mirror of
https://github.com/polserver/polserver
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53 lines
1.6 KiB
Text
53 lines
1.6 KiB
Text
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// Format specifiers reach the same code from two directions: interpolated strings ($"{x:fmt}")
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// and the format() method, whose parameter indexes are 1-based. Only x and #x were exercised
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// before, so everything below covers b, o and d plus the three refusal strings.
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// Binary, with and without the # prefix.
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print( $"{255:b}" );
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print( $"{255:#b}" );
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print( $"{0:b}" );
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print( $"{1:b}" );
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// A negative value formats as its 32-bit two's complement. Note the sign is emitted for #b
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// only, so the b and #b forms of the same number do not agree.
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print( $"{-16:b}" );
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print( $"{-16:#b}" );
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// Octal, which prefixes but never signs.
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print( $"{8:o}" );
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print( $"{8:#o}" );
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print( $"{-8:o}" );
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print( $"{-8:#o}" );
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// Hex, for comparison with the two above.
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print( $"{48879:x}" );
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print( $"{48879:#x}" );
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print( $"{-1:x}" );
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// d takes an Integer or a Real, truncating the Real toward zero.
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print( $"{42:d}" );
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print( $"{-5:d}" );
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print( $"{3.7:d}" );
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print( $"{-3.7:d}" );
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// The three refusals: a non-Integer where one is required, a non-number for d, and an
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// unrecognised specifier.
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print( $"{1.5:b}" );
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print( $"{1.5:x}" );
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print( $"{1.5:o}" );
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print( $"{"abc":d}" );
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print( $"{5:q}" );
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// The same specifiers through format(), including a member of a struct parameter.
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print( "{1:b}".format( 255 ) );
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print( "{1:#b}".format( 255 ) );
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print( "{1:o}".format( 8 ) );
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print( "{1:#o}".format( 8 ) );
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print( "{1:d}".format( 3.9 ) );
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print( "{1:z}".format( 1 ) );
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print( "{1.n:#x}".format( struct{ n := 48879 } ) );
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// An index format() has no parameter for.
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print( "{0:b}".format( 255 ) );
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print( "{2:b}".format( 255 ) );
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