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Contents
# frozen_string_literal: true
module CustomCops
class VariableNameShadowingMethod < RuboCop::Cop::Cop
# For each source file, Rubocop calls on_new_investigation, then walks the abstract syntax
# tree calling on_foo methods for each "foo" AST node - e.g on_begin, on_def, on_args,
# on_int, etc.
# We need to do two passes over the source so that we can find all the method names before
# we start looking at the nodes that assign local variables (some methods may be defined
# _after_ code that assigns shadowing local variables. We do the first one in
# on_new_investigation
def_node_search :method_names, <<~PATTERN
(:def $_ ...)
PATTERN
def on_new_investigation
ast = processed_source.ast
@declared_method_names = ast ? method_names(processed_source.ast).to_a : []
end
def on_lvasgn(node)
if @declared_method_names.include?(node.name)
add_offense(
node,
message: "Shadowing method name - `#{node.name}`."
)
end
end
end
end
Version data entries
86 entries across 86 versions & 1 rubygems