[cling] Support bare # in input line: (#14109)

fixes #11190. Co-authored-by: Devajith Valaparambil Sreeramaswamy <[email protected]>
root-project · Jan 25, 2024 · 88c66eb · 88c66eb
1 parent 32437e0
commit 88c66eb
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Showing 3 changed files with 18 additions and 6 deletions.
diff --git a/interpreter/cling/lib/MetaProcessor/InputValidator.cpp b/interpreter/cling/lib/MetaProcessor/InputValidator.cpp
@@ -82,17 +82,19 @@ namespace cling {
       case tok::hash:
         Lex.SkipWhitespace();
         Lex.LexAnyString(Tok);
-        const llvm::StringRef PPtk = Tok.getIdent();
-        if (PPtk.startswith("if")) {
-          m_ParenStack.push_back(tok::hash);
-        } else if (PPtk.startswith("endif") &&
-                   (PPtk.size() == 5 || PPtk[5]=='/' || isspace(PPtk[5]))) {
+        if (Tok.isNot(tok::eof)) {
+          const llvm::StringRef PPtk = Tok.getIdent();
+          if (PPtk.startswith("if")) {
+            m_ParenStack.push_back(tok::hash);
+          } else if (PPtk.startswith("endif") &&
+                     (PPtk.size() == 5 || PPtk[5] == '/' || isspace(PPtk[5]))) {
             if (m_ParenStack.empty() || m_ParenStack.back() != tok::hash)
               Res = kMismatch;
             else
               m_ParenStack.pop_back();
+          }
+          break;
         }
-        break;
       }
     } while (Tok.isNot(tok::eof) && Res != kMismatch);
 

diff --git a/interpreter/cling/lib/MetaProcessor/MetaLexer.cpp b/interpreter/cling/lib/MetaProcessor/MetaLexer.cpp
@@ -102,6 +102,13 @@ namespace cling {
   void MetaLexer::LexAnyString(Token& Tok) {
     Tok.startToken(curPos);
     // consume until we reach one of the "AnyString" delimiters or EOF.
+    if (*curPos == '\0') {
+      Tok.setBufStart(curPos);
+      Tok.setKind(tok::eof);
+      Tok.setLength(0);
+      return;
+    }
+
     while(*curPos != ' ' && *curPos != '\t' && *curPos != '\0') {
       curPos++;
     }

diff --git a/interpreter/cling/test/Prompt/MetaProcessor/InputValidator.C b/interpreter/cling/test/Prompt/MetaProcessor/InputValidator.C
@@ -6,6 +6,7 @@
 // LICENSE.TXT for details.
 //------------------------------------------------------------------------------
 
+// clang-format off
 // RUN: cat %s | %cling | FileCheck %s
 "simple"
 //CHECK: (const char[7]) "simple"
@@ -17,4 +18,6 @@
 //CHECK: (const char[24]) "http://foo/bar/whatever"
 ("http://foo.bar/whatever")
 //CHECK: (const char[24]) "http://foo.bar/whatever"
+#
+// CHECK-EMPTY:
 .q