Allow the parser to work with some nonstandard real value representations (leading +, no leading digit before decimal, D/d format). Fixes #417

Author: jacobwilliams

Diff for: src/json_value_module.F90

@@ -10110,16 +10110,16 @@ recursive subroutine parse_value(json, unit, str, value)
                 call json%parse_for_chars(unit, str, null_str(2:))
                 if (.not. json%exception_thrown) call json%to_null(value) ! allocate class
 
-            case(CK_'-', CK_'0': CK_'9')
+            case(CK_'-', CK_'0': CK_'9', CK_'.', CK_'+')
 
                 call json%push_char(c)
                 call json%parse_number(unit, str, value)
 
             case default
 
                 call json%throw_exception('Error in parse_value:'//&
-                                     ' Unexpected character while parsing value. "'//&
-                                     c//'"')
+                                          ' Unexpected character while parsing value. "'//&
+                                          c//'"')
 
             end select
         end if
@@ -11132,7 +11132,7 @@ subroutine parse_number(json, unit, str, value)
                 tmp(ip:ip) = c
                 ip = ip + 1
 
-            case(CK_'.',CK_'E',CK_'e')    !can be present in real numbers
+            case(CK_'.',CK_'E',CK_'e',CK_'D',CK_'d')    !can be present in real numbers
 
                 if (is_integer) is_integer = .false.
 

Diff for: src/tests/jf_test_42.F90

@@ -23,7 +23,10 @@ subroutine test_42(error_cnt)
     type(json_file) :: json          !! the JSON structure read from the file
     integer,intent(out) :: error_cnt !! error counter
 
-    character(kind=CK,len=*),parameter :: str = CK_'{"bad_reals": [1.0, null, "NaN", "+Infinity", "-Infinity", 4.0]}'
+    character(kind=CK,len=*),parameter :: str = CK_'{'//&
+             '"bad_reals": [1.0, null, "NaN", "+Infinity", "-Infinity", 4.0],'//&
+             '"nonstandard_json": [.1e1, .1D1, .1d+1, +.1d1, +.1D1, +1.0, +1.0d0, +1.0D0]'//&
+             '}'
 
     real(rk),dimension(:),allocatable :: bad_reals
     logical(lk) :: found