leading-zero = 03.14
leading-zero-neg = -03.14
leading-zero-plus = +03.14
leading-dot = .12345
leading-dot-neg = -.12345
leading-dot-plus = +.12345
trailing-dot = 1.
trailing-dot-min = -1.
trailing-dot-plus = +1.
trailing-exp = 0.0E
trailing-exp-dot = 0.e
trailing-exp-minus = 0.0e-
trailing-exp-plus = 0.0e+
trailing-us = 1.2_
leading-us = _1.2
us-before-dot = 1_.2
us-after-dot = 1._2
double-dot-01 = 0..1
double-dot-02 = 0.1.2
exp-dot-01 = 1e2.3
exp-dot-02 = 1.e2
exp-dot-03 = 3.e+20
exp-double-e-01 = 1ee2
exp-double-e-02 = 1e2e3
exp-leading-us = 1e_23
exp-trailing-us = 1e23_
exp-double-us = 1e__23
exp-trailing-us-01 = 1_e2
exp-trailing-us-02 = 1.2_e2
inf-incomplete-01 = in
inf-incomplete-02 = +in
inf-incomplete-03 = -in
nan-incomplete-01 = na
nan-incomplete-02 = +na
nan-incomplete-03 = -na
nan_underscore = na_n
inf_underscore = in_f