structure Lean.ProjectionFunctionInfo : Type

Given a structure S, Lean automatically creates an auxiliary definition (projection function) for each field. This structure caches information about these auxiliary definitions.

• ctorName : Lean.Name

  Constructor associated with the auxiliary projection function.

• numParams : Nat

  Number of parameters in the structure

• i : Nat

  The field index associated with the auxiliary projection function.

• fromClass : Bool

  true if the structure is a class.

instance Lean.instInhabitedProjectionFunctionInfo : Inhabited Lean.ProjectionFunctionInfo

Equations

• Lean.instInhabitedProjectionFunctionInfo = { default := { ctorName := default, numParams := default, i := default, fromClass := default } }

instance Lean.instReprProjectionFunctionInfo : Repr Lean.ProjectionFunctionInfo

Equations

• Lean.instReprProjectionFunctionInfo = { reprPrec := Lean.reprProjectionFunctionInfo✝ }

@[export lean_mk_projection_info]

def Lean.mkProjectionInfoEx (ctorName : Lean.Name) (numParams i : Nat) (fromClass : Bool) : Lean.ProjectionFunctionInfo

@[export lean_projection_info_from_class]

def Lean.ProjectionFunctionInfo.fromClassEx (info : Lean.ProjectionFunctionInfo) : Bool

Equations

• info.fromClassEx = info.fromClass

opaque Lean.projectionFnInfoExt : Lean.MapDeclarationExtension Lean.ProjectionFunctionInfo

@[export lean_add_projection_info]

def Lean.addProjectionFnInfo (env : Lean.Environment) (projName ctorName : Lean.Name) (numParams i : Nat) (fromClass : Bool) : Lean.Environment

@[export lean_get_projection_info]

def Lean.Environment.getProjectionFnInfo? (env : Lean.Environment) (projName : Lean.Name) : Option Lean.ProjectionFunctionInfo

Equations

• env.getProjectionFnInfo? projName = Lean.projectionFnInfoExt.find? env projName

def Lean.Environment.isProjectionFn (env : Lean.Environment) (declName : Lean.Name) : Bool

Equations

• env.isProjectionFn declName = Lean.projectionFnInfoExt.contains env declName

def Lean.Environment.getProjectionStructureName? (env : Lean.Environment) (projName : Lean.Name) : Option Lean.Name

If projName is the name of a projection function, return the associated structure name

Equations

• One or more equations did not get rendered due to their size.

def Lean.isProjectionFn {m : Type → Type} [Lean.MonadEnv m] [Monad m] (declName : Lean.Name) : m Bool

Equations

• Lean.isProjectionFn declName = do let __do_lift ← Lean.getEnv pure (__do_lift.isProjectionFn declName)

def Lean.getProjectionFnInfo? {m : Type → Type} [Lean.MonadEnv m] [Monad m] (declName : Lean.Name) : m (Option Lean.ProjectionFunctionInfo)