Introduce a new lexer function to compute the "preamble" of a file,
which is the part of the file that contains all of the initial
comments, includes, and preprocessor directives that occur before any
of the actual code. Added a new -print-preamble cc1 action that is
only used for testing.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@108913 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Driver/CC1Options.td b/include/clang/Driver/CC1Options.td
index 4502401..72dca18 100644
--- a/include/clang/Driver/CC1Options.td
+++ b/include/clang/Driver/CC1Options.td
@@ -304,6 +304,9 @@
HelpText<"Apply fix-it advice creating a file with the given suffix">;
def parse_print_callbacks : Flag<"-parse-print-callbacks">,
HelpText<"Run parser and print each callback invoked">;
+def print_preamble : Flag<"-print-preamble">,
+ HelpText<"Print the \"preamble\" of a file, which is a candidate for implicit"
+ " precompiled headers.">;
def emit_html : Flag<"-emit-html">,
HelpText<"Output input source as HTML">;
def ast_print : Flag<"-ast-print">,