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lsym_unary_op.c revision 1.5 
      1 /* $NetBSD: lsym_unary_op.c,v 1.5 2022/04/24 10:36:37 rillig Exp $ */
      2 
      3 /*
      4  * Tests for the token lsym_unary_op, which represents a unary operator.
      5  *
      6  * In an expression, a unary operator is written without blank next to its
      7  * argument.
      8  *
      9  * In a type name, the "unary operator" '*' represents the derivation of a
     10  * pointer type.
     11  */
     12 
     13 //indent input
     14 void
     15 unary_operators(void)
     16 {
     17 	/* In the order of appearance in C11 6.5. */
     18 	function(a++, a--, ++a, --a, &a, *a, +a, -a, ~a, !a);
     19 }
     20 //indent end
     21 
     22 //indent run-equals-input
     23 
     24 
     25 /*
     26  * The unary operators '+' and '-' can occur in long chains.  In these chains,
     27  * adjacent '+' must not be merged to '++' since that would be a different
     28  * token.  The same applies to '&', but that case is irrelevant in practice
     29  * since the address of an address cannot be taken.
     30  */
     31 //indent input
     32 int var=+3;
     33 int mixed=+-+-+-+-+-+-+-+-+-+-+-+-+-3;
     34 int count=~-~-~-~-~-~-~-~-~-~-~-~-~-3;
     35 int same = + + + + + - - - - - 3;
     36 //indent end
     37 
     38 //indent run -di0
     39 int var = +3;
     40 int mixed = +-+-+-+-+-+-+-+-+-+-+-+-+-3;
     41 int count = ~-~-~-~-~-~-~-~-~-~-~-~-~-3;
     42 int same = + + + + +- - - - -3;
     43 //indent end
     44 
     45 
     46 /*
     47  * A special kind of unary operator is '->', which additionally suppresses the
     48  * next space.
     49  */
     50 //indent input
     51 int var = p -> member;
     52 //indent end
     53 
     54 //indent run -di0
     55 int var = p->member;
     56 //indent end
     57