Enable pair recognition in the normal and eval lexer modes

We need this for the out-qualified target syntax:

h{config}@./: install = false

1 files changed, 2 insertions, 1 deletions

diff --git a/build2/lexer b/build2/lexer
index 7e59ff1..827d141 100644
--- a/build2/lexer
+++ b/build2/lexer
@@ -24,7 +24,8 @@ namespace build2
   // eval mode is used in the evaluation context. Quoted is an internal mode
   // and should not be set explicitly.
   //
-  // Note that the value mode splits names separated by the pair character.
+  // Note that the normal, value, and eval modes split names separated by the
+  // pair character (to disable pairs one can pass '\0' as a pair character).
   //
   // The alternnative modes must be set manually. The value mode is
   // automatically reset after the end of the line. The variable mode is reset