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1; 10; 999; 0; 00; 000
1; 1_0; 9_9_9; 0; 0_0; 0_0_0
0D1; 0d10; 0D999; 0d0; 0D00; 0d000; 0d008
0D1; 0d1_0; 0D9_9_9; 0d0; 0D0_0; 0d0_0_0; 0D0_0_8
0b0; 0B11; 0B000; 0b010
0b0; 0B1_1; 0B0_00; 0b01_0
077; 0O0; 0o01; 0O777; 0o644
0_7_7; 0O0; 0o0_1; 0O77_7; 0o6_44
0x0; 0Xa0; 0X7FFF; 0xd3aD
0x0; 0Xa_0; 0X7F_FF; 0xd3_aD
4.2; 4.20; 88.0; 13.37
4.2; 4.2_0; 8_8.0; 1_3.3_7
0e10; 0.00e+10; 9e-10; 4.2E10; 40.0E+10; 0e100; 1010e+10
0e1_0; 0.0_0e+10; 9e-1_0; 4.2E1_0; 4_0.0E+1_0; 0e1_0_0; 10_10e+10
100r; 077r; 4.2r; 4.20r; 88.0r; 13.37r; 0d800r; 0B100r; 0o700r; 0XaB_cr
1_00r; 0_7_7r; 4.2r; 4.2_0r; 88.0r; 1_3.3_7r; 0d8_0_0r; 0B1_00r; 0o70_0r; 0XaB_cr
0i; 00i; 000i; 1234i; 077i; 0d08i; 0B11i; 0o77i; 13.37i
0i; 0_0i; 0_0_0i; 12_34i; 0_77i; 0d0_8i; 0B1_1i; 0o7_7i; 13.3_7i
1e100i; 13.37e08i; 13.37E-07i; 13.37e+09i
1e1_0_0i; 1_3.3_7e0_8i; 1_3.3_7E-07i; 13.37e+0_9i
100ri; 077ri; 4.2ri; 4.20ri; 88.0ri; 13.37ri; 0d800ri; 0B100ri; 0o700ri; 0XaB_cri
1_00ri; 0_7_7ri; 4.2ri; 4.2_0ri; 88.0ri; 1_3.3_7ri; 0d8_0_0ri; 0B1_00ri; 0o70_0ri; 0XaB_cri
# expressions containing numeric literals
0..7; 1e1..2e1; 0b0.to_s
# pseudo-expressions containing numeric literals
0d100.0
.0
0.
00.0
# invalid pseudo-numeric expressions
1__0
1e_1
1e1r
08
07e1
0b1e1
0I
0R
0ir
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