Initial support for loading dependency info from buildfiles

Also a new iteration on the overall architecture. Now, for the first time,
build can read the buildfile and build itself.

g++-4.9 -std=c++14 -g -I.. -o bd bd.cxx algorithm.cxx scope.cxx parser.cxx lexer.cxx target.cxx prerequisite.cxx rule.cxx native.cxx cxx/target.cxx cxx/rule.cxx process.cxx timestamp.cxx path.cxx

g++-4.9 -std=c++14 -g -I../../.. -o driver driver.cxx ../../../build/lexer.cxx

g++-4.9 -std=c++14 -g -I../../.. -o driver driver.cxx ../../../build/lexer.cxx ../../../build/parser.cxx ../../../build/scope.cxx ../../../build/target.cxx ../../../build/native.cxx ../../../build/prerequisite.cxx ../../../build/path.cxx ../../../build/timestamp.cxx

1 files changed, 18 insertions, 4 deletions

diff --git a/build/parser b/build/parser
index c487015..e8e7314 100644
--- a/build/parser
+++ b/build/parser
@@ -8,12 +8,16 @@
 #include <string>
 #include <vector>
 #include <iosfwd>
+#include <utility>   // std::move
 #include <exception>
 
+
 #include <build/path>
 
 namespace build
 {
+  class scope;
+
   class token;
   enum class token_type;
   class lexer;
@@ -28,12 +32,21 @@ namespace build
     parser (std::ostream& diag): diag_ (diag) {}
 
     void
-    parse (std::istream&, const path&);
+    parse (std::istream&, const path&, scope&);
 
     // Recursive descent parser.
     //
   private:
-    typedef std::vector<std::string> names;
+    struct name_type
+    {
+      name_type (std::string t, std::string n)
+          : type (std::move (t)), name (std::move (n)) {}
+
+      std::string type; // Empty if untyped.
+      std::string name;
+    };
+
+    typedef std::vector<name_type> names;
 
     void
     parse_clause (token&, token_type&);
@@ -42,12 +55,12 @@ namespace build
     parse_names (token& t, token_type& tt)
     {
       names ns;
-      parse_names (t, tt, ns);
+      parse_names (t, tt, ns, nullptr);
       return ns;
     }
 
     void
-    parse_names (token&, token_type&, names&);
+    parse_names (token&, token_type&, names&, const std::string* type);
 
     // Utilities.
     //
@@ -63,6 +76,7 @@ namespace build
 
     lexer* lexer_;
     const path* path_;
+    scope* scope_;
   };
 }