LibCpp: Use lex_iterable() where applicable

Userland/Libraries/LibCpp/Preprocessor.cpp

@@ -244,13 +244,13 @@ size_t Preprocessor::do_substitution(Vector<Token> const& tokens, size_t token_i
     m_substitutions.append({ original_tokens, defined_value, processed_value });
 
     Lexer lexer(processed_value);
-    for (auto& token : lexer.lex()) {
+    lexer.lex_iterable([&](auto token) {
         if (token.type() == Token::Type::Whitespace)
-            continue;
+            return;
         token.set_start(original_tokens.first().start());
         token.set_end(original_tokens.first().end());
         m_processed_tokens.append(token);
-    }
+    });
     return macro_call->end_token_index;
 }
 
@@ -363,26 +363,25 @@ String Preprocessor::evaluate_macro_call(MacroCall const& macro_call, Definition
     }
 
     Lexer lexer { definition.value };
-    auto tokens = lexer.lex();
-
     StringBuilder processed_value;
-    for (auto& token : tokens) {
+    lexer.lex_iterable([&](auto token) {
         if (token.type() != Token::Type::Identifier) {
             processed_value.append(token.text());
-            continue;
+            return;
         }
 
         auto param_index = definition.parameters.find_first_index(token.text());
         if (!param_index.has_value()) {
             processed_value.append(token.text());
-            continue;
+            return;
         }
 
         auto& argument = macro_call.arguments[*param_index];
         for (auto& arg_token : argument.tokens) {
             processed_value.append(arg_token.text());
         }
-    }
+    });
+
     return processed_value.to_string();
 }
 

Userland/Libraries/LibCpp/SyntaxHighlighter.cpp

@@ -59,10 +59,9 @@ void SyntaxHighlighter::rehighlight(Palette const& palette)
 {
     auto text = m_client->get_text();
     Cpp::Lexer lexer(text);
-    auto tokens = lexer.lex();
 
     Vector<GUI::TextDocumentSpan> spans;
-    for (auto& token : tokens) {
+    lexer.lex_iterable([&](auto token) {
         // FIXME: The +1 for the token end column is a quick hack due to not wanting to modify the lexer (which is also used by the parser). Maybe there's a better way to do this.
         dbgln_if(SYNTAX_HIGHLIGHTING_DEBUG, "{} @ {}:{} - {}:{}", token.type_as_string(), token.start().line, token.start().column, token.end().line, token.end().column + 1);
         GUI::TextDocumentSpan span;
@@ -74,7 +73,7 @@ void SyntaxHighlighter::rehighlight(Palette const& palette)
         span.is_skippable = token.type() == Cpp::Token::Type::Whitespace;
         span.data = static_cast<u64>(token.type());
         spans.append(span);
-    }
+    });
     m_client->do_set_spans(move(spans));
 
     m_has_brace_buddies = false;

Userland/Utilities/cpp-lexer.cpp

@@ -24,9 +24,7 @@ int main(int argc, char** argv)
     StringView content_view(content);
 
     Cpp::Lexer lexer(content);
-    auto tokens = lexer.lex();
+    lexer.lex_iterable([](auto token) {
-
-    for (auto& token : tokens) {
         outln("{}", token.to_string());
-    }
+    });
 }