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authorSverker Eriksson <[email protected]>2014-03-12 20:11:10 +0100
committerSverker Eriksson <[email protected]>2014-03-14 15:08:23 +0100
commitc543d5bff7fb23c3f44cc4817c0654117de78919 (patch)
tree2ef05bcb7ea4a167b69a2938009fe25a137cc6aa /erts/doc
parent8fbe76d64e7d55eb41943484602b928658313a65 (diff)
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erts: Change external format for maps
to be: 116,Arity, K1,V1,K2,V2,...,Kn,Vn instead of: 116,Arity, K1,K2,...,Kn, V1,V2,....,Vn We think this will be better for future internal map structures like HAMT. Would be bad if we need to iterate twice over HAMT in term_to_binary, one for keys and one for values.
Diffstat (limited to 'erts/doc')
-rw-r--r--erts/doc/src/erl_ext_dist.xml13
1 files changed, 5 insertions, 8 deletions
diff --git a/erts/doc/src/erl_ext_dist.xml b/erts/doc/src/erl_ext_dist.xml
index 9a53f3f829..fa083db4c7 100644
--- a/erts/doc/src/erl_ext_dist.xml
+++ b/erts/doc/src/erl_ext_dist.xml
@@ -581,23 +581,20 @@
<cell align="center">1</cell>
<cell align="center">4</cell>
<cell align="center">N</cell>
- <cell align="center">M</cell>
</row>
<row>
<cell align="center">116</cell>
<cell align="center">Arity</cell>
- <cell align="center">Keys</cell>
- <cell align="center">Values</cell>
+ <cell align="center">Pairs</cell>
</row>
<tcaption></tcaption></table>
<p>
<c>MAP_EXT</c> encodes a map. The <c>Arity</c> field is an unsigned
4 byte integer in big endian format that determines the number of
- key-value pairs in the map. All key terms follow in the <c>Keys</c>
- section and then all value terms in the <c>Values</c> section. Keys
- and values are paired according to order; first key with first value
- and so on. Duplicate keys are <em>not allowed</em> within the same
- map.
+ key-value pairs in the map. Key and value pairs (<c>Ki => Vi</c>)
+ are encoded in the <c>Pairs</c> section in the following order:
+ <c>K1, V1, K2, V2,..., Kn, Vn</c>.
+ Duplicate keys are <em>not allowed</em> within the same map.
</p>
<p><em>Since: </em>OTP 17.0</p>
</section>