Timm =?utf-8?q?Bäder?= <tbae...@redhat.com>,
Timm =?utf-8?q?Bäder?= <tbae...@redhat.com>
Message-ID:
In-Reply-To: <llvm/llvm-project/pull/66514/cl...@github.com>
================
@@ -0,0 +1,77 @@
+
+#include "clang/Frontend/CodeSnippetHighlighter.h"
+#include "clang/Basic/DiagnosticOptions.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Lex/Lexer.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Lex/PreprocessorOptions.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace clang;
+
+static SourceManager createTempSourceManager() {
+ FileSystemOptions FileOpts;
+ FileManager FileMgr(FileOpts);
+ llvm::IntrusiveRefCntPtr<DiagnosticIDs> DiagIDs(new DiagnosticIDs());
+ llvm::IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts(new
DiagnosticOptions());
+ DiagnosticsEngine diags(DiagIDs, DiagOpts);
+ return SourceManager(diags, FileMgr);
+}
+
+static Lexer createTempLexer(llvm::MemoryBufferRef B, SourceManager &FakeSM,
+ const LangOptions &LangOpts) {
+ return Lexer(FakeSM.createFileID(B), B, FakeSM, LangOpts);
+}
+
+std::vector<StyleRange> CodeSnippetHighlighter::highlightLine(
+ StringRef SourceLine, const Preprocessor *PP, const LangOptions &LangOpts)
{
+ if (!PP)
+ return {};
+ constexpr raw_ostream::Colors CommentColor = raw_ostream::BLACK;
+ constexpr raw_ostream::Colors LiteralColor = raw_ostream::GREEN;
+ constexpr raw_ostream::Colors KeywordColor = raw_ostream::YELLOW;
+
+ SourceManager FakeSM = createTempSourceManager();
+ const auto MemBuf = llvm::MemoryBuffer::getMemBuffer(SourceLine);
+ Lexer L = createTempLexer(MemBuf->getMemBufferRef(), FakeSM, LangOpts);
+ L.SetKeepWhitespaceMode(true);
----------------
cor3ntin wrote:
I can think of 3 cases: line splicing, multi-line comments, raw strings.
- Line splicing are easy enough to find.
- There are very few places that will warn/error about the content of multi
line comments, and we could have a "stop coloring" RAII object for the places
that do.
- There is the interesting case of comments ending on a line. maybe we need to
search for `*/` before lexing?
- If the comment begin on the line... i guess we have to lex not just the line
but everything after.
So that left us with raw strings.
How reasonable would it be for the lexer to maintain a list of SourceRange for
raw strings?
https://github.com/llvm/llvm-project/pull/66514
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