[flang-commits] [flang] [flang][runtime] Accept '\n' as space in internal list-directed input (PR #107716)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-flang-runtime

Author: Peter Klausler (klausler)

<details>
<summary>Changes</summary>

When scanning ahead for the first character in the next input item in list-directed internal input, allow a newline character to appear and treat it as a space, matching the behavior of nearly all other Fortran compilers.

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Full diff: https://github.com/llvm/llvm-project/pull/107716.diff


1 Files Affected:

- (modified) flang/runtime/io-stmt.h (+3-2) 


``````````diff
diff --git a/flang/runtime/io-stmt.h b/flang/runtime/io-stmt.h
index d67d1ec80afcea..2e0ca46078ecdc 100644
--- a/flang/runtime/io-stmt.h
+++ b/flang/runtime/io-stmt.h
@@ -194,8 +194,9 @@ class IoStatementState {
       std::size_t &byteCount) {
     auto ch{GetCurrentChar(byteCount)};
     bool inNamelist{mutableModes().inNamelist};
-    while (!ch || *ch == ' ' || *ch == '\t' || (inNamelist && *ch == '!')) {
-      if (ch && (*ch == ' ' || *ch == '\t')) {
+    while (!ch || *ch == ' ' || *ch == '\t' || *ch == '\n' ||
+        (inNamelist && *ch == '!')) {
+      if (ch && (*ch == ' ' || *ch == '\t' || *ch == '\n')) {
         HandleRelativePosition(byteCount);
       } else if (!AdvanceRecord()) {
         return Fortran::common::nullopt;

``````````

</details>


https://github.com/llvm/llvm-project/pull/107716