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author | Hans Bolinder <hasse@erlang.org> | 2017-09-01 11:44:36 +0200 |
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committer | Hans Bolinder <hasse@erlang.org> | 2017-09-12 13:32:29 +0200 |
commit | 3d05725ceb26611ac8c19cc01df715089dc322d5 (patch) | |
tree | eeae656118cbb70744af4388cf9575b1c0cad481 /lib/hipe/misc | |
parent | c3f50bc462cc850bdef6b77d1a7a58091a75c936 (diff) | |
download | otp-3d05725ceb26611ac8c19cc01df715089dc322d5.tar.gz otp-3d05725ceb26611ac8c19cc01df715089dc322d5.tar.bz2 otp-3d05725ceb26611ac8c19cc01df715089dc322d5.zip |
dialyzer: Modify handling of singleton map key types
The test case loop.erl shows that there is a problem with certain
singleton key types. Here the internal representation toggles between
#{a | b => ...} and #{a => ..., b => ...}
The choice is to turn #{a | b => ...} into #{a => ..., b => ...} early
(t_from_form()). The aim is to keep as much info as possible (in
pairs). However, including complex singleton keys (tuples, maps) in
this scheme is potentially too costly, and a bit complicated. So one
more choice is made: let atoms and number (and nothing else) be
singleton types, and let complex keys go into the default key.
Diffstat (limited to 'lib/hipe/misc')
0 files changed, 0 insertions, 0 deletions