opaque Lean.EnvExtensionStateSpec : (α : Type) × Inhabited α

Opaque environment extension state.

def Lean.EnvExtensionState : Type

Equations

• Lean.EnvExtensionState = Lean.EnvExtensionStateSpec.fst

instance Lean.instInhabitedEnvExtensionState : Inhabited Lean.EnvExtensionState

Equations

• Lean.instInhabitedEnvExtensionState = Lean.EnvExtensionStateSpec.snd

def Lean.ModuleIdx : Type

Equations

• Lean.ModuleIdx = Nat

@[inline]

abbrev Lean.ModuleIdx.toNat (midx : Lean.ModuleIdx) : Nat

Equations

• Lean.ModuleIdx.toNat midx = midx

instance Lean.instInhabitedModuleIdx : Inhabited Lean.ModuleIdx

Equations

• Lean.instInhabitedModuleIdx = { default := 0 }

@[inline]

abbrev Lean.ConstMap : Type

Equations

• Lean.ConstMap = Lean.SMap Lean.Name Lean.ConstantInfo

structure Lean.Import : Type

• module : Lean.Name
• runtimeOnly : Bool

instance Lean.instReprImport : Repr Lean.Import

Equations

• Lean.instReprImport = { reprPrec := Lean.reprImport✝ }

instance Lean.instInhabitedImport : Inhabited Lean.Import

Equations

• Lean.instInhabitedImport = { default := { module := default, runtimeOnly := default } }

instance Lean.instToStringImport : ToString Lean.Import

Equations

• Lean.instToStringImport = { toString := fun imp => toString imp.module ++ if imp.runtimeOnly = true then " (runtime)" else "" }

def Lean.CompactedRegion : Type

A compacted region holds multiple Lean objects in a contiguous memory region, which can be read/written to/from disk. Objects inside the region do not have reference counters and cannot be freed individually. The contents of .olean files are compacted regions.

Equations

• Lean.CompactedRegion = USize

@[extern lean_compacted_region_is_memory_mapped]

opaque Lean.CompactedRegion.isMemoryMapped : Lean.CompactedRegion → Bool

@[extern lean_compacted_region_free]

unsafe opaque Lean.CompactedRegion.free : Lean.CompactedRegion → IO Unit

Free a compacted region and its contents. No live references to the contents may exist at the time of invocation.

opaque Lean.EnvExtensionEntrySpec : NonemptyType

Opaque persistent environment extension entry.

def Lean.EnvExtensionEntry : Type

Equations

• Lean.EnvExtensionEntry = NonemptyType.type Lean.EnvExtensionEntrySpec

instance Lean.instNonemptyEnvExtensionEntry : Nonempty Lean.EnvExtensionEntry

Equations

• Lean.instNonemptyEnvExtensionEntry = Lean.instNonemptyEnvExtensionEntry.proof_1

structure Lean.ModuleData : Type

• imports : Array Lean.Import

• constNames contains all constant names in constants. This information is redundant. It is equal to constants.map fun c => c.name, but it improves the performance of importModules. perf reports that 12% of the runtime was being spent on ConstantInfo.name when importing a file containing only import Lean

  constNames : Array Lean.Name
• constants : Array Lean.ConstantInfo

• Extra entries for the const2ModIdx map in the Environment object. The code generator creates auxiliary declarations that are not in the mapping constants, but we want to know in which module they were generated.

  extraConstNames : Array Lean.Name
• entries : Array (Lean.Name × Array Lean.EnvExtensionEntry)

Content of a .olean file. We use compact.cpp to generate the image of this object in disk.

instance Lean.instInhabitedModuleData : Inhabited Lean.ModuleData

Equations

• Lean.instInhabitedModuleData = { default := { imports := default, constNames := default, constants := default, extraConstNames := default, entries := default } }

structure Lean.EnvironmentHeader : Type

• The trust level used by the kernel. For example, the kernel assumes imported constants are type correct when the trust level is greater than zero.

