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Best fit arguments with YAS style #809

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Best fit arguments with YAS style #809

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efaulhaber commented Feb 14, 2024
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src/styles/yas/nest.jl Outdated
Comment on lines 4 to 29
has_closer = is_closer(fst[end])
start_line_offset = s.line_offset

optimal_placeholders =
find_optimal_nest_placeholders(fst, start_line_offset, s.opts.margin)

for i in optimal_placeholders
fst[i] = Newline(length = fst[i].len)
end

# placeholder_inds = findall(n -> n.typ === PLACEHOLDER, fst.nodes)
# for (i, ph) in enumerate(placeholder_inds)
# if i == 1 ||
# i == length(placeholder_inds) ||
# (ph < length(fst) && is_comment(fst[ph+1])) ||
# (ph > 1 && is_comment(fst[ph-1]))
# continue
# end
# fst[ph] = Whitespace(fst[ph].len)
# end

# if has_closer && length(placeholder_inds) > 0
# fst[placeholder_inds[end]] = Whitespace(10)
# end
@info "" fst.nodes
@info "" optimal_placeholders
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For some reason, this doesn't find any optimal placeholders:

julia> print(format_text(str, YASStyle(), margin = 36))
┌ Info: 
│   fst.nodes =
│    16-element Vector{JuliaFormatter.FST}:
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 3, "foo", nothing, nothing, JuliaFormatter.AllowNest, 0, 10, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, "(", nothing, nothing, JuliaFormatter.AllowNest, 0, 13, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 4, "arg1", nothing, nothing, JuliaFormatter.AllowNest, 0, 14, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 18, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 0, 1, " ", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 4, "arg2", nothing, nothing, JuliaFormatter.AllowNest, 0, 20, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 24, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 0, 1, " ", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 4, "arg3", nothing, nothing, JuliaFormatter.AllowNest, 0, 26, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 30, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 0, 1, " ", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 4, "arg4", nothing, nothing, JuliaFormatter.AllowNest, 0, 32, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 36, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 0, 1, " ", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 4, "arg5", nothing, nothing, JuliaFormatter.AllowNest, 0, 38, nothing)
└     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, ")", nothing, nothing, JuliaFormatter.AllowNest, 0, 42, nothing)
┌ Info: 
└   optimal_placeholders = Int64[]
function foo(arg1, arg2, arg3, arg4,
             arg5)
    return body
end

When I run the same with SciML style, I get

┌ Info: 
│   fst.nodes =
│    18-element Vector{JuliaFormatter.FST}:
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 4, 3, "foo", nothing, nothing, JuliaFormatter.AllowNest, 0, 10, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 4, 1, "(", nothing, nothing, JuliaFormatter.AllowNest, 0, 13, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 4, 0, "", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 4, 4, "arg1", nothing, nothing, JuliaFormatter.AllowNest, 0, 14, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 4, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 18, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 4, 1, " ", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 4, 4, "arg2", nothing, nothing, JuliaFormatter.AllowNest, 0, 20, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 4, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 24, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 4, 1, " ", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 4, 4, "arg3", nothing, nothing, JuliaFormatter.AllowNest, 0, 26, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 4, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 30, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 4, 1, " ", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 4, 4, "arg4", nothing, nothing, JuliaFormatter.AllowNest, 0, 32, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 4, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 36, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 4, 1, " ", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 4, 4, "arg5", nothing, nothing, JuliaFormatter.AllowNest, 0, 38, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 4, 0, "", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
└     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 4, 1, ")", nothing, nothing, JuliaFormatter.AllowNest, 0, 42, nothing)
┌ Info: 
│   optimal_placeholders =
│    1-element Vector{Int64}:
└     12

There are only two extra placeholders with SciML style. One after the opening parenthesis, one before the closing parenthesis. @domluna Why does it find an optimal placeholder there after arg3, but not with the FST above without the two extra placeholders?
I tried looking into find_optimal_nest_placeholders, but it's too complicated.

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@domluna domluna Feb 15, 2024 •
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de690b9

this seems to work. with yas the indent is different

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It now works for margin 36,

julia> print(format_text(str, YASStyle(), margin = 36))
┌ Info: 
│   fst.nodes =
│    16-element Vector{JuliaFormatter.FST}:
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 3, "foo", nothing, nothing, JuliaFormatter.AllowNest, 0, 10, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, "(", nothing, nothing, JuliaFormatter.AllowNest, 0, 13, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 4, "arg1", nothing, nothing, JuliaFormatter.AllowNest, 0, 14, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 18, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 0, 1, " ", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 4, "arg2", nothing, nothing, JuliaFormatter.AllowNest, 0, 20, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 24, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 0, 1, " ", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 4, "arg3", nothing, nothing, JuliaFormatter.AllowNest, 0, 26, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 30, nothing)
│     JuliaFormatter.FST(JuliaFormatter.NEWLINE, -1, -1, 0, 1, "\n", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 4, "arg4", nothing, nothing, JuliaFormatter.AllowNest, 0, 32, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 36, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 0, 1, " ", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 4, "arg5", nothing, nothing, JuliaFormatter.AllowNest, 0, 38, nothing)
└     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, ")", nothing, nothing, JuliaFormatter.AllowNest, 0, 42, nothing)
┌ Info: 
│   optimal_placeholders =
│    1-element Vector{Int64}:
└     11
function foo(arg1, arg2, arg3,
             arg4, arg5)
    return body
end

but not for 38:

julia> print(format_text(str, YASStyle(), margin = 38))
┌ Info: 
│   fst.nodes =
│    16-element Vector{JuliaFormatter.FST}:
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 3, "foo", nothing, nothing, JuliaFormatter.AllowNest, 0, 10, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, "(", nothing, nothing, JuliaFormatter.AllowNest, 0, 13, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 4, "arg1", nothing, nothing, JuliaFormatter.AllowNest, 0, 14, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 18, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 0, 1, " ", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 4, "arg2", nothing, nothing, JuliaFormatter.AllowNest, 0, 20, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 24, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 0, 1, " ", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 4, "arg3", nothing, nothing, JuliaFormatter.AllowNest, 0, 26, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 30, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 0, 1, " ", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 4, "arg4", nothing, nothing, JuliaFormatter.AllowNest, 0, 32, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, ",", nothing, nothing, JuliaFormatter.AllowNest, 0, 36, nothing)
│     JuliaFormatter.FST(JuliaFormatter.PLACEHOLDER, 1, 1, 0, 1, " ", nothing, nothing, JuliaFormatter.AllowNest, 0, -1, nothing)
│     JuliaFormatter.FST(JuliaFormatter.IDENTIFIER, 1, 1, 0, 4, "arg5", nothing, nothing, JuliaFormatter.AllowNest, 0, 38, nothing)
└     JuliaFormatter.FST(JuliaFormatter.PUNCTUATION, 1, 1, 0, 1, ")", nothing, nothing, JuliaFormatter.AllowNest, 0, 42, nothing)
┌ Info: 
└   optimal_placeholders = Int64[]
function foo(arg1, arg2, arg3, arg4,
             arg5)
    return body
end

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ok another patch: 6175baa

The initial segment could have a different offset than the other segments. Particularly, this is true for YAS, where it's illegal to put the initial argument on the next line.

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@efaulhaber ^

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Thanks! Best fit now works for calls with YASStyle. But I broke #807 again...

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Hold on, now it works. Probably a Revise issue.

I'll hopefully find time this week to check the failing tests and make this work for n_vect! as well.

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@efaulhaber @domluna