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| author | Björn-Egil Dahlberg <[email protected]> | 2014-04-01 11:49:56 +0200 |
|---|---|---|
| committer | Björn-Egil Dahlberg <[email protected]> | 2014-04-01 11:49:56 +0200 |
| commit | ac1f6ffb557c5e702722e8b74f616c55cee2cee3 (patch) | |
| tree | 1ece5d726543c0cd49d005fdb16d36b11481c5e4 /erts | |
| parent | 3ccf4a77ee8ff4ca86ec2c46c2645607c094e800 (diff) | |
| parent | fbb05239aeccc400aa4e4a359a3fb81ef555e441 (diff) | |
| download | otp-ac1f6ffb557c5e702722e8b74f616c55cee2cee3.tar.gz otp-ac1f6ffb557c5e702722e8b74f616c55cee2cee3.tar.bz2 otp-ac1f6ffb557c5e702722e8b74f616c55cee2cee3.zip | |
Merge branch 'egil/maps-doc'
* egil/maps-doc:
doc: Add Maps example for sequential programming
doc: Mention map expressions and map guards
doc: Add maps to reference manual
edoc: Add map/0 as a new predefined type
doc: Descripe Maps type syntax
doc: Clearify language of user-defined attributes
doc: Document Maps datatype in reference manual
erts: Document map guard functions
erts: Fix is_map/1 spec
Diffstat (limited to 'erts')
| -rw-r--r-- | erts/doc/src/erlang.xml | 20 | ||||
| -rw-r--r-- | erts/preloaded/src/erlang.erl | 6 |
2 files changed, 23 insertions, 3 deletions
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml index 7aaded200c..e7e9b218f2 100644 --- a/erts/doc/src/erlang.xml +++ b/erts/doc/src/erlang.xml @@ -1784,6 +1784,15 @@ os_prompt% </pre> </desc> </func> <func> + <name name="is_map" arity="1"/> + <fsummary>Check whether a term is a map</fsummary> + <desc> + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is a map; + otherwise returns <c>false</c>.</p> + <p>Allowed in guard tests.</p> + </desc> + </func> + <func> <name name="is_number" arity="1"/> <fsummary>Check whether a term is a number</fsummary> <desc> @@ -2220,6 +2229,17 @@ os_prompt% </pre> </desc> </func> <func> + <name name="map_size" arity="1"/> + <fsummary>Return the size of a map</fsummary> + <desc> + <p>Returns an integer which is the number of key-value pairs in <c><anno>Map</anno></c>.</p> + <pre> +> <input>map_size(#{a=>1, b=>2, c=>3}).</input> +3</pre> + <p>Allowed in guard tests.</p> + </desc> + </func> + <func> <name name="max" arity="2"/> <fsummary>Return the largest of two term</fsummary> <desc> diff --git a/erts/preloaded/src/erlang.erl b/erts/preloaded/src/erlang.erl index fbc37bd955..cabbbd191f 100644 --- a/erts/preloaded/src/erlang.erl +++ b/erts/preloaded/src/erlang.erl @@ -1745,9 +1745,9 @@ is_pid(_Term) -> erlang:nif_error(undefined). %% Shadowed by erl_bif_types: erlang:is_map/1 --spec is_map(Map) -> boolean() when - Map :: map(). -is_map(_Map) -> +-spec is_map(Term) -> boolean() when + Term :: term(). +is_map(_Term) -> erlang:nif_error(undefined). %% Shadowed by erl_bif_types: erlang:is_port/1 |