Module: RuboCop::AST::NodePattern::Macros
Overview
Helpers for defining methods based on a pattern string
Instance Method Summary
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#def_node_matcher(method_name, pattern_str, **keyword_defaults)
Define a method which applies a pattern to an AST node.
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#def_node_search(method_name, pattern_str, **keyword_defaults)
Define a method which recurses over the descendants of an AST node, checking whether any of them match the provided pattern.
Instance Method Details
#def_node_matcher(method_name, pattern_str, **keyword_defaults)
Define a method which applies a pattern to an AST node
The new method will return nil if the node does not match.
If the node matches, and a block is provided, the new method will
yield to the block (passing any captures as block arguments).
If the node matches, and no block is provided, the new method will
return the captures, or true
if there were none.
# File 'lib/rubocop/ast/node_pattern.rb', line 36
def def_node_matcher(method_name, pattern_str, **keyword_defaults) NodePattern.new(pattern_str).def_node_matcher(self, method_name, **keyword_defaults) end
#def_node_search(method_name, pattern_str, **keyword_defaults)
Define a method which recurses over the descendants of an AST node, checking whether any of them match the provided pattern
If the method name ends with '?', the new method will return true
as soon as it finds a descendant which matches. Otherwise, it will
yield all descendants which match.
# File 'lib/rubocop/ast/node_pattern.rb', line 46
def def_node_search(method_name, pattern_str, **keyword_defaults) NodePattern.new(pattern_str).def_node_search(self, method_name, **keyword_defaults) end