diff --git a/lapis.c b/lapis.c
index 0f0822a..e3f174e 100644
--- a/lapis.c
+++ b/lapis.c
@@ -78,9 +78,10 @@ void lapis_node_print(const lapis_node_t *nodes, size_t idx) {
     if ( nodes[idx].rhs_idx != SIZE_MAX ) {
         putchar(' ');
         lapis_node_print(nodes, nodes[idx].rhs_idx);
+        if ( nodes[idx].value.str[0] == '[' ) putchar(' ');
     }
 
-    if ( nodes[idx].value.type == LAPIS_TTYPE_OPER ) putchar(')');
+    if ( nodes[idx].value.type == LAPIS_TTYPE_OPER ) putchar(nodes[idx].value.str[0] == '[' ? ']' : ')');
 }
 
 size_t lapis_node_count(const lapis_node_t *nodes, size_t idx) {
@@ -348,6 +349,7 @@ lapis_node_t *lapis_parse_expr(size_t *nnodes, FILE *f) {
     (num_nodes++, nodes = realloc(nodes, num_nodes * sizeof(lapis_node_t)), nodes[num_nodes-1] = NODE)
 
     int64_t paren_level = 0;
+    int64_t index_level = 0;
 
     for (size_t n=0; n < ntokens; n++) {
 
@@ -370,6 +372,10 @@ lapis_node_t *lapis_parse_expr(size_t *nnodes, FILE *f) {
                 oper_priorities[n] = 1;
                 oper_arg_form[n] = 3;
                 break;
+            case 1ul*'.'*'.'*'.':
+                oper_priorities[n] = 2;
+                oper_arg_form[n] = 1;
+                break;
             case 1ul*'=':
             case 1ul*'+'*'=':
             case 1ul*'-'*'=':
@@ -448,11 +454,11 @@ lapis_node_t *lapis_parse_expr(size_t *nnodes, FILE *f) {
                 if ( n > 0 && tokens[n-1].type == LAPIS_TTYPE_IDENT ) {
                     // treat the function identifier as a prefix operator
                     tokens[n-1].type = LAPIS_TTYPE_OPER;
-                    oper_priorities[n-1] = 15 + paren_level * 16;
+                    oper_priorities[n-1] = 15 + (paren_level + index_level) * 16;
                     oper_arg_form[n-1] = 2; // prefix-unary; takes only rhs
                 }
                 // clear the '(' as being an operator
-                oper_priorities[n] = -1;
+                oper_priorities[n] = -2;
                 tokens[n].type = LAPIS_TTYPE_NONE;
                 paren_level++;
                 break;
@@ -462,13 +468,28 @@ lapis_node_t *lapis_parse_expr(size_t *nnodes, FILE *f) {
                     goto ERROR;
                 }
                 // clear the ')' as being an operator
-                oper_priorities[n] = -1;
+                oper_priorities[n] = -2;
                 tokens[n].type = LAPIS_TTYPE_NONE;
                 paren_level--;
                 break;
+            case 1ul*'[':
+                oper_priorities[n] = -1; /* == 15 once the level is incremented */
+                oper_arg_form[n] = 3;
+                index_level++;
+                break;
+            case 1ul*']':
+                if ( index_level == 0 ) {
+                    fprintf(stderr, "ERROR(%d): unexpected ']'\n", __LINE__);
+                    goto ERROR;
+                }
+                // clear the ']' as being an operator
+                oper_priorities[n] = -2;
+                tokens[n].type = LAPIS_TTYPE_NONE;
+                index_level--;
+                break;
         }
 
-        if ( oper_priorities[n] != -1 ) oper_priorities[n] += paren_level * 16;
+        if ( oper_priorities[n] != -2 ) oper_priorities[n] += (paren_level + index_level) * 16;
     }
 
     while (1) {