diff --git a/default.config b/default.config
index 6773143..8a2fae2 100644
--- a/default.config
+++ b/default.config
@@ -80,7 +80,7 @@ case "$TASK" in
         ;;
     # creates executable with debug info and no optimizations
     build_exec_dbg)
-        C_ARGS="-O0 -g"
+        C_ARGS="-O0 -g -DDEBUG=1"
         CPP_ARGS="$C_ARGS"
         LINKER_ARGS="$CPP_ARGS $LINKER_LIBS"
         PRE_TASK_SCRIPT=tasks/pre_build.sh
diff --git a/src/UsefulException.hpp b/src/UsefulException.hpp
index 25b4217..ae6f668 100644
--- a/src/UsefulException.hpp
+++ b/src/UsefulException.hpp
@@ -17,3 +17,11 @@ public:
 
     virtual char const* what() const noexcept;
 };
+
+#if DEBUG == 1
+/// Use this macro to find bugs in debug build. Release build could be compiled without asserts. Define DEBUG=1 to enable assert compilation.
+    #define assert(EXPR, ERRMSG) if(!EXPR) throw UsefulException(ERRMSG);
+#else
+/// Use this macro to find bugs in debug build. Release build could be compiled without asserts. Define DEBUG=1 to enable assert compilation.
+    #define assert(EXPR, ERRMSG) EXPR
+#endif
diff --git a/src/format.cpp b/src/format.cpp
index 4e0f47d..15c05fc 100644
--- a/src/format.cpp
+++ b/src/format.cpp
@@ -4,7 +4,7 @@
 #include "UsefulException.hpp"
 #include "../dependencies/kerep/src/base/base.h"
 
-std::string format(const std::string format_str, size_t args_count, ...){
+std::string _format(const std::string format_str, size_t args_count, ...){
     va_list vl;
     va_start(vl, args_count);
     std::stringstream ss;
diff --git a/src/format.hpp b/src/format.hpp
index 5432382..acb41f6 100644
--- a/src/format.hpp
+++ b/src/format.hpp
@@ -1,5 +1,7 @@
 #pragma once
 
 #include <string>
+#include "../dependencies/kerep/src/base/std.h"
 
-std::string format(const std::string format_str, size_t args_count, ...);
+std::string _format(const std::string format_str, size_t args_count, ...);
+#define format(FORMAT_STR, ARGS...) _format(FORMAT_STR, count_args(ARGS) ,##ARGS)