From fd689eb883655dcb29e505b041cd02fac01f0bac Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 27 Aug 2015 15:11:40 +0200
Subject: Dist module/meta-operation initial implementation

---
 build/parser.cxx | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to 'build/parser.cxx')

diff --git a/build/parser.cxx b/build/parser.cxx
index 03c20d0..9c50d17 100644
--- a/build/parser.cxx
+++ b/build/parser.cxx
@@ -36,6 +36,8 @@ namespace build
   void parser::
   parse_buildfile (istream& is, const path& p, scope& root, scope& base)
   {
+    enter_buildfile (p);
+
     string rw (diag_relative (p)); // Relative to work.
     path_ = &rw;
 
@@ -446,6 +448,8 @@ namespace build
 
       level4 ([&]{trace (t) << "entering " << p;});
 
+      enter_buildfile (p);
+
       string rw (diag_relative (p)); // Relative to work.
       const string* op (path_);
       path_ = &rw;
@@ -585,6 +589,8 @@ namespace build
 
       level4 ([&]{trace (t) << "entering " << p;});
 
+      enter_buildfile (p);
+
       string rw (diag_relative (p)); // Relative to work.
       const string* op (path_);
       path_ = &rw;
@@ -1015,11 +1021,23 @@ namespace build
       //
       if (tt == type::dollar)
       {
+        // Switch to the variable name mode. We want to use this
+        // mode for $foo but not for $(foo). Since we don't know
+        // whether the next token is a paren or a name, we turn
+        // it on and turn it off if what we get next is a paren
+        // so that the following name is scanned in the normal
+        // mode.
+        //
+        lexer_->mode (lexer_mode::variable);
+
         next (t, tt);
 
         bool paren (tt == type::lparen);
         if (paren)
+        {
+          lexer_->mode (lexer_mode::normal);
           next (t, tt);
+        }
 
         if (tt != type::name)
           fail (t) << "variable name expected instead of " << t;
@@ -1499,6 +1517,19 @@ namespace build
     ct.prerequisites.emplace_back (p);
   }
 
+  void parser::
+  enter_buildfile (const path& p)
+  {
+    tracer trace ("parser::enter_buildfile", &path_);
+
+    const char* e (p.extension ());
+    targets.insert<buildfile> (
+      p.directory (),
+      p.leaf ().base ().string (),
+      &extension_pool.find (e == nullptr ? "" : e), // Always specified.
+      trace);
+  }
+
   token_type parser::
   next (token& t, token_type& tt)
   {
-- 
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