Deparser removes parentheses when deparsing a :: to CAST leading to incorrect math

[mbornstein]

Take this example:

SELECT (- (-10 - -12))::numeric AS delta
-- should be - ( 2 ) = -2

using deparseSync(parseSync(example)) (package pgsql-parser version 17.9.12 latest as of writing this, which bundles 17.18.0 of the deparser package) is turned into

SELECT CAST(- -10 - -12 AS numeric) AS delta
-- is 10 + 12 = 22

which is incorrect because the - will flip the sign for the left hand parameter before sending it to the second operation.

Note: this has nothing to do with consecutive - it's just to make it clear, my original query was SELECT (- (a."actual_eur" - a."budget_eur"))::numeric AS "delta_eur" from ...

Node 2: This is different to this issue #212