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gleam_stdlib
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retired
A standard library for the Gleam programming language
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src/gleam@bool.erl
-module(gleam@bool).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).
-export(['and'/2, 'or'/2, negate/1, nor/2, nand/2, exclusive_or/2, exclusive_nor/2, compare/2, max/2, min/2, to_int/1, to_string/1, guard/3, lazy_guard/3]).
-spec 'and'(boolean(), boolean()) -> boolean().
'and'(A, B) ->
A andalso B.
-spec 'or'(boolean(), boolean()) -> boolean().
'or'(A, B) ->
A orelse B.
-spec negate(boolean()) -> boolean().
negate(Bool) ->
case Bool of
true ->
false;
false ->
true
end.
-spec nor(boolean(), boolean()) -> boolean().
nor(A, B) ->
case {A, B} of
{false, false} ->
true;
{false, true} ->
false;
{true, false} ->
false;
{true, true} ->
false
end.
-spec nand(boolean(), boolean()) -> boolean().
nand(A, B) ->
case {A, B} of
{false, false} ->
true;
{false, true} ->
true;
{true, false} ->
true;
{true, true} ->
false
end.
-spec exclusive_or(boolean(), boolean()) -> boolean().
exclusive_or(A, B) ->
case {A, B} of
{false, false} ->
false;
{false, true} ->
true;
{true, false} ->
true;
{true, true} ->
false
end.
-spec exclusive_nor(boolean(), boolean()) -> boolean().
exclusive_nor(A, B) ->
case {A, B} of
{false, false} ->
true;
{false, true} ->
false;
{true, false} ->
false;
{true, true} ->
true
end.
-spec compare(boolean(), boolean()) -> gleam@order:order().
compare(A, B) ->
case {A, B} of
{true, true} ->
eq;
{true, false} ->
gt;
{false, false} ->
eq;
{false, true} ->
lt
end.
-spec max(boolean(), boolean()) -> boolean().
max(A, B) ->
case A of
true ->
true;
false ->
B
end.
-spec min(boolean(), boolean()) -> boolean().
min(A, B) ->
case A of
false ->
false;
true ->
B
end.
-spec to_int(boolean()) -> integer().
to_int(Bool) ->
case Bool of
false ->
0;
true ->
1
end.
-spec to_string(boolean()) -> binary().
to_string(Bool) ->
case Bool of
false ->
<<"False"/utf8>>;
true ->
<<"True"/utf8>>
end.
-spec guard(boolean(), DEP, fun(() -> DEP)) -> DEP.
guard(Requirement, Consequence, Alternative) ->
case Requirement of
true ->
Consequence;
false ->
Alternative()
end.
-spec lazy_guard(boolean(), fun(() -> DEQ), fun(() -> DEQ)) -> DEQ.
lazy_guard(Requirement, Consequence, Alternative) ->
case Requirement of
true ->
Consequence();
false ->
Alternative()
end.