add a new Lexer::SkipEscapedNewLines method.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69483 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/Lexer.cpp b/lib/Lex/Lexer.cpp
index b9aa017..4d6450b 100644
--- a/lib/Lex/Lexer.cpp
+++ b/lib/Lex/Lexer.cpp
@@ -422,6 +422,29 @@
return 0;
}
+/// SkipEscapedNewLines - If P points to an escaped newline (or a series of
+/// them), skip over them and return the first non-escaped-newline found,
+/// otherwise return P.
+const char *Lexer::SkipEscapedNewLines(const char *P) {
+ while (1) {
+ const char *AfterEscape;
+ if (*P == '\\') {
+ AfterEscape = P+1;
+ } else if (*P == '?') {
+ // If not a trigraph for escape, bail out.
+ if (P[1] != '?' || P[2] != '/')
+ return P;
+ AfterEscape = P+3;
+ } else {
+ return P;
+ }
+
+ unsigned NewLineSize = Lexer::getEscapedNewLineSize(AfterEscape);
+ if (NewLineSize == 0) return P;
+ P = AfterEscape+NewLineSize;
+ }
+}
+
/// getCharAndSizeSlow - Peek a single 'character' from the specified buffer,
/// get its size, and return it. This is tricky in several cases: