Class: Collie::Linter::Rules::MissingStartSymbol

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

Overview

Detects missing %start declaration when it’s ambiguous

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/missing_start_symbol.rb', line 13

def check(ast, _context = {})
  has_start = ast.declarations.any? { |decl| decl.is_a?(AST::StartDeclaration) }

  # If %start is declared, no problem
  return @offenses if has_start

  # If no rules defined, it's ambiguous
  if ast.rules.empty?
    # Create a pseudo-location since we don't have a specific node
    location = AST::Location.new(file: "grammar", line: 1, column: 1)
    offense = Offense.new(
      rule: self.class,
      location: location,
      message: "No %start declaration and no rules defined"
    )
    @offenses << offense
  end

  @offenses
end