Implement slices

1 files changed, 7 insertions, 0 deletions

diff --git a/boot/parser.yy b/boot/parser.yy
index aad5769..bc2ddb5 100644
--- a/boot/parser.yy
+++ b/boot/parser.yy
@@ -112,6 +112,7 @@ along with GCC; see the file COPYING3.  If not see
     DEFER "defer"
     CASE "case"
     OF "of"
+    TO "to"
     PIPE "|"
 %token OR "or" AND "&" XOR "xor"
     EQUALS "=" NOT_EQUAL "<>" LESS_THAN "<" GREATER_THAN ">" LESS_EQUAL "<=" GREATER_EQUAL ">="
@@ -372,6 +373,8 @@ type_expressions:
 designator_expression:
     simple_expression "[" expression "]"
         { $$ = new boot::array_access_expression(boot::make_position(@$), $1, $3); }
+    | simple_expression "[" expression "to" expression "]"
+        { $$ = new boot::slicing_expression(boot::make_position(@$), $1, $3, $5); }
     | simple_expression "." identifier
         { $$ = new boot::field_access_expression(boot::make_position(@$), $1, std::move(*$3)); }
     | simple_expression "^"
@@ -446,6 +449,10 @@ type_expression:
         {
             $$ = new boot::array_type_expression(boot::make_position(@$), $4, $2);
         }
+    | "[" "]" type_expression
+        {
+            $$ = new boot::slice_type_expression(boot::make_position(@$), $3);
+        }
     | "const" type_expression
         {
             $$ = new boot::constant_type_expression(boot::make_position(@$), $2);