From: Saleem Abdulrasool <compnerd@compnerd.org>
Date: Fri, 9 Mar 2018 00:06:10 +0000 (+0000)
Subject: utils: add a helper class to lit for captured substitutions
X-Git-Tag: android-x86-7.1-r4~4061
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=4fc3c08f8805c54071f6fd8c384f93f14d1f1a47;p=android-x86%2Fexternal-llvm.git

utils: add a helper class to lit for captured substitutions

On Windows, if the substitution contains a back reference, it would
removed due to the replacement of the escape character in lit. Create a
helper class to avoid this which will simply ignore the replacement and
mark the substitution as having capture groups being referenced.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@327082 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/utils/lit/lit/TestingConfig.py b/utils/lit/lit/TestingConfig.py
index 80a848b8e94..713baa620a7 100644
--- a/utils/lit/lit/TestingConfig.py
+++ b/utils/lit/lit/TestingConfig.py
@@ -152,3 +152,22 @@ class TestingConfig:
         else:
             return self.parent.root
 
+class SubstituteCaptures:
+    """
+    Helper class to indicate that the substitutions contains backreferences.
+
+    This can be used as the following in lit.cfg to mark subsitutions as having
+    back-references::
+
+        config.substutions.append(('\b[^ ]*.cpp', SubstituteCaptures('\0.txt')))
+
+    """
+    def __init__(self, substitution):
+        self.substitution = substitution
+
+    def replace(self, pattern, replacement):
+        return self.substitution
+
+    def __str__(self):
+        return self.substitution
+