[Lldb-commits] [lldb] [LLDB] Add `ScalarLiteralNode` and literal parsing in DIL (PR #152308)

[Pavel Labath via lldb-commits]

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@@ -370,6 +374,76 @@ std::optional<int64_t> DILParser::ParseIntegerConstant() {
   return std::nullopt;
 }
 
+// Parse a numeric_literal.
+//
+//  numeric_literal:
+//    ? Token::integer_constant ?
+//    ? Token::floating_constant ?
+//
+ASTNodeUP DILParser::ParseNumericLiteral() {
+  ASTNodeUP numeric_constant;
+  if (CurToken().Is(Token::integer_constant))
+    numeric_constant = ParseIntegerLiteral();
+  else
+    numeric_constant = ParseFloatingPointLiteral();
+  if (numeric_constant->GetKind() == NodeKind::eErrorNode) {
+    BailOut(llvm::formatv("Failed to parse token as numeric-constant: {0}",
+                          CurToken()),
+            CurToken().GetLocation(), CurToken().GetSpelling().length());
+    return std::make_unique<ErrorNode>();
+  }
+  m_dil_lexer.Advance();
+  return numeric_constant;
+}
+
+ASTNodeUP DILParser::ParseIntegerLiteral() {
+  Token token = CurToken();
+  auto spelling = token.GetSpelling();
+  llvm::StringRef spelling_ref = spelling;
+
+  auto radix = llvm::getAutoSenseRadix(spelling_ref);
+  bool is_unsigned = false, is_long = false, is_longlong = false;
+  if (spelling_ref.consume_back_insensitive("u"))
+    is_unsigned = true;
+  if (spelling_ref.consume_back_insensitive("ll"))
+    is_longlong = true;
+  if (spelling_ref.consume_back_insensitive("l"))
+    is_long = true;
+  // Suffix 'u' can be only specified only once, before or after 'l'
+  if (!is_unsigned && spelling_ref.consume_back_insensitive("u"))
+    is_unsigned = true;
+
+  llvm::APInt raw_value;
+  if (!spelling_ref.getAsInteger(radix, raw_value)) {
+    Scalar scalar_value(raw_value);
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labath wrote:

unused

https://github.com/llvm/llvm-project/pull/152308