fix validation of ints with leading unary plus (#1272)

Author: cknv

src/input/shared.rs

@@ -114,6 +114,9 @@ fn clean_int_str(mut s: &str) -> Option<Cow<str>> {
     // strip leading and trailing whitespace
     s = s.trim();
 
+    // strip leading unary plus
+    s = s.strip_prefix('+').unwrap_or(s);
+
     // strip loading zeros
     s = strip_leading_zeros(s)?;
 

tests/validators/test_int.py

@@ -23,6 +23,10 @@
         ('00', 0),
         ('000', 0),
         ('0_000', 0),
+        ('+0', 0),
+        ('+00', 0),
+        ('+000', 0),
+        ('+0_000', 0),
         (1, 1),
         ('  1  ', 1),
         (42, 42),
@@ -39,6 +43,12 @@
         ('00_', Err('Input should be a valid integer, unable to parse string as an integer')),
         # next character after 9 is not valid
         ('0:', Err('Input should be a valid integer, unable to parse string as an integer')),
+        ('+4_2', 42),
+        ('+0_42', 42),
+        ('+4_2.0', 42),
+        ('+04_2.0', 42),
+        ('++4_2', Err('Input should be a valid integer, unable to parse string as an integer')),
+        ('+-1', Err('Input should be a valid integer, unable to parse string as an integer')),
         ('4_2', 42),
         ('0_42', 42),
         ('4_2.0', 42),