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authorNadrieril2019-03-01 17:28:19 +0100
committerNadrieril2019-03-01 17:28:19 +0100
commite5d9aee00b0c775df1d8e2d8819aeb80dffa73c2 (patch)
treee763a24a0d635048232e72e167ca37eafec69369 /src/errors/FieldCollision.txt
parent8a2b7536902831079eddd7b00291b718f5dd7186 (diff)
Split abnf_to_pest and dhall into their own crates
Diffstat (limited to 'src/errors/FieldCollision.txt')
-rw-r--r--src/errors/FieldCollision.txt43
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diff --git a/src/errors/FieldCollision.txt b/src/errors/FieldCollision.txt
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-Explanation: You can combine records if they don't share any fields in common,
-like this:
-
-
- ┌───────────────────────────────────────────┐
- │ { foo = 1, bar = "ABC" } ∧ { baz = True } │
- └───────────────────────────────────────────┘
-
-
- ┌────────────────────────────────────────┐
- │ λ(r : { baz : Bool}) → { foo = 1 } ∧ r │
- └────────────────────────────────────────┘
-
-
-... but you cannot merge two records that share the same field
-
-For example, the following expression is $_NOT valid:
-
-
- ┌───────────────────────────────────────────┐
- │ { foo = 1, bar = "ABC" } ∧ { foo = True } │ Invalid: Colliding ❰foo❱ fields
- └───────────────────────────────────────────┘
-
-
-You combined two records that share the following field:
-
-↳ $txt0
-
-... which is not allowed
-
-Some common reasons why you might get this error:
-
-● You tried to use ❰∧❱ to update a field's value, like this:
-
-
- ┌────────────────────────────────────────┐
- │ { foo = 1, bar = "ABC" } ∧ { foo = 2 } │
- └────────────────────────────────────────┘
- ⇧
- Invalid attempt to update ❰foo❱'s value to ❰2❱
-
- Field updates are intentionally not allowed as the Dhall language discourages
- patch-oriented programming