Rework scoping logic

Now the src directory is entered into the scope map and points to
the same scope as out. This means that targets that are in src,
not out (e.g., source files) will "see" rules, variables, etc.
This becomes important when we try, for example, to install a
source file (say, a header) from src: we need the rule as well
as the install.* variables.

1 files changed, 9 insertions, 0 deletions

diff --git a/build/parser b/build/parser
index 3374ac0..c5c33a1 100644
--- a/build/parser
+++ b/build/parser
@@ -100,6 +100,15 @@ namespace build
     // Utilities.
     //
   private:
+
+    // Switch to a new current scope. Note that this function might
+    // also have to switch to a new root scope if the new current
+    // scope is in another project. So both must be saved and
+    // restored.
+    //
+    void
+    switch_scope (const dir_path&);
+
     // Switch to new root scope and return the previous one.
     //
     scope*