Implement a lexer for structured comments.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159223 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/CommentBriefParser.cpp b/lib/AST/CommentBriefParser.cpp
new file mode 100644
index 0000000..528fd26
--- /dev/null
+++ b/lib/AST/CommentBriefParser.cpp
@@ -0,0 +1,76 @@
+//===--- CommentBriefParser.cpp - Dumb comment parser ---------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/AST/CommentBriefParser.h"
+
+namespace clang {
+namespace comments {
+
+std::string BriefParser::Parse() {
+ std::string FirstParagraph;
+ std::string Brief;
+ bool InFirstParagraph = true;
+ bool InBrief = false;
+ bool BriefDone = false;
+
+ while (Tok.isNot(tok::eof)) {
+ if (Tok.is(tok::text)) {
+ if (InFirstParagraph)
+ FirstParagraph += Tok.getText();
+ if (InBrief)
+ Brief += Tok.getText();
+ ConsumeToken();
+ continue;
+ }
+
+ if (!BriefDone && Tok.is(tok::command) && Tok.getCommandName() == "brief") {
+ InBrief = true;
+ ConsumeToken();
+ continue;
+ }
+
+ if (Tok.is(tok::newline)) {
+ if (InFirstParagraph)
+ FirstParagraph += '\n';
+ if (InBrief)
+ Brief += '\n';
+ ConsumeToken();
+
+ if (Tok.is(tok::newline)) {
+ ConsumeToken();
+ // We found a paragraph end.
+ InFirstParagraph = false;
+ if (InBrief) {
+ InBrief = false;
+ BriefDone = true;
+ }
+ }
+ continue;
+ }
+
+ // We didn't handle this token, so just drop it.
+ ConsumeToken();
+ }
+
+ if (Brief.size() > 0)
+ return Brief;
+
+ return FirstParagraph;
+}
+
+BriefParser::BriefParser(Lexer &L) : L(L)
+{
+ // Get lookahead token.
+ ConsumeToken();
+}
+
+} // end namespace comments
+} // end namespace clang
+
+