Alessandro Bonazzi
e075990ed3
Files correlati : Commento : Aggiunto il preprocessore c++ mcpp per sostituire il compilatore nella compilazione delle maschere.
36 lines
1010 B
Raku
36 lines
1010 B
Raku
/* n_25.t: Macro arguments are pre-expanded (unless the argument is an
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operand of # or ## operator) separately, that is, are macro-replaced
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completely prior to rescanning. */
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#define MACRO_0 0
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#define MACRO_1 1
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#define ZERO_TOKEN
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#define TWO_ARGS a,b
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#define sub( x, y) (x - y)
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#define glue( a, b) a ## b
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#define xglue( a, b) glue( a, b)
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#define str( a) # a
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/* 25.1: "TWO_ARGS" is read as one argument to "sub" then expanded to
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"a,b", then "x" is substituted by "a,b". */
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/* (a,b - 1); */
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sub( TWO_ARGS, 1);
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/* 25.2: An argument pre-expanded to 0-token. */
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/* ( - 1); */
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sub( ZERO_TOKEN, 1);
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/* 25.3: "glue( a, b)" is pre-expanded. */
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/* abc; */
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xglue( glue( a, b), c);
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/* 25.4: Operands of ## operator are not pre-expanded. */
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/* MACRO_0MACRO_1; */
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glue( MACRO_0, MACRO_1);
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/* 25.5: Operand of # operator is not pre-expanded. */
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/* "ZERO_TOKEN"; */
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#define ZERO_TOKEN
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str( ZERO_TOKEN);
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