42 lines
2.3 KiB
Agda
42 lines
2.3 KiB
Agda
{-# OPTIONS --rewriting #-}
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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 (BinaryOperator; Block; Expr; nil; var; val; addr; block_is_end; _$_; local_←_; return; done; _∙_; number; string; binexp; +; -; *; /; <; >; <=; >=; ··)
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open import Luau.RuntimeType using (RuntimeType; valueType; function; number; string)
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open import Properties.Equality using (_≢_)
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data BinOpError : BinaryOperator → RuntimeType → Set where
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+ : ∀ {t} → (t ≢ number) → BinOpError + t
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- : ∀ {t} → (t ≢ number) → BinOpError - t
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* : ∀ {t} → (t ≢ number) → BinOpError * t
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/ : ∀ {t} → (t ≢ number) → BinOpError / t
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< : ∀ {t} → (t ≢ number) → BinOpError < t
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> : ∀ {t} → (t ≢ number) → BinOpError > t
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<= : ∀ {t} → (t ≢ number) → BinOpError <= t
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>= : ∀ {t} → (t ≢ number) → BinOpError >= t
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·· : ∀ {t} → (t ≢ string) → BinOpError ·· t
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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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FunctionMismatch : ∀ v w → (valueType v ≢ function) → RuntimeErrorᴱ H (val v $ val w)
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BinOpMismatch₁ : ∀ v w {op} → (BinOpError op (valueType v)) → RuntimeErrorᴱ H (binexp (val v) op (val w))
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BinOpMismatch₂ : ∀ v w {op} → (BinOpError op (valueType w)) → RuntimeErrorᴱ H (binexp (val v) op (val w))
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UnboundVariable : ∀ {x} → RuntimeErrorᴱ H (var x)
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SEGV : ∀ {a} → (H [ a ] ≡ nothing) → RuntimeErrorᴱ H (val (addr a))
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app₁ : ∀ {M N} → RuntimeErrorᴱ H M → RuntimeErrorᴱ H (M $ N)
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app₂ : ∀ {M N} → RuntimeErrorᴱ H N → 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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bin₁ : ∀ {M N op} → RuntimeErrorᴱ H M → RuntimeErrorᴱ H (binexp M op N)
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bin₂ : ∀ {M N op} → RuntimeErrorᴱ H N → RuntimeErrorᴱ H (binexp M op N)
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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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