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Versions: 5
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Contents
# encoding: utf-8
module RuboCop
module Cop
# This module does auto-correction of nodes that could become grammatically
# different after the correction. If the code change would alter the
# abstract syntax tree, it is not done.
module AutocorrectUnlessChangingAST
def autocorrect(node)
c = correction(node)
new_source = rewrite_node(node)
# Make the correction only if it doesn't change the AST. Regenerate the
# AST for `node` so we get it without context. Otherwise the comparison
# could be misleading.
if ast_for(node.loc.expression.source) != ast_for(new_source)
fail CorrectionNotPossible
end
@corrections << c
end
private
def ast_for(source)
ProcessedSource.new(source).ast
end
def rewrite_node(node)
processed_source = ProcessedSource.new(node.loc.expression.source)
c = correction(processed_source.ast)
Corrector.new(processed_source.buffer, [c]).rewrite
end
end
end
end
Version data entries
5 entries across 5 versions & 2 rubygems