Grammar error

[Yoric]

In production 133 (NewExpression -> new MemberExpression), either arguments must be added after MemberExpression or (as in parser.sml), the new must only be seen by the lookahead.

[Yoric]

Sorry, misread the rule. Still, there's an error:

New Expression
-> MemberExpression
-> new NewExpression

will consume all the new, without leaving any for MemberExpression to determine that it's an instanciation and that it must take an argument.

Suggestion: replace -> MemberExpression by -> new MemberExpression .

[Yoric]

Additionally, the syntax used in builtins/*.es requires that arguments be optional after a new.

[Yoric]

Unrelated suggestion: the syntax used in builtins/*.es seems to require that Path use SimpleQualifiedName rather than Identifier.