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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Literals-Floating-point/Verbexx/literals-floating-point.verbexx Normal file
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// Floating-point Literals:
//
// If present,the exponent must be of the form:
//
// eNNN...N
// ENNN...N
// e-NNN...N
// E-NNN...N
// e+NNN...N
// E+NNN...N
//
// If present, length suffix must be:
//
// f F (FLOAT64_T)
// f32 F32 (FLOAT32_T)
// f64 F64 (FLOAT64_T)
// fd Fd fD FD (FLOATD_T) -- boost::multiprecision::
// cpp_dec_float<100, int64_t>
//
// The presence of "." "E" "e" "F" or "f" indicates a floating point literal.
//
// A literal can start with "-" "." or a decimal digit, but not "+" or "_".
// There must be at least one digit, so forms like ".F" ".e+11_f32" or just "."
// are not recognized as floating point literals.
//
// Floating-point literal examples:
@SAY 0. .0 0.0 1. .1 123.123 ;// FLOAT64_T
@SAY -0. -.0 -0.0 -1. -.1 -123.123 ;// FLOAT64_T
@SAY -0.E1 .0e0 0.0E6 -1.e6 -.1E8 12.12e44 -0E0 1e20 ;// FLOAT64_T
@SAY -0.e+1 .0E+0 0.0e+6 -1.E+6 -.1e+8 12.12E+44 -0e+0 1E+20 ;// FLOAT64_T
@SAY -0.E-1 .0e-0 0.0E-6 -1.e-6 -.1E-8 12.12e-44 -0E-0 1e-20 ;// FLOAT64_T
@SAY -0E9999999999999999 .0e+9999999999 0.E-999999999999999999 ;// FLOAT64_T
@SAY -8e0000000000000299 .6E+0000000299 5.e-000000000000000299 ;// FLOAT64_T
@SAY 0f -0f 0F -0f .0F -1234f 12.F 12.34f ;// FLOAT64_T
@SAY 0F32 -0f32 0f32 -0f32 .0f32 -1234F32 12.f32 12.34F32 ;// FLOAT32_T
@SAY 0f64 -0f64 0F64 -0f64 .0F64 -1234f64 12.F64 12.34f64 ;// FLOAT64_T
@SAY 0fD -0fd 0FD -0fd .0Fd -1234fD 12.FD 12.34fD ;// FLOATD_T
@SAY -0.E1f .0e0F 0.0E6f64 -1.e6F64 -.1E8f 12.12e44f64 -0E0F 1e20f64 ;// FLOAT64_T
@SAY -0.e+1f32 .0E+0F32 0.0e+6f32 -1.E+6F32 -.1e+8f32 12.12E+34F32 -0e+0f32 1E+20F32;// FLOAT32_T
@SAY -0.E-1fd .0e-0fD 0.0E-6Fd -1.e-6FD -.1E-8fd 12.12e-44fD -0E-0Fd 1e-20FD ;// FLOATD_T
@SAY -0E9999999999999999f32 .0e+9999999999F32 0.E-999999999999999999f32 ;// FLOAT32_T
@SAY -8e0000000000000299f .6E+0000000299f64 5.e-00000000000000000000299F64 ;// FLOAT64_T
@SAY -8e9999999999999999fD .6E+99999999999fD 5.e-12345678987654321FD ;// FLOATD_T
// note: _ (underscores) can appear in the main numeric part of the literal
// after the first digit and before any length suffix:
@SAY -10_000__f 1__0._55__ -1__.__ .0___44 1_._2__E-23F32 debug:;
// Underscores can also appear in the exponent, after the first digit:
@SAY -1_E-0__2_f32 1.e+0___5_5____ -1.0_E123_456_789_987_654_321__fD debug:;