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update the doc

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cooldome 2018-04-29 23:17:07 +01:00
commit b3a80dd2eb
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2
changelog.md
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@ -81,6 +81,8 @@
Imported exceptions can be raised and caught just like Nim exceptions. Imported exceptions can be raised and caught just like Nim exceptions.
More details in language manual. More details in language manual.
- Range float typed, example `range[0.0 .. Inf]`. More details in language manual.
### Tool changes ### Tool changes
- ``jsondoc2`` has been renamed ``jsondoc``, similar to how ``doc2`` was renamed - ``jsondoc2`` has been renamed ``jsondoc``, similar to how ``doc2`` was renamed

2
compiler/types.nim
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@ -704,7 +704,7 @@ proc lastValue*[T:BiggestInt|BiggestFloat](t: PType; fixedUnsigned = false): T =
internalError("invalid kind for first(" & $t.kind & ')') internalError("invalid kind for first(" & $t.kind & ')')
result = NaN result = NaN
proc lastOrd*(t: PType; fixedUnsigned = false): BiggestInt {.inline.}= proc lastOrd*(t: PType; fixedUnsigned = false): BiggestInt {.inline.} =
lastValue[BiggestInt](t, fixedUnsigned) lastValue[BiggestInt](t, fixedUnsigned)
proc lengthOrd*(t: PType): BiggestInt = proc lengthOrd*(t: PType): BiggestInt =

10
doc/manual.rst
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@ -741,22 +741,26 @@ For further details, see `Convertible relation
Subrange types Subrange types
-------------- --------------
A subrange type is a range of values from an ordinal type (the base A subrange type is a range of values from an ordinal or float point type (the base
type). To define a subrange type, one must specify it's limiting values: the type). To define a subrange type, one must specify it's limiting values: the
lowest and highest value of the type: lowest and highest value of the type:
.. code-block:: nim .. code-block:: nim
type type
Subrange = range[0..5] Subrange = range[0..5]
PositiveFloat = range[0.0..Inf]
``Subrange`` is a subrange of an integer which can only hold the values 0 ``Subrange`` is a subrange of an integer which can only hold the values 0
to 5. Assigning any other value to a variable of type ``Subrange`` is a to 5. ``PositiveFloat`` defines a subrange of all positive floating point values.
NaN does not belong to any subrange of floating point types.
Assigning any other value to a variable of type ``Subrange`` is a
checked runtime error (or static error if it can be statically checked runtime error (or static error if it can be statically
determined). Assignments from the base type to one of its subrange types determined). Assignments from the base type to one of its subrange types
(and vice versa) are allowed. (and vice versa) are allowed.
A subrange type has the same size as its base type (``int`` in the example). A subrange type has the same size as its base type (``int`` in the
Subrange example).
Pre-defined floating point types Pre-defined floating point types