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22 lines
1.1 KiB
Agda
22 lines
1.1 KiB
Agda
module Luau.RuntimeError where
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open import Agda.Builtin.Equality using (_≡_)
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open import Luau.Heap using (Heap; _[_])
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open import FFI.Data.Maybe using (just; nothing)
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open import FFI.Data.String using (String)
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open import Luau.Syntax using (Block; Expr; nil; var; addr; block_is_end; _$_; local_←_; return; done; _∙_; number)
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data RuntimeErrorᴮ {a} (H : Heap a) : Block a → Set
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data RuntimeErrorᴱ {a} (H : Heap a) : Expr a → Set
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data RuntimeErrorᴱ H where
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NilIsNotAFunction : ∀ {M} → RuntimeErrorᴱ H (nil $ M)
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NumberIsNotAFunction : ∀ n {M} → RuntimeErrorᴱ H ((number n) $ M)
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UnboundVariable : ∀ x → RuntimeErrorᴱ H (var x)
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SEGV : ∀ a → (H [ a ] ≡ nothing) → RuntimeErrorᴱ H (addr a)
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app : ∀ {M N} → RuntimeErrorᴱ H M → RuntimeErrorᴱ H (M $ N)
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block : ∀ b {B} → RuntimeErrorᴮ H B → RuntimeErrorᴱ H (block b is B end)
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data RuntimeErrorᴮ H where
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local : ∀ x {M B} → RuntimeErrorᴱ H M → RuntimeErrorᴮ H (local x ← M ∙ B)
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return : ∀ {M B} → RuntimeErrorᴱ H M → RuntimeErrorᴮ H (return M ∙ B)
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