSharpMath.Evaluation.csproj	AngouriMath 1.4.0 → 2.0.0-preview.2

Evaluation.cs:64, Evaluation.cs:76 and EvaluationTests.cs:809 call MathItem.Latexise() — your method — and are untouched.

One test expectation changes, and it is a real rendering change

InterpretTests: 1+\sqrt{2x} now expands to 1+\sqrt{2}\sqrt{x} rather than staying 1+\sqrt{2 x}. AngouriMath 2.0 splits a radical over a positive factor.

The identity √(2x) = √2·√x holds for all complex x when the factored-out constant is positive, so the output is sound — but it is a change in what your users will see rendered, so I have flagged it rather than quietly updated it. Only the Expanded line differs; Input, Simplified and Factorized are unchanged.

A bug of ours that your test suite found

Running your suite against 2.0.0-preview.1 failed two tests. The second was ours: \mathbb R+1 rendered as \mathrm{undefined}, because Expand turned RR + 1 into NaN — a 2.0 regression where collecting like terms wrote a factor back as base^1, which is an identity only where the power is defined at all.

Fixed in asc-community/AngouriMath#852 and released in 2.0.0-preview.2, which is what this PR references. Thank you — your tests caught something ours did not.

Measured

Against 2.0.0-preview.2:

CSharpMath.Evaluation.Tests  Total: 955, Errors: 0, Failed: 0, Skipped: 0

For reference, before this change: 955 green on AngouriMath 1.4.0, two red on 2.0.0-preview.1.

Happy to adjust anything here, or to close it and simply leave the heads-up if you would rather do the upgrade yourselves.

[Happypig375]

@Rafael-SOWNet Can you also add the implementation and tests for the new forms of LaTeX that AngouriMath started to produce?