29 input ::= exprline(B). {
30   ctx->val.bo = ssi_val_tobool(B);
33   ssi_val_free(B);
36 exprline(A) ::= expr(B) cond(C) expr(D). {  in exprline()
39   if (B->type == SSI_TYPE_STRING &&  in exprline()
41        cmp = strcmp(B->str->ptr, D->str->ptr);  in exprline()
43     cmp = ssi_val_tobool(B) - ssi_val_tobool(D);  in exprline()
46   A = B;  in exprline()
61 exprline(A) ::= expr(B). {  in exprline()
62   A = B;  in exprline()
64 expr(A) ::= expr(B) AND expr(C). {  in expr()
67   e = ssi_val_tobool(B) && ssi_val_tobool(C);  in expr()
69   A = B;  in expr()
75 expr(A) ::= expr(B) OR expr(C). {  in expr()
78   e = ssi_val_tobool(B) || ssi_val_tobool(C);  in expr()
80   A = B;  in expr()
86 expr(A) ::= NOT expr(B). {  in expr()
89   e = !ssi_val_tobool(B);  in expr()
91   A = B;  in expr()
95 expr(A) ::= LPARAN exprline(B) RPARAN. {  in expr()
96   A = B;  in expr()
99 expr(A) ::= value(B). {  in expr()
101   A->str = B;  in expr()
105 value(A) ::= VALUE(B). {  in value()
106   A = B;  in value()
109 value(A) ::= value(B) VALUE(C). {  in value()
110   A = B;  in value()