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manual: make currency example compile and ensure it remains working

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Araq 2019-04-09 22:16:52 +02:00
commit 4974f999c3
1 changed files with 5 additions and 3 deletions
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doc/manual.rst
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@ -1858,7 +1858,9 @@ But it seems all this boilerplate code needs to be repeated for the ``Euro``
currency. This can be solved with templates_.
.. code-block:: nim
template additive(typ: type) =
:test: "nim c $1"
template additive(typ: typedesc) =
proc `+` *(x, y: typ): typ {.borrow.}
proc `-` *(x, y: typ): typ {.borrow.}
@ -1866,13 +1868,13 @@ currency. This can be solved with templates_.
proc `+` *(x: typ): typ {.borrow.}
proc `-` *(x: typ): typ {.borrow.}
template multiplicative(typ, base: type) =
template multiplicative(typ, base: typedesc) =
proc `*` *(x: typ, y: base): typ {.borrow.}
proc `*` *(x: base, y: typ): typ {.borrow.}
proc `div` *(x: typ, y: base): typ {.borrow.}
proc `mod` *(x: typ, y: base): typ {.borrow.}
template comparable(typ: type) =
template comparable(typ: typedesc) =
proc `<` * (x, y: typ): bool {.borrow.}
proc `<=` * (x, y: typ): bool {.borrow.}
proc `==` * (x, y: typ): bool {.borrow.}