Currently, ∘() gives a Meth

Closing as a duplicate of the discussion in <a class="issue-link js-issue-link" data-e

Also duplicate of <a class="issue-link js-issue-link" data-error-text="Failed to load

empty function composition ∘() should return Base.identity? about julia HOT 2 CLOSED

stevengj commented on May 12, 2024 2

empty function composition ∘() should return Base.identity?

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Comments (2)

stevengj commented on May 12, 2024

Closing as a duplicate of the discussion in #34251.

There is also an explicit comment about this in the source code:

julia/test/operators.jl

Lines 171 to 174 in c0c676b

 # Like +() and *() we leave ∘() undefined. 

 # While `∘() = identity` is a reasonable definition for functions, this 

 # would cause headaches for composition of user defined morphisms. 

 # See also #34251

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stevengj commented on May 12, 2024

Also duplicate of #52436.

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empty function composition ∘() should return Base.identity? about julia HOT 2 CLOSED

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	# Like +() and *() we leave ∘() undefined.
	# While `∘() = identity` is a reasonable definition for functions, this
	# would cause headaches for composition of user defined morphisms.
	# See also #34251