Skip to content

remove false statement about convert on types #22300

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 1 commit into from
Closed

remove false statement about convert on types #22300

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
5 changes: 0 additions & 5 deletions doc/src/manual/constructors.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -512,11 +512,6 @@ to their types. The type of a type is `Type`, so all constructor methods are sto
table for the `Type` type. This means that you can declare more flexible constructors, e.g. constructors
for abstract types, by explicitly defining methods for the appropriate types.

However, in some cases you could consider adding methods to `Base.convert` *instead* of defining
a constructor, because Julia falls back to calling [`convert()`](@ref) if no matching constructor
is found. For example, if no constructor `T(args...) = ...` exists `Base.convert(::Type{T}, args...) = ...`
is called.

`convert` is used extensively throughout Julia whenever one type needs to be converted to another
(e.g. in assignment, [`ccall`](@ref), etcetera), and should generally only be defined (or successful)
if the conversion is lossless. For example, `convert(Int, 3.0)` produces `3`, but `convert(Int, 3.2)`
Expand Down