1 files changed, 74 insertions, 0 deletions
diff --git a/src/qdoc/qdoc/src/qdoc/puredocparser.cpp b/src/qdoc/qdoc/src/qdoc/puredocparser.cpp
new file mode 100644
index 000000000..c6de06a9c
--- /dev/null
+++ b/src/qdoc/qdoc/src/qdoc/puredocparser.cpp
@@ -0,0 +1,74 @@
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "puredocparser.h"
+
+#include "qdocdatabase.h"
+#include "tokenizer.h"
+
+#include <cerrno>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+  Parses the source file identified by \a filePath and adds its
+  parsed contents to the database. The \a location is used for
+  reporting errors.
+ */
+std::vector<UntiedDocumentation> PureDocParser::parse_qdoc_file(const QString &filePath)
+{
+    QFile in(filePath);
+    if (!in.open(QIODevice::ReadOnly)) {
+        location.error(
+                QStringLiteral("Can't open source file '%1' (%2)").arg(filePath, strerror(errno)));
+        return {};
+    }
+
+    return processQdocComments(in);
+}
+
+/*!
+  This is called by parseSourceFile() to do the actual parsing
+  and tree building. It only processes qdoc comments. It skips
+  everything else.
+ */
+std::vector<UntiedDocumentation> PureDocParser::processQdocComments(QFile& input_file)
+{
+    std::vector<UntiedDocumentation> untied{};
+
+    Tokenizer tokenizer(Location{input_file.fileName()}, input_file);
+
+    const QSet<QString> &commands = CppCodeParser::topic_commands + CppCodeParser::meta_commands;
+
+    int token = tokenizer.getToken();
+    while (token != Tok_Eoi) {
+        if (token != Tok_Doc) {
+            token = tokenizer.getToken();
+            continue;
+        }
+        QString comment = tokenizer.lexeme(); // returns an entire qdoc comment.
+        Location start_loc(tokenizer.location());
+        token = tokenizer.getToken();
+
+        Doc::trimCStyleComment(start_loc, comment);
+        Location end_loc(tokenizer.location());
+
+        // Doc constructor parses the comment.
+        Doc doc(start_loc, end_loc, comment, commands, CppCodeParser::topic_commands);
+        if (doc.topicsUsed().isEmpty()) {
+            doc.location().warning(QStringLiteral("This qdoc comment contains no topic command "
+                                                  "(e.g., '\\%1', '\\%2').")
+                                           .arg(COMMAND_MODULE, COMMAND_PAGE));
+            continue;
+        }
+
+        if (hasTooManyTopics(doc))
+            continue;
+
+        untied.emplace_back(UntiedDocumentation{doc, QStringList()});
+    }
+
+    return untied;
+}
+
+QT_END_NAMESPACE