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Handle on_sp when using prism #241

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Handle on_sp when using prism #241

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2 changes: 2 additions & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
## HEAD (unreleased)

- Fix: Correctly identify trailing slashes when using Prism > 1.8.0. (https://github.com/ruby/syntax_suggest/pull/241)

## 2.0.2

- Fix: Separate multiple parser errors by newline. (https://github.com/ruby/syntax_suggest/pull/232)
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7 changes: 5 additions & 2 deletions lib/syntax_suggest/code_line.rb
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Expand Up @@ -180,10 +180,13 @@ def ignore_newline_not_beg?
# EOM
# expect(lines.first.trailing_slash?).to eq(true)
#
if SyntaxSuggest.use_prism_parser?
if SyntaxSuggest.use_prism_parser? && Prism::VERSION <= "1.8.0"
# Older versions of prism didn't correctly emit on_sp
def trailing_slash?
last = @lex.last
last&.type == :on_tstring_end
return false unless last

last.type == :on_tstring_end || (last.type == :on_sp && last.token == TRAILING_SLASH)
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@eregon eregon Jan 20, 2026

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The (last.type == :on_sp && last.token == TRAILING_SLASH) part is to handle the fact there is no Prism 1.8.1/1.9.0 yet and so no easy way to detect Prism has :on_sp vs not, right?

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@Earlopain Earlopain Jan 20, 2026

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Yeah, that's right. I tried feature detection (Prism.lex_compat(" ").value.dig(0, 1) == :on_sp) but then some other test here fails because prism loads delegate and that adds a method to Kernel which it didn't like

end
else
def trailing_slash?
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