  trustLevel : UInt32

• quotInit = true if the command init_quot has already been executed for the environment, and Quot declarations have been added to the environment.

  quotInit : Bool

• Name of the module being compiled.

  mainModule : Lean.Name

• Direct imports

  imports : Array Lean.Import

• Compacted regions for all imported modules. Objects in compacted memory regions do no require any memory management.

  regions : Array Lean.CompactedRegion

• Name of all imported modules (directly and indirectly).

  moduleNames : Array Lean.Name

• Module data for all imported modules.

  moduleData : Array Lean.ModuleData

Environment fields that are not used often.

instance Lean.instNonemptyEnvironmentHeader : Nonempty Lean.EnvironmentHeader

Equations

• Lean.instNonemptyEnvironmentHeader = Lean.instNonemptyEnvironmentHeader.proof_1

structure Lean.Environment : Type

• Mapping from constant name to module (index) where constant has been declared. Recall that a Lean file has a header where previously compiled modules can be imported. Each imported module has a unique ModuleIdx. Many extensions use the ModuleIdx to efficiently retrieve information stored in imported modules.

  Remark: this mapping also contains auxiliary constants, created by the code generator, that are not in the field constants. These auxiliary constants are invisible to the Lean kernel and elaborator. Only the code generator uses them.

  const2ModIdx : Lean.HashMap Lean.Name Lean.ModuleIdx

• Mapping from constant name to ConstantInfo. It contains all constants (definitions, theorems, axioms, etc) that have been already type checked by the kernel.

  constants : Lean.ConstMap

• Environment extensions. It also includes user-defined extensions.

  extensions : Array Lean.EnvExtensionState

• Constant names to be saved in the field extraConstNames at ModuleData. It contains auxiliary declaration names created by the code generator which are not in constants. When importing modules, we want to insert them at const2ModIdx.

  extraConstNames : Lean.NameSet

• The header contains additional information that is not updated often.

  header : Lean.EnvironmentHeader

An environment stores declarations provided by the user. The kernel currently supports different kinds of declarations such as definitions, theorems, and inductive families. Each has a unique identifier (i.e., Name), and can be parameterized by a sequence of universe parameters. A constant in Lean is just a reference to a ConstantInfo object. The main task of the kernel is to type check these declarations and refuse type incorrect ones. The kernel does not allow declarations containing metavariables and/or free variables to be added to an environment. Environments are never destructively updated.

The environment also contains a collection of extensions. For example, the simp theorems declared by users are stored in an environment extension. Users can declare new extensions using meta-programming.

instance Lean.instNonemptyEnvironment : Nonempty Lean.Environment

Equations

• Lean.instNonemptyEnvironment = Lean.instNonemptyEnvironment.proof_1

def Lean.Environment.addAux (env : Lean.Environment) (cinfo : Lean.ConstantInfo) : Lean.Environment

Equations

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

def Lean.Environment.addExtraName (env : Lean.Environment) (name : Lean.Name) : Lean.Environment

Save an extra constant name that is used to populate const2ModIdx when we import .olean files. We use this feature to save in which module an auxiliary declaration created by the code generator has been created.

Equations

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

@[export lean_environment_find]

def Lean.Environment.find? (env : Lean.Environment) (n : Lean.Name) : Option Lean.ConstantInfo

Equations

• Lean.Environment.find? env n = Lean.SMap.find?' env.constants n

def Lean.Environment.contains (env : Lean.Environment) (n : Lean.Name) : Bool

Equations

• Lean.Environment.contains env n = Lean.SMap.contains env.constants n

def Lean.Environment.imports (env : Lean.Environment) : Array Lean.Import

Equations

• Lean.Environment.imports env = env.header.imports

def Lean.Environment.allImportedModuleNames (env : Lean.Environment) : Array Lean.Name

