MISRA.LITERAL.SUFFIX.CASE

Literal suffix in lower case.

MISRA-C++ Rule 2-3-14 (required): Literal suffixes shall be upper case.

Rationale

Using upper case literal suffixes removes the potential ambiguity between "1" (digit 1) and "l" (letter el) for declaring literals.

Example

const uint32_t   a = 0U;
const uint32_t   b = 0u;       // Non-compliant
const int64_t    c = 0L;
const int64_t    d = 0l;       // Non-compliant
const uint64_t   e = 0UL;
const uint64_t   f = 0Ul;      // Non-compliant
const uint32_t   g = 0x12bU;
const uint32_t   h = 0x12bu;   // Non-compliant
const float32_t  m = 1.2F;
const float32_t  n = 2.4f;     // Non-compliant
const float128_t p = 1.2L;
const float128_t n = 2.4l;     // Non-compliant