[clang][deps] Properly capture the global module and '\n' for all module directives (#148685)

Previously, the newline after a module directive was not properly
captured and printed by `clang::printDependencyDirectivesAsSource`.

According to P1857R3, each directive must, after skipping horizontal
whitespace, appear at the start of a logical line. Because the newline
after module directives was missing, this invalidated the following
line.
This fixes tests that were previously in violation of P1857R3,
including for Objective-C directives, which should also comply with
P1857R3.

This also ensures that the global module fragment `module;` is captured
by the dependency directives scanner.

1 files changed, 2 insertions, 0 deletions

diff --git a/clang/lib/Lex/Preprocessor.cpp b/clang/lib/Lex/Preprocessor.cpp
index bcd3ea6..e278846 100644
--- a/clang/lib/Lex/Preprocessor.cpp
+++ b/clang/lib/Lex/Preprocessor.cpp
@@ -950,6 +950,8 @@ void Preprocessor::Lex(Token &Result) {
     case tok::period:
       ModuleDeclState.handlePeriod();
       break;
+    case tok::eod:
+      break;
     case tok::identifier:
       // Check "import" and "module" when there is no open bracket. The two
       // identifiers are not meaningful with open brackets.