ngspice/examples/control_structs/if-test-1.cir

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test if conditions
* test behaviour in special circumstances
v1 1 0 dc 42
R1 1 0 1k
.control
echo "expect Error: missing if condition"
* does not enter cp_istrue()
if
echo "FAIL: you should not see this"
else
echo "nonetheless evaluated as FALSE"
end
echo
set testvar_b=""
echo "expect |false|"
* in cp_istrue(): wl!=NULL names==NULL v==NULL
if $testvar_b
echo "FAIL: you should not see this"
else
echo "|false|"
end
echo
set testvar_c
echo "expect testvar_c=|TRUE|"
* in cp_istrue(): wl!=NULL names!=NULL v!=NULL
if $testvar_c
echo "testvar_c=|$testvar_c|"
end
echo
echo "expect Error: testvar_d: no such variable."
* in cp_istrue(): wl!=NULL then wl==NULL names==NULL v==NULL
if $testvar_d
echo "FAIL: you should not see this"
else
echo "nonetheless evaluated as FALSE"
end
echo
echo "expect Error(parse.c--checkvalid): testvar_e: no such vector."
* in cp_istrue(): wl!=NULL names==NULL v==NULL
if testvar_e = 3.3
echo "FAIL: you should not see this"
else
echo "nonetheless evaluated as FALSE"
end
echo
let testvar_f = 3.5
echo "expect |false|"
if testvar_f = 3.3
echo "FAIL: you should not see this"
else
echo "|false|"
end
echo
echo "expect |true|"
if testvar_f = 3.5
echo "|true|"
else
echo "FAIL: you should not see this"
end
echo
op
print v(1)
.endc
.end