Equations

• Lean.Environment.allImportedModuleNames env = env.header.moduleNames

@[export lean_environment_set_main_module]

def Lean.Environment.setMainModule (env : Lean.Environment) (m : Lean.Name) : Lean.Environment

Equations

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

@[export lean_environment_main_module]

def Lean.Environment.mainModule (env : Lean.Environment) : Lean.Name

Equations

• Lean.Environment.mainModule env = env.header.mainModule

def Lean.Environment.getModuleIdxFor? (env : Lean.Environment) (declName : Lean.Name) : Option Lean.ModuleIdx

Equations

• Lean.Environment.getModuleIdxFor? env declName = Lean.HashMap.find? env.const2ModIdx declName

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

Equations

• Lean.Environment.isConstructor env declName = match Lean.Environment.find? env declName with | some (Lean.ConstantInfo.ctorInfo val) => true | x => false

def Lean.Environment.getModuleIdx? (env : Lean.Environment) (moduleName : Lean.Name) : Option Lean.ModuleIdx

Equations

• Lean.Environment.getModuleIdx? env moduleName = Array.findIdx? env.header.moduleNames fun x => x == moduleName

inductive Lean.KernelException : Type

• unknownConstant: Lean.Environment → Lean.Name → Lean.KernelException
• alreadyDeclared: Lean.Environment → Lean.Name → Lean.KernelException
• declTypeMismatch: Lean.Environment → Lean.Declaration → Lean.Expr → Lean.KernelException
• declHasMVars: Lean.Environment → Lean.Name → Lean.Expr → Lean.KernelException
• declHasFVars: Lean.Environment → Lean.Name → Lean.Expr → Lean.KernelException
• funExpected: Lean.Environment → Lean.LocalContext → Lean.Expr → Lean.KernelException
• typeExpected: Lean.Environment → Lean.LocalContext → Lean.Expr → Lean.KernelException
• letTypeMismatch: Lean.Environment → Lean.LocalContext → Lean.Name → Lean.Expr → Lean.Expr → Lean.KernelException
• exprTypeMismatch: Lean.Environment → Lean.LocalContext → Lean.Expr → Lean.Expr → Lean.KernelException
• appTypeMismatch: Lean.Environment → Lean.LocalContext → Lean.Expr → Lean.Expr → Lean.Expr → Lean.KernelException
• invalidProj: Lean.Environment → Lean.LocalContext → Lean.Expr → Lean.KernelException
• other: String → Lean.KernelException

Exceptions that can be raised by the Kernel when type checking new declarations.

@[extern lean_add_decl]

opaque Lean.Environment.addDecl (env : Lean.Environment) (decl : Lean.Declaration) : Except Lean.KernelException Lean.Environment

Type check given declaration and add it to the environment

def Lean.ConstantInfo.instantiateTypeLevelParams (c : Lean.ConstantInfo) (ls : List Lean.Level) : Lean.Expr

Equations

• Lean.ConstantInfo.instantiateTypeLevelParams c ls = Lean.Expr.instantiateLevelParams (Lean.ConstantInfo.type c) (Lean.ConstantInfo.levelParams c) ls

def Lean.ConstantInfo.instantiateValueLevelParams! (c : Lean.ConstantInfo) (ls : List Lean.Level) : Lean.Expr

Equations

• Lean.ConstantInfo.instantiateValueLevelParams! c ls = Lean.Expr.instantiateLevelParams (Lean.ConstantInfo.value! c) (Lean.ConstantInfo.levelParams c) ls

structure Lean.EnvExtensionInterface : Type 1

• ext : Type → Type
• inhabitedExt : {σ : Type} → Inhabited σ → Inhabited (ext σ)
• registerExt : {σ : Type} → IO σ → IO (ext σ)
• setState : {σ : Type} → ext σ → Lean.Environment → σ → Lean.Environment
• modifyState : {σ : Type} → ext σ → Lean.Environment → (σ → σ) → Lean.Environment
• getState : {σ : Type} → [inst : Inhabited σ] → ext σ → Lean.Environment → σ
• mkInitialExtStates : IO (Array Lean.EnvExtensionState)
• ensureExtensionsSize : Lean.Environment → IO Lean.Environment

