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a50df1ab0e
Adds the `syntax_suggest` syntax error display tool to Ruby through the same mechanism as `error_highlight` and `did_you_mean`. Reference ticket: https://bugs.ruby-lang.org/issues/18159 close #4845 ## What is syntax_suggest? When a syntax error is raised by requiring a file, dead_end will use a combination of indentation and lexing to identify the problem. > Note: Previously this tool was named `dead_end`. ## Known issues - SyntaxSearch's approach of showing syntax errors only works through integration with `require`, `load`, `autoload`, and `require_relative` (since it monkeypatches them to detect syntax errors). It does not work with direct Ruby file invocations https://github.com/zombocom/dead_end/issues/31. - This causes failure in the test suite (test_expected_backtrace_location_when_inheriting_from_basic_object_and_including_kernel) and confusion when inspecting backtraces if there's a different error when trying to require a file such as measuring memory (https://github.com/zombocom/syntax_suggest/issues/124#issuecomment-1006705016). - Discussed fix. We previously talked about opening up `SyntaxError` to be monkeypatched in the same way that other gems hook into `NoMethodError`. This is currently not possible and requires development work. When we last talked about it at RubyKaigi Nobu expressed an ability to make such a change.
26 lines
522 B
Ruby
26 lines
522 B
Ruby
begin
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require 'rubygems'
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rescue LoadError => e
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raise unless e.path == 'rubygems'
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warn "`RubyGems' were not loaded."
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end if defined?(Gem)
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begin
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require 'error_highlight'
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rescue LoadError
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warn "`error_highlight' was not loaded."
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end if defined?(ErrorHighlight)
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begin
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require 'did_you_mean'
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rescue LoadError
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warn "`did_you_mean' was not loaded."
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end if defined?(DidYouMean)
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begin
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require 'syntax_suggest/core_ext'
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rescue LoadError
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warn "`syntax_suggest' was not loaded."
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end if defined?(SyntaxSuggest)
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