Declaration (melange.Js_parser.Expression_parser.Expression.Declaration)

let async: Parser_env.env => (bool, list(Flow_ast.Comment.t(Loc.t)));

let generator: Parser_env.env => (bool, list(Flow_ast.Comment.t(Loc.t)));

let variance: 
  Parser_env.env =>
  parse_readonly:bool =>
  bool =>
  bool =>
  option(Flow_ast.Variance.t(Loc.t));

let function_params: 
  await:bool =>
  yield:bool =>
  Parser_env.env =>
  Js_parser.Comment_attachment.Ast.Function.Params.t(Loc.t, Loc.t);

let function_body: 
  Parser_env.env =>
  async:bool =>
  generator:bool =>
  expression:bool =>
  simple_params:bool =>
  (Flow_ast.Function.body(Loc.t, Loc.t), bool);

let check_unique_formal_parameters: 
  Parser_env.env =>
  Js_parser.Comment_attachment.Ast.Function.Params.t(Loc.t, Loc.t) =>
  unit;

let check_unique_component_formal_parameters: 
  Parser_env.env =>
  Js_parser.Comment_attachment.Ast.Statement.ComponentDeclaration.Params.t
    (Loc.t,
      Loc.t) =>
  unit;

let strict_function_post_check: 
  Parser_env.env =>
  contains_use_strict:bool =>
  option(Flow_ast.Identifier.t(Loc.t, Loc.t)) =>
  Js_parser.Comment_attachment.Ast.Function.Params.t(Loc.t, Loc.t) =>
  unit;

let strict_component_post_check: 
  Parser_env.env =>
  contains_use_strict:bool =>
  Flow_ast.Identifier.t(Loc.t, Loc.t) =>
  Js_parser.Comment_attachment.Ast.Statement.ComponentDeclaration.Params.t
    (Loc.t,
      Loc.t) =>
  unit;

let let_: 
  Parser_env.env =>
  (list(Flow_ast.Statement.VariableDeclaration.Declarator.t(Loc.t, Loc.t)), 
   list(Js_parser.Comment_attachment.Ast.Comment.t(Loc.t)), list((Loc.t, 
                                                                  Parse_error.t)));

let const: 
  Parser_env.env =>
  (list(Flow_ast.Statement.VariableDeclaration.Declarator.t(Loc.t, Loc.t)), 
   list(Js_parser.Comment_attachment.Ast.Comment.t(Loc.t)), list((Loc.t, 
                                                                  Parse_error.t)));

let var: 
  Parser_env.env =>
  (list(Flow_ast.Statement.VariableDeclaration.Declarator.t(Loc.t, Loc.t)), 
   list(Js_parser.Comment_attachment.Ast.Comment.t(Loc.t)), list((Loc.t, 
                                                                  Parse_error.t)));

let _function: Parser_env.env => Flow_ast.Statement.t(Loc.t, Loc.t);

let enum_declaration: 
  ?leading:list(Flow_ast.Comment.t(Loc.t)) =>
  Parser_env.env =>
  Flow_ast.Statement.t(Loc.t, Loc.t);

let component: Parser_env.env => Flow_ast.Statement.t(Loc.t, Loc.t);