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agda-spa/lean/Spa/Language/Semantics.lean

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import Spa.Language.Base
import Spa.Lattice
namespace Spa
inductive Value where
| int (z : )
deriving DecidableEq
def Env : Type := List (String × Value)
inductive Env.Mem : String × Value Env Prop
| here (s : String) (v : Value) (ρ : Env) : Env.Mem (s, v) ((s, v) :: ρ)
| there (s s' : String) (v v' : Value) (ρ : Env) :
¬(s = s') Env.Mem (s, v) ρ Env.Mem (s, v) ((s', v') :: ρ)
inductive EvalExpr : Env Expr Value Prop
| num (ρ : Env) (n : ) : EvalExpr ρ (.num n) (.int n)
| var (ρ : Env) (x : String) (v : Value) :
Env.Mem (x, v) ρ EvalExpr ρ (.var x) v
| add (ρ : Env) (e₁ e₂ : Expr) (z₁ z₂ : ) :
EvalExpr ρ e₁ (.int z₁) EvalExpr ρ e₂ (.int z₂)
EvalExpr ρ (.add e₁ e₂) (.int (z₁ + z₂))
| sub (ρ : Env) (e₁ e₂ : Expr) (z₁ z₂ : ) :
EvalExpr ρ e₁ (.int z₁) EvalExpr ρ e₂ (.int z₂)
EvalExpr ρ (.sub e₁ e₂) (.int (z₁ - z₂))
inductive EvalBasicStmt : Env BasicStmt Env Prop
| noop (ρ : Env) : EvalBasicStmt ρ .noop ρ
| assign (ρ : Env) (x : String) (e : Expr) (v : Value) :
EvalExpr ρ e v EvalBasicStmt ρ (.assign x e) ((x, v) :: ρ)
inductive EvalBasicStmts : Env List BasicStmt Env Prop
| nil {ρ : Env} : EvalBasicStmts ρ [] ρ
| cons {ρ₁ ρ₂ ρ₃ : Env} {bs : BasicStmt} {bss : List BasicStmt} :
EvalBasicStmt ρ₁ bs ρ₂ EvalBasicStmts ρ₂ bss ρ₃
EvalBasicStmts ρ₁ (bs :: bss) ρ₃
inductive EvalStmt : Env Stmt Env Prop
| basic (ρ₁ ρ₂ : Env) (bs : BasicStmt) :
EvalBasicStmt ρ₁ bs ρ₂ EvalStmt ρ₁ (.basic bs) ρ₂
| andThen (ρ₁ ρ₂ ρ₃ : Env) (s₁ s₂ : Stmt) :
EvalStmt ρ₁ s₁ ρ₂ EvalStmt ρ₂ s₂ ρ₃
EvalStmt ρ₁ (.andThen s₁ s₂) ρ₃
| ifTrue (ρ₁ ρ₂ : Env) (e : Expr) (z : ) (s₁ s₂ : Stmt) :
EvalExpr ρ₁ e (.int z) ¬(z = 0) EvalStmt ρ₁ s₁ ρ₂
EvalStmt ρ₁ (.ifElse e s₁ s₂) ρ₂
| ifFalse (ρ₁ ρ₂ : Env) (e : Expr) (s₁ s₂ : Stmt) :
EvalExpr ρ₁ e (.int 0) EvalStmt ρ₁ s₂ ρ₂
EvalStmt ρ₁ (.ifElse e s₁ s₂) ρ₂
| whileTrue (ρ₁ ρ₂ ρ₃ : Env) (e : Expr) (z : ) (s : Stmt) :
EvalExpr ρ₁ e (.int z) ¬(z = 0) EvalStmt ρ₁ s ρ₂
EvalStmt ρ₂ (.whileLoop e s) ρ₃
EvalStmt ρ₁ (.whileLoop e s) ρ₃
| whileFalse (ρ : Env) (e : Expr) (s : Stmt) :
EvalExpr ρ e (.int 0)
EvalStmt ρ (.whileLoop e s) ρ
class LatticeInterpretation (L : Type*) [Lattice L] where
interp : L Value Prop
interp_sup : {l₁ l₂ : L} (v : Value),
interp l₁ v interp l₂ v interp (l₁ l₂) v
interp_inf : {l₁ l₂ : L} (v : Value),
interp l₁ v interp l₂ v interp (l₁ l₂) v
end Spa