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authorNadrieril2019-03-01 17:28:19 +0100
committerNadrieril2019-03-01 17:28:19 +0100
commite5d9aee00b0c775df1d8e2d8819aeb80dffa73c2 (patch)
treee763a24a0d635048232e72e167ca37eafec69369 /dhall/src/errors/NoDependentTypes.txt
parent8a2b7536902831079eddd7b00291b718f5dd7186 (diff)
Split abnf_to_pest and dhall into their own crates
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+Explanation: The Dhall programming language does not allow functions from terms
+to types. These function types are also known as "dependent function types"
+because you have a type whose value "depends" on the value of a term.
+
+For example, this is $_NOT a legal function type:
+
+
+ ┌─────────────┐
+ │ Bool → Type │
+ └─────────────┘
+
+
+Similarly, this is $_NOT legal code:
+
+
+ ┌────────────────────────────────────────────────────┐
+ │ λ(Vector : Natural → Type → Type) → Vector +0 Text │
+ └────────────────────────────────────────────────────┘
+ ⇧
+ Invalid dependent type
+
+
+Your function type is invalid because the input has type:
+
+↳ $txt0
+
+... and the output has kind:
+
+↳ $txt1
+
+... which makes this a forbidden dependent function type