From de3de2d1a58556cff5d8549e9befe2ec3cf2d08a Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 25 May 2020 12:12:13 +0200
Subject: Add support for value subscript after expansions

Value subscript is only recognized in evaluation contexts (due to ambiguity
with wildcard patterns; consider: $x[123].txt) and should be unseparated from
the previous token. For example:

x = ($y[1])
x = (($f ? $y : $z)[1])
x = ($identity($y)[$z])
---
 libbuild2/parser.hxx | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'libbuild2/parser.hxx')

diff --git a/libbuild2/parser.hxx b/libbuild2/parser.hxx
index bc01e08..2f67c31 100644
--- a/libbuild2/parser.hxx
+++ b/libbuild2/parser.hxx
@@ -619,7 +619,14 @@ namespace build2
     enable_attributes ()
     {
       if (replay_ != replay::play)
-        lexer_->enable_attributes ();
+        lexer_->enable_lsbrace ();
+    }
+
+    void
+    enable_subscript ()
+    {
+      if (replay_ != replay::play)
+        lexer_->enable_lsbrace (true /* unseparated */);
     }
 
     void
-- 
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