From 60129b7d1c0ea8bdf2ec666fa51957e97465e88f Mon Sep 17 00:00:00 2001 From: Nadrieril Date: Mon, 6 May 2019 23:17:26 +0200 Subject: Consolidate errors in the error module --- dhall/src/errors/MustMergeUnion.txt | 31 ------------------------------- 1 file changed, 31 deletions(-) delete mode 100644 dhall/src/errors/MustMergeUnion.txt (limited to 'dhall/src/errors/MustMergeUnion.txt') diff --git a/dhall/src/errors/MustMergeUnion.txt b/dhall/src/errors/MustMergeUnion.txt deleted file mode 100644 index 68df70c..0000000 --- a/dhall/src/errors/MustMergeUnion.txt +++ /dev/null @@ -1,31 +0,0 @@ -Explanation: You can ❰merge❱ the alternatives of a union using a record with one -handler per alternative, like this: - - - ┌─────────────────────────────────────────────────────────────────────┐ - │ let union = < Left = +2 | Right : Bool > │ - │ in let handlers = { Left = Natural/even, Right = λ(x : Bool) → x } │ - │ in merge handlers union : Bool │ - └─────────────────────────────────────────────────────────────────────┘ - - -... but the second argument to ❰merge❱ must be a union and not some other type. - -For example, the following expression is $_NOT valid: - - - ┌──────────────────────────────────────────┐ - │ let handlers = { Foo = λ(x : Bool) → x } │ - │ in merge handlers True : True │ - └──────────────────────────────────────────┘ - ⇧ - Invalid: ❰True❱ isn't a union - - -You tried to ❰merge❱ this expression: - -↳ $txt0 - -... which is not a union, but is actually a value of type: - -↳ $txt1 -- cgit v1.2.3