Sum package:ghc-lib-parser

Last two are the locations of the '|' before and after the payload

The sum function computes the sum of the numbers of a structure.

Examples

Basic usage:

>>> sum []
0

>>> sum [42]
42

>>> sum [1..10]
55

>>> sum [4.1, 2.0, 1.7]
7.8

>>> sum [1..]
* Hangs forever *

An unboxed sum type.

Anonymous sum pattern

• AnnKeywordId : AnnOpen '(#', AnnClose '#)'

The width of an unboxed sum

In UnboxedSumE and UnboxedSumP, the number associated with a particular data constructor. SumAlts are one-indexed and should never exceed the value of its corresponding SumArity. For example:

• (#_|#) has SumAlt 1 (out of a total SumArity of 2)
• (#|_#) has SumAlt 2 (out of a total SumArity of 2)

In UnboxedSumE, UnboxedSumT, and UnboxedSumP, the total number of SumAlts. For example, (#|#) has a SumArity of 2.

Data constructor for i-th alternative of a n-ary unboxed sum.

Type constructor for n-ary unboxed sum.