read_verilog <<EOT
module top(input a, b, output [5:0] y);
and (y[0], a, b);
nand (y[1], a, b);
or (y[2], a, b);
nor (y[3], a, b);
xor (y[4], a, b);
xnor (y[5], a, b);
endmodule
EOT
select -assert-count 1 t:$and a:src=<<EOT:2.4-2.17 %i
select -assert-count 1 t:$and a:src=<<EOT:3.5-3.18 %i
select -assert-count 1 t:$or a:src=<<EOT:4.3-4.16 %i
select -assert-count 1 t:$or a:src=<<EOT:5.4-5.17 %i
select -assert-count 1 t:$xor a:src=<<EOT:6.4-6.17 %i
select -assert-count 1 t:$xor a:src=<<EOT:7.5-7.18 %i