From 4a9ee48613cf5c59e071400280b62358eb79987e Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 2 Mar 2015 09:52:59 +0200
Subject: Indicate whether token is separated from previous one by whitespaces

---
 build/lexer | 32 ++++++++++++++++++--------------
 1 file changed, 18 insertions(+), 14 deletions(-)

(limited to 'build/lexer')

diff --git a/build/lexer b/build/lexer
index 1723ae0..67a94c8 100644
--- a/build/lexer
+++ b/build/lexer
@@ -20,11 +20,11 @@ namespace build
   public:
     lexer (std::istream& is, const std::string& name): is_ (is), fail (name) {}
 
+    // Scanner.
+    //
     token
     next ();
 
-    // Character interface.
-    //
   private:
     class xchar
     {
@@ -50,6 +50,22 @@ namespace build
       std::uint64_t c_;
     };
 
+    token
+    name (xchar, bool separated);
+
+    // Return true we have seen any spaces. Skipped empty lines don't
+    // count. In other words, we are only interested in spaces that
+    // are on the same line as the following non-space character.
+    //
+    bool
+    skip_spaces ();
+
+    xchar
+    escape ();
+
+    // Character interface.
+    //
+  private:
     xchar
     peek ();
 
@@ -67,18 +83,6 @@ namespace build
       return c.value () == xchar::traits_type::eof ();
     }
 
-    // Scanner.
-    //
-  private:
-    xchar
-    escape ();
-
-    void
-    skip_spaces ();
-
-    token
-    name (xchar);
-
     // Diagnostics.
     //
   private:
-- 
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