From 7c8e544b520cc46c174a952e63ccd2d71002516d Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Wed, 20 May 2020 14:51:58 +0300
Subject: Partially implement dump(ostream,script::lines)

---
 libbuild2/build/script/parser+line.test.testscript |  9 +++++++
 libbuild2/build/script/parser.test.cxx             | 12 +++++++++
 libbuild2/script/script.cxx                        | 29 ++++++++++++++++------
 3 files changed, 43 insertions(+), 7 deletions(-)

diff --git a/libbuild2/build/script/parser+line.test.testscript b/libbuild2/build/script/parser+line.test.testscript
index df4e77b..fe38249 100644
--- a/libbuild2/build/script/parser+line.test.testscript
+++ b/libbuild2/build/script/parser+line.test.testscript
@@ -37,3 +37,12 @@ $* <<EOI >|
   foo 'bar' "baz" '' ""
   EOI
 #\
+
+#\
+  libbuild2/lexer+quoting.test.testscript
+
+  : tmp
+  :
+    $* <'f"oo" "foo$"'
+
+#\
diff --git a/libbuild2/build/script/parser.test.cxx b/libbuild2/build/script/parser.test.cxx
index b5afd47..ab9935d 100644
--- a/libbuild2/build/script/parser.test.cxx
+++ b/libbuild2/build/script/parser.test.cxx
@@ -72,6 +72,18 @@ namespace build2
       // argv[0] [-l]
       // argv[0] -d
       //
+      // In the first form read the script from stdin and trace the script
+      // execution to stdout using the custom print runner.
+      //
+      // In the second form read the script from stdin, parse it and dump the
+      // resulting lines to stdout.
+      //
+      // -l
+      //    Print the script line number for each executed expression.
+      //
+      // -d
+      //    Dump the parsed script to sdout.
+      //
       int
       main (int argc, char* argv[])
       {
diff --git a/libbuild2/script/script.cxx b/libbuild2/script/script.cxx
index 349b05e..04727a5 100644
--- a/libbuild2/script/script.cxx
+++ b/libbuild2/script/script.cxx
@@ -46,7 +46,7 @@ namespace build2
         // information is lost and we won't be able to restore the token
         // original representation.
         //
-//        char qseq ('\0'); // Can be used as bool.
+        char qseq ('\0'); // Can be used as bool.
 
         for (const replay_token& rt: l.tokens)
         {
@@ -57,18 +57,18 @@ namespace build2
           char lq ('\0');
           char rq ('\0');
 
-          /*
           if (t.qtype != quote_type::unquoted)
           {
             auto quote = [&t] ()
             {
               return t.qtype == quote_type::single ? '\'' : '"';
-            }
+            };
 
             if (t.qcomp) // Complete quoting.
             {
               // If we are inside quoted token sequence then we do noting.
-              // Otherwise we just quote the token not starting a sequence.
+              // Otherwise we just quote the current token not starting a
+              // sequence.
               //
               if (!qseq)
               {
@@ -78,12 +78,27 @@ namespace build2
             }
             else         // Partial quoting.
             {
+              // Note that we can not always reproduce the original tokens
+              // representation for partial quoting. For example, the
+              // following two tokens are lexed into the identical token
+              // objects:
+              //
+              // "foo
+              // f"oo"
+              //
               if (!qseq)
-                lq =
-
+              {
+                lq = quote ();
+                qseq = lq;
+              }
+              else
+              {
+                rq = quote ();
+                qseq = '\0';
+              }
             }
           }
-          */
+
           // @@ Add 2 spaces indentation for if block contents.
 
           if (t.separated                   &&
-- 
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