parser: production `extern_calls` is nullable

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/src/parser/nit.sablecc3xx b/src/parser/nit.sablecc3xx
index 852d5b5..793fabc 100644 (file)
--- a/src/parser/nit.sablecc3xx
+++ b/src/parser/nit.sablecc3xx
@@ -262,16 +262,16 @@ propdef~toplevel {-> propdef}
        | {nobody} [doc]:no redef visibility kwmeth methid signature annotation_withend {-> New propdef.deferred_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature, annotation_withend.annotations)}
 !toplevel| {deferred} [doc]:no redef visibility kwmeth methid signature kwis kwabstract {-> New propdef.deferred_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature, Null)}
 !toplevel| {intern} [doc]:no redef visibility kwmeth methid signature kwis kwintern {-> New propdef.intern_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature)}
-       | {extern} [doc]:no redef visibility kwmeth methid signature kwis kwextern string_o extern_calls? extern_code_block? {-> New propdef.extern_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature, string_o.string, extern_calls, extern_code_block)}
-       | {extern_implicit} [doc]:no redef visibility kwmeth methid signature extern_calls? extern_code_block {-> New propdef.extern_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature, Null, extern_calls, extern_code_block)}
+       | {extern} [doc]:no redef visibility kwmeth methid signature kwis kwextern string_o extern_calls extern_code_block? {-> New propdef.extern_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature, string_o.string, extern_calls, extern_code_block)}
+       | {extern_implicit} [doc]:no redef visibility kwmeth methid signature extern_calls extern_code_block {-> New propdef.extern_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature, Null, extern_calls, extern_code_block)}
 !toplevel| {var} [doc]:no readable? writable? redef visibility kwvar attrid typing? {-> New propdef.attr(doc.doc, readable.able, writable.able, redef.kwredef, visibility, kwvar, attrid, Null, typing.type, Null, Null)}
 !toplevel| {var2} [doc]:no readable? writable? redef visibility kwvar attrid typing? assign [n2]:no expr {-> New propdef.attr(doc.doc, readable.able, writable.able, redef.kwredef, visibility, kwvar, attrid, Null, typing.type, Null, expr)}
 !toplevel| {var3} [doc]:no redef visibility kwvar id typing? writable2? annotation_withend? {-> New propdef.attr(doc.doc, Null, writable2.able, redef.kwredef, visibility, kwvar, Null, id, typing.type, annotation_withend.annotations, Null)}
 !toplevel| {var4} [doc]:no redef visibility kwvar id typing? writable2? assign [n2]:no expr annotation_withend? {-> New propdef.attr(doc.doc, Null, writable2.able, redef.kwredef, visibility, kwvar, Null, id, typing.type, annotation_withend.annotations, expr.expr)}
 !toplevel| {init} [doc]:no redef visibility kwinit methid? signature annotation_noend? kwdo stmtso kwend_o {-> New propdef.concrete_init(doc.doc, redef.kwredef, visibility, kwinit, methid, signature, annotation_noend.annotations, stmtso.expr)}
 !toplevel| {type} [doc]:no redef visibility kwtype classid typing annotation_withend? {-> New propdef.type(doc.doc, redef.kwredef, visibility, kwtype, classid, typing.type, annotation_withend.annotations)}
-!toplevel| {extern_init} [doc]:no redef visibility kwnew methid? signature kwis kwextern string_o extern_calls? extern_code_block? {-> New propdef.extern_init(doc.doc, redef.kwredef, visibility, kwnew, methid, signature, string_o.string, extern_calls, extern_code_block)}
-!toplevel| {extern_init_implicit} [doc]:no redef visibility kwnew methid? signature string_o extern_calls? extern_code_block {-> New propdef.extern_init(doc.doc, redef.kwredef, visibility, kwnew, methid, signature, string_o.string, extern_calls, extern_code_block)}
+!toplevel| {extern_init} [doc]:no redef visibility kwnew methid? signature kwis kwextern string_o extern_calls extern_code_block? {-> New propdef.extern_init(doc.doc, redef.kwredef, visibility, kwnew, methid, signature, string_o.string, extern_calls, extern_code_block)}
+!toplevel| {extern_init_implicit} [doc]:no redef visibility kwnew methid? signature string_o extern_calls extern_code_block {-> New propdef.extern_init(doc.doc, redef.kwredef, visibility, kwnew, methid, signature, string_o.string, extern_calls, extern_code_block)}
        ;
 annotation_withend {-> annotations}
        = {oneliner} kwis many_annotations {-> many_annotations.annotations}
@@ -340,8 +340,9 @@ assign_return{-> expr}
        = expr_final {-> New expr.return(Null, expr_final.expr)}
        ;
 
-extern_calls {-> extern_calls}
+extern_calls {-> extern_calls?}
        = kwimport no extern_call extern_call_tail* {-> New extern_calls( kwimport, [extern_call, extern_call_tail.extern_call] )}
+       | {null} {-> Null}
        ;
 extern_call_tail {-> extern_call}
        = comma no extern_call {-> extern_call};