Interface for managing environment extensions.

instance Lean.instInhabitedEnvExtensionInterface : Inhabited Lean.EnvExtensionInterface

Equations

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

Unsafe implementation of EnvExtensionInterface

structure Lean.EnvExtensionInterfaceUnsafe.Ext (σ : Type) : Type

• idx : Nat
• mkInitial : IO σ

instance Lean.EnvExtensionInterfaceUnsafe.instInhabitedExt : {a : Type} → Inhabited (Lean.EnvExtensionInterfaceUnsafe.Ext a)

Equations

• Lean.EnvExtensionInterfaceUnsafe.instInhabitedExt = { default := { idx := default, mkInitial := default } }

def Lean.EnvExtensionInterfaceUnsafe.ensureExtensionsArraySize (env : Lean.Environment) : IO Lean.Environment

User-defined environment extensions are declared using the initialize command. This command is just syntax sugar for the init attribute. When we import lean modules, the vector stored at envExtensionsRef may increase in size because of user-defined environment extensions. When this happens, we must adjust the size of the env.extensions. This method is invoked when processing imports.

Equations

• Lean.EnvExtensionInterfaceUnsafe.ensureExtensionsArraySize env = Lean.EnvExtensionInterfaceUnsafe.ensureExtensionsArraySize.loop (Array.size env.extensions) env

partial def Lean.EnvExtensionInterfaceUnsafe.ensureExtensionsArraySize.loop (i : Nat) (env : Lean.Environment) : IO Lean.Environment

unsafe def Lean.EnvExtensionInterfaceUnsafe.setState {σ : Type} (ext : Lean.EnvExtensionInterfaceUnsafe.Ext σ) (env : Lean.Environment) (s : σ) : Lean.Environment

Equations

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

@[inline]

unsafe def Lean.EnvExtensionInterfaceUnsafe.modifyState {σ : Type} (ext : Lean.EnvExtensionInterfaceUnsafe.Ext σ) (env : Lean.Environment) (f : σ → σ) : Lean.Environment

Equations

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

unsafe def Lean.EnvExtensionInterfaceUnsafe.getState {σ : Type} [inst : Inhabited σ] (ext : Lean.EnvExtensionInterfaceUnsafe.Ext σ) (env : Lean.Environment) : σ

Equations

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

unsafe def Lean.EnvExtensionInterfaceUnsafe.registerExt {σ : Type} (mkInitial : IO σ) : IO (Lean.EnvExtensionInterfaceUnsafe.Ext σ)

Equations

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

def Lean.EnvExtensionInterfaceUnsafe.mkInitialExtStates : IO (Array Lean.EnvExtensionState)

Equations

• Lean.EnvExtensionInterfaceUnsafe.mkInitialExtStates = do let exts ← ST.Ref.get Lean.EnvExtensionInterfaceUnsafe.envExtensionsRef Array.mapM (fun ext => ext.mkInitial) exts

unsafe def Lean.EnvExtensionInterfaceUnsafe.imp : Lean.EnvExtensionInterface

Equations

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

@[implemented_by Lean.EnvExtensionInterfaceUnsafe.imp]

opaque Lean.EnvExtensionInterfaceImp : Lean.EnvExtensionInterface

def Lean.EnvExtension (σ : Type) : Type

Equations

• Lean.EnvExtension σ = Lean.EnvExtensionInterface.ext Lean.EnvExtensionInterfaceImp σ

instance Lean.EnvExtension.instInhabitedEnvExtension {σ : Type} [s : Inhabited σ] : Inhabited (Lean.EnvExtension σ)

Equations

• Lean.EnvExtension.instInhabitedEnvExtension = Lean.EnvExtensionInterface.inhabitedExt Lean.EnvExtensionInterfaceImp s

def Lean.EnvExtension.setState {σ : Type} (ext : Lean.EnvExtension σ) (env : Lean.Environment) (s : σ) : Lean.Environment

