Class: TRuby::ParserCombinator::TokenDeclarationParser

Inherits:
Object
  • Object
show all
Includes:
TokenDSL
Defined in:
lib/t_ruby/parser_combinator/token/token_declaration_parser.rb

Overview

Token Declaration Parser - Parse top-level declarations

Defined Under Namespace

Classes: ParseError

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from TokenDSL

#keyword, #token

Constructor Details

#initialize ⇒ TokenDeclarationParser

Returns a new instance of TokenDeclarationParser.



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# File 'lib/t_ruby/parser_combinator/token/token_declaration_parser.rb', line 27

def initialize
  @statement_parser = StatementParser.new
  @expression_parser = ExpressionParser.new
  @errors = []
end

Instance Attribute Details

#errors ⇒ Object (readonly)

Returns the value of attribute errors.



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# File 'lib/t_ruby/parser_combinator/token/token_declaration_parser.rb', line 25

def errors
  @errors
end

Instance Method Details

#has_errors? ⇒ Boolean

Check if parsing encountered any errors

Returns:



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# File 'lib/t_ruby/parser_combinator/token/token_declaration_parser.rb', line 100

def has_errors?
  !@errors.empty?
end

#parse_declaration(tokens, position = 0) ⇒ Object 



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# File 'lib/t_ruby/parser_combinator/token/token_declaration_parser.rb', line 33

def parse_declaration(tokens, position = 0)
  return TokenParseResult.failure("End of input", tokens, position) if position >= tokens.length

  position = skip_newlines(tokens, position)
  return TokenParseResult.failure("End of input", tokens, position) if position >= tokens.length

  token = tokens[position]

  case token.type
  when :def
    parse_method_def(tokens, position)
  when :public, :private, :protected
    parse_visibility_method(tokens, position)
  when :class
    parse_class(tokens, position)
  when :module
    parse_module(tokens, position)
  when :type
    parse_type_alias(tokens, position)
  when :interface
    parse_interface(tokens, position)
  else
    TokenParseResult.failure("Expected declaration, got #{token.type}", tokens, position)
  end
end

#parse_program(tokens, position = 0) ⇒ Object 



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# File 'lib/t_ruby/parser_combinator/token/token_declaration_parser.rb', line 59

def parse_program(tokens, position = 0)
  declarations = []
  @errors = []

  loop do
    position = skip_newlines(tokens, position)
    break if position >= tokens.length
    break if tokens[position].type == :eof

    token = tokens[position]

    # Check if this looks like a declaration keyword
    unless declaration_keyword?(token.type)
      # Not a declaration - skip to next line (top-level expression is allowed)
      position = skip_to_next_line(tokens, position)
      next
    end

    result = parse_declaration(tokens, position)

    if result.failure?
      # Collect error and try to recover
      # Use result.position for accurate error location (where the error actually occurred)
      error_pos = result.position
      error_token = tokens[error_pos] if error_pos < tokens.length
      @errors << ParseError.new(result.error, token: error_token)

      # Try to skip to next declaration (find next 'def', 'class', etc.)
      position = skip_to_next_declaration(tokens, position)
      next
    end

    declarations << result.value
    position = result.position
  end

  program = IR::Program.new(declarations: declarations)
  TokenParseResult.success(program, tokens, position)
end