Function parse_as_float

tests/fl/stl/ieee754_string.cpp:20–23

Convenience: parse a literal and reinterpret the result as a float for comparison against host strtof. The bit-cast itself does not anchor any libgcc soft-FP helper; the host `float` comparison does (cheap on host).

// comparison against host strtof. The bit-cast itself does not anchor any
// libgcc soft-FP helper; the host `float` comparison does (cheap on host).
static float parse_as_float(const char* s) {
    u32 bits = ieee754_parse_decimal(s, fl::strlen(s));
    return fl::bit_cast<float>(bits);
}

FL_TEST_CASE("ieee754_parse_decimal -- well-known constants") {
    FL_SUBCASE("zero") {