C# 10 reference update: with expression and structure types#26100
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BillWagner merged 2 commits intodotnet:mainfrom Sep 15, 2021
pkulikov:struct-with
Merged
C# 10 reference update: with expression and structure types#26100BillWagner merged 2 commits intodotnet:mainfrom pkulikov:struct-with
BillWagner merged 2 commits intodotnet:mainfrom
pkulikov:struct-with
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pkulikov
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Sep 14, 2021
| Any record type has the *copy constructor*. That is a constructor with a single parameter of the containing record type. It copies the state of its argument to a new record instance. At evaluation of a `with` expression, the copy constructor gets called to instantiate a new record instance based on an original record. After that, the new instance gets updated according to the specified modifications. By default, the copy constructor is implicit, that is, compiler-generated. If you need to customize the record copy semantics, explicitly declare a copy constructor with the desired behavior. The following example updates the preceding example with an explicit copy constructor. The new copy behavior is to copy list items instead of a list reference when a record is copied: | ||
| ## Custom copy semantics | ||
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| Any record class type has the *copy constructor*. That is a constructor with a single parameter of the containing record type. It copies the state of its argument to a new record instance. At evaluation of a `with` expression, the copy constructor gets called to instantiate a new record instance based on an original record. After that, the new instance gets updated according to the specified modifications. By default, the copy constructor is implicit, that is, compiler-generated. If you need to customize the record copy semantics, explicitly declare a copy constructor with the desired behavior. The following example updates the preceding example with an explicit copy constructor. The new copy behavior is to copy list items instead of a list reference when a record is copied: |
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Sorry: the added header doesn't show the convenient diff. The only change in this paragraph is at the very first sentence. Please take a note.
BillWagner
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This is great @pkulikov
I'll 
now.
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