Function patch_seq_cond 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn patch_seq_cond(stack: Stack) -> Stack

Multi-way conditional combinator

Takes N predicate/body quotation pairs from the stack, plus a value to test. Tries each predicate in order (last to first on stack). When a predicate returns non-zero, executes its corresponding body and returns.

Stack effect: ( value [pred1] [body1] [pred2] [body2] … [predN] [bodyN] count – result )

Each predicate quotation has effect: ( value – value bool ) Each body quotation has effect: ( value – result )

Example:

: route ( request -- response )
  [ dup "GET /" = ]           [ drop "Hello" ]
  [ dup "/api" starts-with ]  [ get-users ]
  [ drop 1 ]                  [ drop "Not Found" ]
  3 cond ;

Safety

• Stack must have at least (2*count + 2) values
• All predicate/body values must be Quotations
• Predicates must return Int (0 or non-zero)