Class: Collie::Linter::Rules::UndefinedSymbol

Inherits:
Base
  • Object
show all
Defined in:
lib/collie/linter/rules/undefined_symbol.rb

Overview

Detects references to undeclared tokens or nonterminals

Instance Method Summary collapse

Methods inherited from Base

#autocorrectable?, #initialize

Constructor Details

This class inherits a constructor from Collie::Linter::Base

Instance Method Details

#check(ast, context = {}) ⇒ Object 



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# File 'lib/collie/linter/rules/undefined_symbol.rb', line 15

def check(ast, context = {})
  symbol_table = context[:symbol_table] || build_symbol_table(ast)

  ast.rules.each do |rule|
    rule.alternatives.each do |alt|
      alt.symbols.each do |symbol|
        next if symbol_table.declared?(symbol.name)

        add_offense(symbol,
                    message: "Undefined symbol '#{symbol.name}'")
      end
    end
  end

  @offenses
end