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createablxorbinexpr

NAME

createablxorbinexpr - creates an 'xor' or 'xnor' operator expression.

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SYNOPSYS

 #include "abl101.h"
 chain_list *createablxorbinexpr( Oper, Expr1, Expr2 )
   long        Oper;
   chain_list *Expr1;
   chain_list *Expr2;
 

PARAMETERS

Oper

Operator ABL_XOR or ABL_NXOR.

Expr1

First expression.

Expr2

Second expression.

DESCRIPTION

createablxorbinexpr creates a binary 'xor' or 'xnor' operator expression with the 'and', 'or' form. createablbinexpr simplifies eventually the sub-expressions. The expression pointers Expr1 and Expr2 MUSTN'T be used after the call to this function.

RETURN VALUE

createablxorbinexpr returns a pointer to the new operator expression.

ERRORS

"ablcreate: bad operator xx !",

Operator must be ABL_XOR or ABL_NXOR.

EXAMPLE

 #include "abl101.h"
    chain_list *ExprA;
    chain_list *ExprB;
    chain_list *ExprAxorB;
    ExprA = createablatom( "a" );
    ExprB = createablatom( "b" );
    ExprAxorB  = createablxorbinexpr( ABL_XOR, ExprA, ExprB );
    /* displays (a and (not b) or (b and (not a)) */
    viewablexpr( ExprAxorB, ABL_VIEW_VHDL );
 

SEE ALSO

abl(1) abl(1) createablatom(3), createabloper(3), createablbinexpr(3), createablunaryexpr(3), createablnotexpr(3), addablhexpr(3), addablqexpr(3).

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