[flang] Remove macro replacement in angular bracket includes

[elmcdonough]

Summary

Addresses Github issue #60317.

[clementval]

flang/lib/Parser/preprocessor.cpp

602

clang-fromat issue here.

flang/test/Preprocessing/preserve-brace-include.F90

4

You should check the output with FileCheck.

[klausler]

flang/lib/Parser/preprocessor.cpp

602

Don't retain the old bad line in a comment.

[elmcdonough]

I fixed the formatting and test.

[klausler]

Please coordinate with https://reviews.llvm.org/D143606

[pscoro]

In D143469#4113928, @klausler wrote:

Please coordinate with https://reviews.llvm.org/D143606

Closed mine, was identical minus test case. There was no assignee on the github issue

[elmcdonough]

Ping

flang/lib/Parser/preprocessor.cpp

if (dir.TokenAt(j).ToString() == "<") { // #include <foo>
       while (k < tokens && dir.TokenAt(k) != ">") {
         ++k;
       }
       if (k >= tokens) {
         prescanner.Say(dir.GetIntervalProvenanceRange(j, tokens - j),
             "#include: expected '>' at end of included file"_port_en_US);
       }
       TokenSequence braced{dir, j + 1, k - j - 1};
-      include = ReplaceMacros(braced, prescanner).ToString();
+      include = braced.ToString();//ReplaceMacros(braced, prescanner).ToString();
       j = k;
     } else if ((include = dir.TokenAt(j).ToString()).substr(0, 1) == "\"" &&
         include.substr(include.size() - 1, 1) == "\"") { // #include "foo"
       include = include.substr(1, include.size() - 2);
       // #include "foo" starts search in directory of file containing
       // the directive
       auto prov{dir.GetTokenProvenanceRange(dirOffset).start()};
       if (const auto *currentFile{allSources_.GetSourceFile(prov)}) {

flang/test/Preprocessing/preserve-brace-include.F90

+! RUN: %flang -E -I%S %s
+
+#define empty ERR_NONEXISTENT
+#include <empty.h>