fonttools/Tests/feaLib/data/lookup.fea

# Three features. In the output, they should all point to the same lookup.

lookup SomeLookup {
    sub f f i by f_f_i;
    sub f i by f_i;
} SomeLookup;

feature tst1 {
    lookup SomeLookup;
} tst1;

feature tst2 {
    lookup SomeLookup;
} tst2;

feature tst3 {
    lookup EmbeddedLookup {
        sub A by A.sc;
    } EmbeddedLookup;
} tst3;

feature tst4 {
    lookup EmbeddedLookup;
} tst4;