in reply to Perl and data types (use Config;)
use Config; $, = "\n"; print sort grep {/size$/} keys %Config;
On my system I get
charsize d_chsize doublesize fpossize gidsize i16size i32size i64size i8size intsize ivsize longdblsize longlongsize longsize lseeksize nvsize ptrsize shortsize sig_size sizesize u16size u32size u64size u8size uidsize uvsize
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