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[erlang/en] Fix #970

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Julien Cretel
2015-05-20 08:45:15 +01:00
parent b33799a8d5
commit fbfd64b367
1 changed files with 6 additions and 2 deletions
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erlang.html.markdown
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@@ -167,8 +167,12 @@ is_dog(A) -> false.
% A guard sequence is either a single guard or a series of guards, separated % A guard sequence is either a single guard or a series of guards, separated
% by semicolons (`;`). The guard sequence `G1; G2; ...; Gn` is true if at % by semicolons (`;`). The guard sequence `G1; G2; ...; Gn` is true if at
% least one of the guards `G1`, `G2`, ..., `Gn` evaluates to `true`. % least one of the guards `G1`, `G2`, ..., `Gn` evaluates to `true`.
is_pet(A) when is_dog(A); is_cat(A) -> true; is_pet(A) when is_atom(A), (A =:= dog) or (A =:= cat) -> true;
is_pet(A) -> false. is_pet(A) -> false.
% Warning: not all valid Erlang expressions can be used as guard expressions;
% in particular, our `is_cat` and `is_dog` functions cannot be used within the
% guard sequence in `is_pet`'s definition.
% Records provide a method for associating a name with a particular element in a % Records provide a method for associating a name with a particular element in a
% tuple. % tuple.