What kind of type does plcontainer support?

[gfphoenix78]

What kind of input type does plcontainer support?
Like:

CREATE FUNCTION pylog100(i integer) RETURNS double precision AS $$
# container: plc_python_shared
import math
return math.log10(i)
$$ LANGUAGE plcontainer;

CREATE FUNCTION pylog100(i integer[]) RETURNS double precision AS $$
# container: plc_python_shared
import math
...
return x
$$ LANGUAGE plcontainer;

CREATE FUNCTION pylog100(i integer[][]) RETURNS double precision AS $$
# container: plc_python_shared
import math
...
return x
$$ LANGUAGE plcontainer;

What kind of output type does plcontainer support?
Like:

CREATE TYPE AS inner_type (
id1 integer,
name1 integer
);
CREATE TYPE AS output_type (
id integer,
names text[],
foo text[][],
bar inner_type,
foo2 double[][][][]
);
CREATE FUNCTION dummy100(i integer[][]) RETURNS setof output_type AS $$
# container: plc_r_shared
...
return (x)
$$ LANGUAGE plcontainer;

For types that plcontainer supports, there should be a formal gramma to define which type it could support.

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[HaozhouWang]

Yes, we need a matrix of type mapping