[PATCH] D89722: SourceManager: Simplify early returns in ContentCache::getBufferOrNone, NFC
Duncan P. N. Exon Smith via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Mon Oct 19 12:29:37 PDT 2020
dexonsmith created this revision.
dexonsmith added a reviewer: JDevlieghere.
Herald added a subscriber: ributzka.
dexonsmith requested review of this revision.
As suggested in the review for https://reviews.llvm.org/D89430, simplify
the logic for marking the buffer as invalid in the early return paths.
https://reviews.llvm.org/D89722
Files:
clang/lib/Basic/SourceManager.cpp
Index: clang/lib/Basic/SourceManager.cpp
===================================================================
--- clang/lib/Basic/SourceManager.cpp
+++ clang/lib/Basic/SourceManager.cpp
@@ -111,6 +111,10 @@
if (!ContentsEntry)
return None;
+ // Start with the assumption that the buffer is invalid to simplify early
+ // return paths.
+ IsBufferInvalid = true;
+
// Check that the file's size fits in an 'unsigned' (with room for a
// past-the-end value). This is deeply regrettable, but various parts of
// Clang (including elsewhere in this file!) use 'unsigned' to represent file
@@ -125,7 +129,6 @@
Diag.Report(Loc, diag::err_file_too_large)
<< ContentsEntry->getName();
- IsBufferInvalid = true;
return None;
}
@@ -145,7 +148,6 @@
Diag.Report(Loc, diag::err_cannot_open_file)
<< ContentsEntry->getName() << BufferOrError.getError().message();
- IsBufferInvalid = true;
return None;
}
@@ -161,7 +163,6 @@
Diag.Report(Loc, diag::err_file_modified)
<< ContentsEntry->getName();
- IsBufferInvalid = true;
return None;
}
@@ -174,10 +175,11 @@
if (InvalidBOM) {
Diag.Report(Loc, diag::err_unsupported_bom)
<< InvalidBOM << ContentsEntry->getName();
- IsBufferInvalid = true;
return None;
}
+ // Buffer has been validated.
+ IsBufferInvalid = false;
return Buffer->getMemBufferRef();
}
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