Equations

• Lean.EnvExtension.setState ext env s = Lean.EnvExtensionInterface.setState Lean.EnvExtensionInterfaceImp ext env s

def Lean.EnvExtension.modifyState {σ : Type} (ext : Lean.EnvExtension σ) (env : Lean.Environment) (f : σ → σ) : Lean.Environment

Equations

• Lean.EnvExtension.modifyState ext env f = Lean.EnvExtensionInterface.modifyState Lean.EnvExtensionInterfaceImp ext env f

def Lean.EnvExtension.getState {σ : Type} [inst : Inhabited σ] (ext : Lean.EnvExtension σ) (env : Lean.Environment) : σ

Equations

• Lean.EnvExtension.getState ext env = Lean.EnvExtensionInterface.getState Lean.EnvExtensionInterfaceImp ext env

def Lean.registerEnvExtension {σ : Type} (mkInitial : IO σ) : IO (Lean.EnvExtension σ)

Environment extensions can only be registered during initialization. Reasons: 1- Our implementation assumes the number of extensions does not change after an environment object is created. 2- We do not use any synchronization primitive to access envExtensionsRef.

Note that by default, extension state is not stored in .olean files and will not propagate across imports. For that, you need to register a persistent environment extension.

Equations

• Lean.registerEnvExtension mkInitial = Lean.EnvExtensionInterface.registerExt Lean.EnvExtensionInterfaceImp mkInitial

@[export lean_mk_empty_environment]

def Lean.mkEmptyEnvironment (trustLevel : optParam UInt32 0) : IO Lean.Environment

Equations

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

structure Lean.PersistentEnvExtensionState (α : Type) (σ : Type) : Type

• importedEntries : Array (Array α)
• state : σ

structure Lean.ImportM.Context : Type

• env : Lean.Environment
• opts : Lean.Options

@[inline]

abbrev Lean.ImportM (α : Type) : Type

Equations

• Lean.ImportM = ReaderT Lean.ImportM.Context IO

structure Lean.PersistentEnvExtension (α : Type) (β : Type) (σ : Type) : Type

• toEnvExtension : Lean.EnvExtension (Lean.PersistentEnvExtensionState α σ)
• name : Lean.Name
• addImportedFn : Array (Array α) → Lean.ImportM σ
• addEntryFn : σ → β → σ
• exportEntriesFn : σ → Array α
• statsFn : σ → Lean.Format

An environment extension with support for storing/retrieving entries from a .olean file.

• α is the type of the entries that are stored in .olean files.
• β is the type of values used to update the state.
• σ is the actual state.

Remark: for most extensions α and β coincide.

Note that addEntryFn is not in IO. This is intentional, and allows us to write simple functions such as

def addAlias (env : Environment) (a : Name) (e : Name) : Environment :=
aliasExtension.addEntry env (a, e)

without using IO. We have many functions like addAlias.

α and ‵β` do not coincide for extensions where the data used to update the state contains, for example, closures which we currently cannot store in files.

instance Lean.instInhabitedPersistentEnvExtensionState {α : Type} {σ : Type} [inst : Inhabited σ] : Inhabited (Lean.PersistentEnvExtensionState α σ)

Equations

• Lean.instInhabitedPersistentEnvExtensionState = { default := { importedEntries := #[], state := default } }

instance Lean.instInhabitedPersistentEnvExtension {α : Type} {β : Type} {σ : Type} [inst : Inhabited σ] : Inhabited (Lean.PersistentEnvExtension α β σ)

Equations

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

def Lean.PersistentEnvExtension.getModuleEntries {α : Type} {β : Type} {σ : Type} [inst : Inhabited σ] (ext : Lean.PersistentEnvExtension α β σ) (env : Lean.Environment) (m : Lean.ModuleIdx) : Array α

