def Lean.Meta.Grind.getBuiltinInstance? (type : Expr) : Option Expr

Some modules in grind use builtin instances defined directly in core (e.g., lia). Users may provide nonstandard instances that are definitionally equal to the ones in core. Given a type, such as HAdd Int Int Int, this function returns the instance defined in core.

Equations

• Lean.Meta.Grind.getBuiltinInstance? type = Lean.Meta.Grind.builtinInsts✝[type]?

def Lean.Meta.Grind.synthInstanceMeta? (type : Expr) : MetaM (Option Expr)

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@[reducible, inline]

abbrev Lean.Meta.Grind.synthInstance? (type : Expr) : GoalM (Option Expr)

Equations

• Lean.Meta.Grind.synthInstance? type = liftM (Lean.Meta.Grind.synthInstanceMeta? type)

def Lean.Meta.Grind.synthInstance (type : Expr) : GoalM Expr

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def Lean.Meta.Grind.synthInstanceAndAssign (x type : Expr) : GoalM Bool

Helper function for instantiating a type class type, and then using the result to perform isDefEq x val.

Equations

• Lean.Meta.Grind.synthInstanceAndAssign x type = do let __discr ← Lean.Meta.Grind.synthInstance? type match __discr with | some val => liftM (Lean.Meta.isDefEq x val) | x => pure false