adding tests

add base check for uint8

.github/workflows/s390x.yml

@@ -24,7 +24,7 @@ jobs:
             apt-get update -q -y
             apt-get install -y cmake make g++
           run: |
-            cmake -DCMAKE_BUILD_TYPE=Release -B build
+            cmake -DCMAKE_BUILD_TYPE=Release -B build  -DFASTFLOAT_TEST=ON
             cmake --build build -j=2
             ctest --output-on-failure --test-dir build
 

include/fast_float/ascii_number.h

@@ -515,6 +515,7 @@ parse_int_string(UC const *p, UC const *pend, T &value,
   UC const *const start_digits = p;
 
   FASTFLOAT_IF_CONSTEXPR17((std::is_same<T, std::uint8_t>::value)) {
+    if (base == 10) {
       const size_t len = (size_t)(pend - p);
       if (len == 0) {
         if (has_leading_zeros) {
@@ -603,6 +604,7 @@ parse_int_string(UC const *p, UC const *pend, T &value,
       answer.ptr = p + nd;
       return answer;
     }
+  }
 
   uint64_t i = 0;
   if (base == 10) {