6592cd058d
git-subtree-dir: octive-lean git-subtree-mainline:fd3d42ae33git-subtree-split:4b6fcec565
33 lines
1.2 KiB
Text
33 lines
1.2 KiB
Text
namespace OctiveLean.Core
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/-! # Tiny Octave Core (TOC) — abstract syntax.
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Parallel to golang-lean's TGC. Shared kernel: ten constructors covering
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λ-calculus core + conditionals + sequencing. Octave-specific extensions:
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`assign` (variable mutation in the env) and `whileT` (loop until false).
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What is *not* here: matrices, cell arrays, ranges, anonymous-function
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captures with `@(x) expr` syntax, `printf`-family builtins. Those are
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desugaring targets for the surface-Octave→TOC translator (later). -/
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inductive BinOp where
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| add | sub | mul
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| eq | lt
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deriving Repr, BEq, DecidableEq, Inhabited
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inductive Term where
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| unitT : Term
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| intLit : Int → Term
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| boolLit : Bool → Term
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| var : String → Term
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| lam : String → Term → Term -- λ x. e
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| app : Term → Term → Term
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| letIn : String → Term → Term → Term -- let x = e₁ in e₂ (lexical)
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| ifte : Term → Term → Term → Term
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| binop : BinOp → Term → Term → Term
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| seq : Term → Term → Term
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| assign : String → Term → Term -- x = e (mutates env)
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| whileT : Term → Term → Term -- while c do b
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deriving Repr, Inhabited
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end OctiveLean.Core
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