Class: IgniterLang::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/igniter_lang/parser.rb

Instance Method Summary collapse

Constructor Details

#initialize(tokens) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/igniter_lang/parser.rb', line 262

def initialize(tokens)
  @tokens = tokens
  @pos    = 0
  @errors = []
end

Instance Method Details

#parse ⇒ Object 



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# File 'lib/igniter_lang/parser.rb', line 268

def parse
  program = { "kind" => "source_file", "module" => nil, "imports" => [],
              "traits" => [], "impls" => [], "contract_shapes" => [],
              "contracts" => [], "types" => [], "functions" => [],
              "pipelines" => [], "olap_points" => [], "assumptions" => [],
              "parse_errors" => [] }

  # optional module declaration
  if peek_kw?("module")
    advance
    program["module"] = parse_module_path
  end

  # imports
  while peek_kw?("import")
    advance
    program["imports"] << parse_import
  end

  # top-level declarations
  until peek_type?(:eof)
    decl = parse_top_decl
    case decl&.fetch("kind")
    when "trait"          then program["traits"]          << decl
    when "impl"           then program["impls"]           << decl
    when "contract_shape" then program["contract_shapes"] << decl
    when "contract"       then program["contracts"]       << decl
    when "type"           then program["types"]           << decl
    when "function"       then program["functions"]       << decl
    when "pipeline"       then program["pipelines"]       << decl
    when "olap_point"     then program["olap_points"]     << decl
    when "assumptions"    then program["assumptions"].concat(decl.fetch("assumptions", []))
    end
  end

  program["parse_errors"] = @errors
  program
end