diff options
author | Björn Gustavsson <[email protected]> | 2016-01-30 07:21:52 +0100 |
---|---|---|
committer | Björn Gustavsson <[email protected]> | 2016-02-03 10:23:02 +0100 |
commit | 4f567ddbe4eccfb4803a94675207efc65199615b (patch) | |
tree | 698882e343fc3cd536e18b8eeb071d581566095f /lib/ssl/src/ssl_tls_dist_proxy.erl | |
parent | 2f8d51915c3dff7e95c62820b6f7c0ce2ff5ef5a (diff) | |
download | otp-4f567ddbe4eccfb4803a94675207efc65199615b.tar.gz otp-4f567ddbe4eccfb4803a94675207efc65199615b.tar.bz2 otp-4f567ddbe4eccfb4803a94675207efc65199615b.zip |
v3_core: Eliminate double processing of patterns
Internally in the v3_core pass, an #imatch{} record represents
a match expression:
Pattern = Expression
If Pattern is a single, unbound variable, #imatch{} will be
rewritten to #iset{}; otherwise it will be rewritten to #icase{}.
To determine how #imatch{} should be translated, the pattern is
processed using upattern/3. The return value from upattern/3 is thrown
away (after having been used for determing how the #imatch{} record
should be translated).
That means that every pattern in an #imatch{} is processed twice,
which is wasteful.
We can easily avoid the double processing of patterns by
introducing a new helper function that determines whether the
pattern is a new variable.
Diffstat (limited to 'lib/ssl/src/ssl_tls_dist_proxy.erl')
0 files changed, 0 insertions, 0 deletions