# signatures.rel — El-level return types for runtime builtins.
#
# el_runtime.h declares every builtin as returning el_val_t, because El has ONE
# type. That single type is why the whole seam is cheap, and it is also why the
# header cannot say that now() returns an Instant while unix_seconds() returns
# an Int. The El-level type is real and the C boundary erases it.
#
# So the compiler needs this, and unlike the other checks it needs it at
# EMISSION time: Instant + Duration must become el_instant_add_dur, and that is
# dispatch, not adjudication. What moved here is the DATA -- previously 19
# hardcoded names across two functions in codegen.el. What stays in the emitter
# is choosing which call to emit, which is an emitter's actual job.
#
#   <builtin> returns <El type>

now                     returns Instant
el_now_instant          returns Instant
unix_seconds            returns Instant
unix_millis             returns Instant
instant_from_iso8601    returns Instant
el_instant_add_dur      returns Instant
el_instant_sub_dur      returns Instant

el_duration_from_nanos  returns Duration
duration_seconds        returns Duration
duration_millis         returns Duration
duration_nanos          returns Duration
el_instant_diff         returns Duration
el_duration_add         returns Duration
el_duration_sub         returns Duration
el_duration_scale       returns Duration
el_duration_div         returns Duration
ttl_cache_age           returns Duration