Support .a.[] and .a.[]? each syntax

Fixes #1699

src/parser.y

@@ -710,6 +710,12 @@ Term '[' ']' '?' {
 Term '[' ']' %prec NONOPT {
   $$ = block_join($1, gen_op_simple(EACH));
 } |
+Term '.' '[' ']' '?' {
+  $$ = block_join($1, gen_op_simple(EACH_OPT));
+} |
+Term '.' '[' ']' %prec NONOPT {
+  $$ = block_join($1, gen_op_simple(EACH));
+} |
 Term '[' Exp ':' Exp ']' '?' {
   $$ = gen_slice_index($1, $3, $5, INDEX_OPT);
 } |

tests/jq.test

@@ -173,6 +173,11 @@ jq: error: Cannot use number (0) as object key at <top-level>, line 1:
 [1,null,true,false,"abcdef",{},{"a":1,"b":2},[],[1,2,3,4,5],[1,2]]
 [null,"bc",[],[2,3],[2]]
 
+# chaining/suffix-list, with and without dot
+map(try .a[] catch ., try .a.[] catch ., .a[]?, .a.[]?)
+[{"a": [1,2]}, {"a": 123}]
+[1,2,1,2,1,2,1,2,"Cannot iterate over number (123)","Cannot iterate over number (123)"]
+
 #
 # Negative array indices
 #