How can I remove C style casting in rtwtypes.h

When I generate autocode, a rtwtypes.h file is produced that contains the following code:

//=======================================================================*

// Min and Max: *

// int8_T, int16_T, int32_T - signed 8, 16, or 32 bit integers *

// uint8_T, uint16_T, uint32_T - unsigned 8, 16, or 32 bit integers *

// =======================================================================

#define MAX_int8_T ((int8_T)(127))

#define MIN_int8_T ((int8_T)(-128))

#define MAX_uint8_T ((uint8_T)(255U))

#define MAX_int16_T ((int16_T)(32767))

#define MIN_int16_T ((int16_T)(-32768))

#define MAX_uint16_T ((uint16_T)(65535U))

#define MAX_int32_T ((int32_T)(2147483647))

#define MIN_int32_T ((int32_T)(-2147483647-1))

#define MAX_uint32_T ((uint32_T)(0xFFFFFFFFU))

Compiler warning are thrown about this code, which look like "warning: use of old-style cast to uint32_T...". Is there an option for the above code to be generated so it looks like:

#define MAX_int8_T static_cast<uint8_T>(127)

Answer 1

[Umar]

Hi @Troy,

I checked the MathWorks documentation, and it looks like there isn’t a built-in way to generate *rtwtypes.h` using `static_cast<>*. The file is intentionally C-compatible, so it uses traditional C-style casts like (int8_T)(127) to ensure it works across compilers and platforms.

There are a few ways people handle the compiler warnings:

1. Suppress the warning for that header file—most compilers let you disable “old-style cast” warnings selectively.

2. Wrap the include with pragmas that temporarily disable the warning.

3. Manually edit `rtwtypes.h` to use `static_cast<>`, but you’d need to redo this every time the code is regenerated.

The cleanest approach in a workflow that regenerates code often ends up being either warning suppression or using pragmas, so you don’t have to maintain a custom header.

Keep me posted if you made any progress.