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provide better error messages for large set (#20207)

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Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
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ringabout 2022-08-25 06:49:52 +08:00 • committed by GitHub
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2 changed files with 8 additions and 4 deletions
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2
compiler/semtypes.nim
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@ -17,7 +17,7 @@ const
errWrongNumberOfVariables = "wrong number of variables" errWrongNumberOfVariables = "wrong number of variables"
errInvalidOrderInEnumX = "invalid order in enum '$1'" errInvalidOrderInEnumX = "invalid order in enum '$1'"
errOrdinalTypeExpected = "ordinal type expected" errOrdinalTypeExpected = "ordinal type expected"
errSetTooBig = "set is too large" errSetTooBig = "set is too large; use `std/sets` for ordinal types with more than 2^16 elements"
errBaseTypeMustBeOrdinal = "base type of a set must be an ordinal" errBaseTypeMustBeOrdinal = "base type of a set must be an ordinal"
errInheritanceOnlyWithNonFinalObjects = "inheritance only works with non-final objects" errInheritanceOnlyWithNonFinalObjects = "inheritance only works with non-final objects"
errXExpectsOneTypeParam = "'$1' expects one type parameter" errXExpectsOneTypeParam = "'$1' expects one type parameter"

6
doc/sets_fragment.txt
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@ -14,9 +14,13 @@ The reason is that sets are implemented as high performance bit vectors.
Attempting to declare a set with a larger type will result in an error: Attempting to declare a set with a larger type will result in an error:
```nim ```nim
var s: set[int64] # Error: set is too large
var s: set[int64] # Error: set is too large; use `std/sets` for ordinal types
# with more than 2^16 elements
``` ```
**Note:** Nim also offers `hash sets <sets.html>`_ (which you need to import **Note:** Nim also offers `hash sets <sets.html>`_ (which you need to import
with `import sets`), which have no such restrictions. with `import sets`), which have no such restrictions.