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Questions - idris

Why does Idris 2 fail to resolve constraints with function composition in this trivial example?

I have encountered a problem with some code I am trying to write in Idris 2. I would like to resolve this issue, but more importantly, I wish to understand it more deeply and develop some skills in di...
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label17

typechecking

idris

function-composition

Votes: 0

Answers: 1

Latest Answer

Let look at the types involved Prelude.. : (b -> c ) -> (a -> b ) -> a -> c f : D n -> String d : (n : Nat) -> D n The problem...
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michaelmesser

Applying known proofs in Idris 1 interactive elaborator

I am trying to get some familiarity with theorem proving in Idris1 by exercise and am running into trouble. Suppose I have the following definition for naturals and the following theorems that I want ...
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Andrii Kozytskyi

idris

theorem-proving

Votes: 0

Answers: 1

Latest Answer

I couldn't get the Idris 1 version to work but I did install Idris 2 and wrote the proofs in its style instead. module Peano data Natural = Zero | Succ Natural plus : Natural -> Natural -> Nat...
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Andrii Kozytskyi

What does it mean to erase an argument in an erased function?

When I define type synonyms I typically erase them as 0 Foo : Type. If there are parameters to that synonym, I can also erase those, like 0 Foo : (0 _ : Nat) -> (0 _ : Type) -> Type but what do...
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joel

idris

Votes: 0

Answers: 0

Non-unique determining parameter

The meaning of a determining parameter in an interface, as I understand it, is that the compiler can use that parameter to uniquely determine which implementation to use. However, I can create multipl...
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joel

interface

idris

Votes: 0

Answers: 0

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