From 88c9491f515f7ba479b5334ef834743fed539730 Mon Sep 17 00:00:00 2001
From: Peter Kuemmel <syntheticpp@gmx.net>
Date: Sun, 29 Jan 2012 12:28:52 +0100
Subject: add colon escaping

Needed for Windows drive names.

For instance configure with gtest:

    python configure.py --with-gtest=c$:\gtest-1.6.0
---
 src/lexer.cc      | 52 +++++++++++++++++++++++++++++++---------------------
 src/lexer.in.cc   |  4 ++++
 src/lexer_test.cc |  4 ++--
 3 files changed, 37 insertions(+), 23 deletions(-)

diff --git a/src/lexer.cc b/src/lexer.cc
index 5bc467b..a1bedf5 100644
--- a/src/lexer.cc
+++ b/src/lexer.cc
@@ -606,7 +606,7 @@ bool Lexer::ReadEvalString(EvalString* eval, bool path, string* err) {
 	}
 	++p;
 	yych = *p;
-	goto yy118;
+	goto yy120;
 yy91:
 	{
       eval->AddText(StringPiece(start, p - start));
@@ -629,7 +629,7 @@ yy94:
 	++p;
 	if ((yych = *p) <= '/') {
 		if (yych <= ' ') {
-			if (yych == '\n') goto yy107;
+			if (yych == '\n') goto yy109;
 			if (yych <= 0x1F) goto yy98;
 			goto yy100;
 		} else {
@@ -643,17 +643,21 @@ yy94:
 		}
 	} else {
 		if (yych <= '^') {
-			if (yych <= '9') goto yy104;
-			if (yych <= '@') goto yy98;
-			if (yych <= 'Z') goto yy104;
-			goto yy98;
+			if (yych <= ':') {
+				if (yych <= '9') goto yy104;
+				goto yy106;
+			} else {
+				if (yych <= '@') goto yy98;
+				if (yych <= 'Z') goto yy104;
+				goto yy98;
+			}
 		} else {
 			if (yych <= '`') {
 				if (yych <= '_') goto yy104;
 				goto yy98;
 			} else {
 				if (yych <= 'z') goto yy104;
-				if (yych <= '{') goto yy106;
+				if (yych <= '{') goto yy108;
 				goto yy98;
 			}
 		}
@@ -690,56 +694,62 @@ yy102:
 yy104:
 	++p;
 	yych = *p;
-	goto yy116;
+	goto yy118;
 yy105:
 	{
       eval->AddSpecial(StringPiece(start + 1, p - start - 1));
       continue;
     }
 yy106:
+	++p;
+	{
+      eval->AddText(StringPiece(":", 1));
+      continue;
+    }
+yy108:
 	yych = *(q = ++p);
 	if (yybm[0+yych] & 32) {
-		goto yy110;
+		goto yy112;
 	}
 	goto yy99;
-yy107:
+yy109:
 	++p;
 	yych = *p;
 	if (yybm[0+yych] & 16) {
-		goto yy107;
+		goto yy109;
 	}
 	{
       continue;
     }
-yy110:
+yy112:
 	++p;
 	yych = *p;
 	if (yybm[0+yych] & 32) {
-		goto yy110;
+		goto yy112;
 	}
-	if (yych == '}') goto yy113;
+	if (yych == '}') goto yy115;
 	p = q;
 	goto yy99;
-yy113:
+yy115:
 	++p;
 	{
       eval->AddSpecial(StringPiece(start + 2, p - start - 3));
       continue;
     }
-yy115:
+yy117:
 	++p;
 	yych = *p;
-yy116:
+yy118:
 	if (yybm[0+yych] & 64) {
-		goto yy115;
+		goto yy117;
 	}
 	goto yy105;
-yy117:
+yy119:
 	++p;
 	yych = *p;
-yy118:
+yy120:
 	if (yybm[0+yych] & 128) {
-		goto yy117;
+		goto yy119;
 	}
 	goto yy91;
 }
diff --git a/src/lexer.in.cc b/src/lexer.in.cc
index 6c00dbd..9caaa36 100644
--- a/src/lexer.in.cc
+++ b/src/lexer.in.cc
@@ -214,6 +214,10 @@ bool Lexer::ReadEvalString(EvalString* eval, bool path, string* err) {
       eval->AddSpecial(StringPiece(start + 1, p - start - 1));
       continue;
     }
+    "$:" {
+      eval->AddText(StringPiece(":", 1));
+      continue;
+    }
     "$". {
       last_token_ = start;
       return Error("bad $-escape (literal $ must be written as $$)", err);
diff --git a/src/lexer_test.cc b/src/lexer_test.cc
index 1c5894e..5795e5e 100644
--- a/src/lexer_test.cc
+++ b/src/lexer_test.cc
@@ -29,12 +29,12 @@ TEST(Lexer, ReadVarValue) {
 }
 
 TEST(Lexer, ReadEvalStringEscapes) {
-  Lexer lexer("$ $$ab $\ncde\n");
+  Lexer lexer("$ $$ab c$: $\ncde\n");
   EvalString eval;
   string err;
   EXPECT_TRUE(lexer.ReadVarValue(&eval, &err));
   EXPECT_EQ("", err);
-  EXPECT_EQ("[ $ab cde]",
+  EXPECT_EQ("[ $ab c: cde]",
             eval.Serialize());
 }
 
-- 
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