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Diffstat (limited to 'rational.c')
| -rw-r--r-- | rational.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/rational.c b/rational.c index a78b3202ec..e5992ed76f 100644 --- a/rational.c +++ b/rational.c @@ -571,6 +571,18 @@ f_rational_new_no_reduce2(VALUE klass, VALUE x, VALUE y) * * Rational(1, 2) #=> (1/2) * Rational('1/2') #=> (1/2) + * + * Syntax of string form: + * + * rational = [ sign ] , unsigned rational ; + * unsigned rational = numerator | numerator , "/" , denominator ; + * numerator = integer part | fractional part | integer part , fractional part ; + * denominator = digits ; + * integer part = digits ; + * fractional part = "." , digits , [ ( "e" | "E" ) , [ sign ] , digits ] ; + * sign = "-" | "+" ; + * digits = digit , [ { digit | "_" , digit } ] ; + * digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ; */ static VALUE nurat_f_rational(int argc, VALUE *argv, VALUE klass) |