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module ErrorHighlight
class DefaultFormatter
def self.message_for(spot)
# currently only a one-line code snippet is supported
if spot[:first_lineno] == spot[:last_lineno]
indent = spot[:snippet][0...spot[:first_column]].gsub(/[^\t]/, " ")
marker = indent + "^" * (spot[:last_column] - spot[:first_column])
"\n\n#{ spot[:snippet] }#{ marker }"
else
""
end
end
end
def self.formatter
Ractor.current[:__error_highlight_formatter__] || DefaultFormatter
end
def self.formatter=(formatter)
Ractor.current[:__error_highlight_formatter__] = formatter
end
end