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Edit File: babel6.js

module.exports = function (fork) {
  fork.use(require("./babel"));
  fork.use(require("./flow"));

// var types = fork.types;
  var types = fork.use(require("../lib/types"));
  // var defaults = fork.shared.defaults;
  var defaults = fork.use(require("../lib/shared")).defaults;
  var def = types.Type.def;
  var or = types.Type.or;

def("Directive")
    .bases("Node")
    .build("value")
    .field("value", def("DirectiveLiteral"));

def("DirectiveLiteral")
    .bases("Node", "Expression")
    .build("value")
    .field("value", String, defaults["use strict"]);

def("BlockStatement")
    .bases("Statement")
    .build("body")
    .field("body", [def("Statement")])
    .field("directives", [def("Directive")], defaults.emptyArray);

def("Program")
    .bases("Node")
    .build("body")
    .field("body", [def("Statement")])
    .field("directives", [def("Directive")], defaults.emptyArray);

// Split Literal
  def("StringLiteral")
    .bases("Literal")
    .build("value")
    .field("value", String);

def("NumericLiteral")
    .bases("Literal")
    .build("value")
    .field("value", Number);

def("NullLiteral")
    .bases("Literal")
    .build();

def("BooleanLiteral")
    .bases("Literal")
    .build("value")
    .field("value", Boolean);

def("RegExpLiteral")
    .bases("Literal")
    .build("pattern", "flags")
    .field("pattern", String)
    .field("flags", String);

var ObjectExpressionProperty = or(
    def("Property"),
    def("ObjectMethod"),
    def("ObjectProperty"),
    def("SpreadProperty")
  );

// Split Property -> ObjectProperty and ObjectMethod
  def("ObjectExpression")
    .bases("Expression")
    .build("properties")
    .field("properties", [ObjectExpressionProperty]);

// ObjectMethod hoist .value properties to own properties
  def("ObjectMethod")
    .bases("Node", "Function")
    .build("kind", "key", "params", "body", "computed")
    .field("kind", or("method", "get", "set"))
    .field("key", or(def("Literal"), def("Identifier"), def("Expression")))
    .field("params", [def("Pattern")])
    .field("body", def("BlockStatement"))
    .field("computed", Boolean, defaults["false"])
    .field("generator", Boolean, defaults["false"])
    .field("async", Boolean, defaults["false"])
    .field("decorators",
           or([def("Decorator")], null),
           defaults["null"]);

def("ObjectProperty")
    .bases("Node")
    .build("key", "value")
    .field("key", or(def("Literal"), def("Identifier"), def("Expression")))
    .field("value", or(def("Expression"), def("Pattern")))
    .field("computed", Boolean, defaults["false"]);

var ClassBodyElement = or(
    def("MethodDefinition"),
    def("VariableDeclarator"),
    def("ClassPropertyDefinition"),
    def("ClassProperty"),
    def("ClassMethod")
  );

// MethodDefinition -> ClassMethod
  def("ClassBody")
    .bases("Declaration")
    .build("body")
    .field("body", [ClassBodyElement]);

def("ClassMethod")
    .bases("Declaration", "Function")
    .build("kind", "key", "params", "body", "computed", "static")
    .field("kind", or("get", "set", "method", "constructor"))
    .field("key", or(def("Literal"), def("Identifier"), def("Expression")))
    .field("params", [def("Pattern")])
    .field("body", def("BlockStatement"))
    .field("computed", Boolean, defaults["false"])
    .field("static", Boolean, defaults["false"])
    .field("generator", Boolean, defaults["false"])
    .field("async", Boolean, defaults["false"])
    .field("decorators",
           or([def("Decorator")], null),
           defaults["null"]);

var ObjectPatternProperty = or(
    def("Property"),
    def("PropertyPattern"),
    def("SpreadPropertyPattern"),
    def("SpreadProperty"), // Used by Esprima
    def("ObjectProperty"), // Babel 6
    def("RestProperty") // Babel 6
  );

// Split into RestProperty and SpreadProperty
  def("ObjectPattern")
    .bases("Pattern")
    .build("properties")
    .field("properties", [ObjectPatternProperty])
    .field("decorators",
           or([def("Decorator")], null),
           defaults["null"]);

def("SpreadProperty")
    .bases("Node")
    .build("argument")
    .field("argument", def("Expression"));

def("RestProperty")
    .bases("Node")
    .build("argument")
    .field("argument", def("Expression"));

def("ForAwaitStatement")
    .bases("Statement")
    .build("left", "right", "body")
    .field("left", or(
      def("VariableDeclaration"),
      def("Expression")))
    .field("right", def("Expression"))
    .field("body", def("Statement"));

// The callee node of a dynamic import(...) expression.
  def("Import")
    .bases("Expression")
    .build();
};

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