[c++2a] P0515R3: lexer support for new <=> token.
llvm-svn: 319509
diff --git a/clang/lib/Lex/Lexer.cpp b/clang/lib/Lex/Lexer.cpp
index 67dcff6..b069719 100644
--- a/clang/lib/Lex/Lexer.cpp
+++ b/clang/lib/Lex/Lexer.cpp
@@ -3522,6 +3522,24 @@
Kind = tok::lessless;
}
} else if (Char == '=') {
+ char After = getCharAndSize(CurPtr+SizeTmp, SizeTmp2);
+ if (After == '>') {
+ if (getLangOpts().CPlusPlus2a) {
+ if (!isLexingRawMode())
+ Diag(BufferPtr, diag::warn_cxx17_compat_spaceship);
+ CurPtr = ConsumeChar(ConsumeChar(CurPtr, SizeTmp, Result),
+ SizeTmp2, Result);
+ Kind = tok::spaceship;
+ break;
+ }
+ // Suggest adding a space between the '<=' and the '>' to avoid a
+ // change in semantics if this turns up in C++ <=17 mode.
+ if (getLangOpts().CPlusPlus && !isLexingRawMode()) {
+ Diag(BufferPtr, diag::warn_cxx2a_compat_spaceship)
+ << FixItHint::CreateInsertion(
+ getSourceLocation(CurPtr + SizeTmp, SizeTmp2), " ");
+ }
+ }
CurPtr = ConsumeChar(CurPtr, SizeTmp, Result);
Kind = tok::lessequal;
} else if (LangOpts.Digraphs && Char == ':') { // '<:' -> '['