Add StringRef::split(StringRef), to complement StringRef::split(char).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86803 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/ADT/StringRef.h b/include/llvm/ADT/StringRef.h
index a5c43fa631c9c7b49b9a1b69aa8ed2ef1879e262..12e2c569def56ec063ecc7a7587df498bfbc1465 100644 (file)
--- a/include/llvm/ADT/StringRef.h
+++ b/include/llvm/ADT/StringRef.h
@@ -289,6 +289,23 @@ namespace llvm {
       return std::make_pair(slice(0, Idx), slice(Idx+1, npos));
     }
 
+    /// split - Split into two substrings around the first occurence of a
+    /// separator string.
+    ///
+    /// If \arg Separator is in the string, then the result is a pair (LHS, RHS)
+    /// such that (*this == LHS + Separator + RHS) is true and RHS is
+    /// maximal. If \arg Separator is not in the string, then the result is a
+    /// pair (LHS, RHS) where (*this == LHS) and (RHS == "").
+    ///
+    /// \param Separator - The string to split on.
+    /// \return - The split substrings.
+    std::pair<StringRef, StringRef> split(StringRef Separator) const {
+      size_t Idx = find(Separator);
+      if (Idx == npos)
+        return std::make_pair(*this, StringRef());
+      return std::make_pair(slice(0, Idx), slice(Idx + Separator.size(), npos));
+    }
+
     /// rsplit - Split into two substrings around the last occurence of a
     /// separator character.
     ///