From cdb627a516ae4d84554b603450b899651e798847 Mon Sep 17 00:00:00 2001
From: AnotherTest <ali.mpfard@gmail.com>
Date: Sun, 5 Apr 2020 16:19:25 +0430
Subject: [PATCH] LibJS: Allow lexer to run without logging errors

---
 Libraries/LibJS/Lexer.cpp | 3 ++-
 Libraries/LibJS/Lexer.h   | 7 +++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/Libraries/LibJS/Lexer.cpp b/Libraries/LibJS/Lexer.cpp
index 1cf08bd29d..b29bef244d 100644
--- a/Libraries/LibJS/Lexer.cpp
+++ b/Libraries/LibJS/Lexer.cpp
@@ -204,7 +204,8 @@ bool Lexer::is_numeric_literal_start() const
 void Lexer::syntax_error(const char* msg)
 {
     m_has_errors = true;
-    fprintf(stderr, "Syntax Error: %s (line: %zu, column: %zu)\n", msg, m_line_number, m_line_column);
+    if (m_log_errors)
+        fprintf(stderr, "Syntax Error: %s (line: %zu, column: %zu)\n", msg, m_line_number, m_line_column);
 }
 
 Token Lexer::next()
diff --git a/Libraries/LibJS/Lexer.h b/Libraries/LibJS/Lexer.h
index eb1564b280..e896d3ca2a 100644
--- a/Libraries/LibJS/Lexer.h
+++ b/Libraries/LibJS/Lexer.h
@@ -37,6 +37,12 @@ namespace JS {
 class Lexer {
 public:
     explicit Lexer(StringView source);
+    Lexer(StringView source, bool log_errors)
+        : Lexer(source)
+    {
+        m_log_errors = log_errors;
+    }
+
     Token next();
     bool has_errors() const { return m_has_errors; }
 
@@ -60,6 +66,7 @@ private:
     bool m_has_errors = false;
     size_t m_line_number = 1;
     size_t m_line_column = 1;
+    bool m_log_errors = true;
 
     static HashMap<String, TokenType> s_keywords;
     static HashMap<String, TokenType> s_three_char_tokens;