Equations

• Lean.PersistentEnvExtension.getModuleEntries ext env m = Array.get! (Lean.EnvExtension.getState ext.toEnvExtension env).importedEntries m

def Lean.PersistentEnvExtension.addEntry {α : Type} {β : Type} {σ : Type} (ext : Lean.PersistentEnvExtension α β σ) (env : Lean.Environment) (b : β) : Lean.Environment

Equations

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

def Lean.PersistentEnvExtension.getState {α : Type} {β : Type} {σ : Type} [inst : Inhabited σ] (ext : Lean.PersistentEnvExtension α β σ) (env : Lean.Environment) : σ

Get the current state of the given extension in the given environment.

Equations

• Lean.PersistentEnvExtension.getState ext env = (Lean.EnvExtension.getState ext.toEnvExtension env).state

def Lean.PersistentEnvExtension.setState {α : Type} {β : Type} {σ : Type} (ext : Lean.PersistentEnvExtension α β σ) (env : Lean.Environment) (s : σ) : Lean.Environment

Set the current state of the given extension in the given environment. This change is not persisted across files.

Equations

• Lean.PersistentEnvExtension.setState ext env s = Lean.EnvExtension.modifyState ext.toEnvExtension env fun ps => { importedEntries := ps.importedEntries, state := s }

def Lean.PersistentEnvExtension.modifyState {α : Type} {β : Type} {σ : Type} (ext : Lean.PersistentEnvExtension α β σ) (env : Lean.Environment) (f : σ → σ) : Lean.Environment

Modify the state of the given extension in the given environment by applying the given function. This change is not persisted across files.

Equations

• Lean.PersistentEnvExtension.modifyState ext env f = Lean.EnvExtension.modifyState ext.toEnvExtension env fun ps => { importedEntries := ps.importedEntries, state := f ps.state }

opaque Lean.persistentEnvExtensionsRef : IO.Ref (Array (Lean.PersistentEnvExtension Lean.EnvExtensionEntry Lean.EnvExtensionEntry Lean.EnvExtensionState))

structure Lean.PersistentEnvExtensionDescr (α : Type) (β : Type) (σ : Type) : Type

• name : autoParam Lean.Name _auto✝
• mkInitial : IO σ
• addImportedFn : Array (Array α) → Lean.ImportM σ
• addEntryFn : σ → β → σ
• exportEntriesFn : σ → Array α
• statsFn : σ → Lean.Format

unsafe def Lean.registerPersistentEnvExtensionUnsafe {α : Type} {β : Type} {σ : Type} [inst : Inhabited σ] (descr : Lean.PersistentEnvExtensionDescr α β σ) : IO (Lean.PersistentEnvExtension α β σ)

Equations

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

@[implemented_by Lean.registerPersistentEnvExtensionUnsafe]

opaque Lean.registerPersistentEnvExtension {α : Type} {β : Type} {σ : Type} [inst : Inhabited σ] (descr : Lean.PersistentEnvExtensionDescr α β σ) : IO (Lean.PersistentEnvExtension α β σ)

def Lean.SimplePersistentEnvExtension (α : Type) (σ : Type) : Type

Simple PersistentEnvExtension that implements exportEntriesFn using a list of entries.

Equations

• Lean.SimplePersistentEnvExtension α σ = Lean.PersistentEnvExtension α α (List α × σ)

@[specialize #[]]

def Lean.mkStateFromImportedEntries {α : Type} {σ : Type} (addEntryFn : σ → α → σ) (initState : σ) (as : Array (Array α)) : σ

Equations

• Lean.mkStateFromImportedEntries addEntryFn initState as = Array.foldl (fun r es => Array.foldl (fun r e => addEntryFn r e) r es 0 (Array.size es)) initState as 0 (Array.size as)

structure Lean.SimplePersistentEnvExtensionDescr (α : Type) (σ : Type) : Type

• name : autoParam Lean.Name _auto✝
• addEntryFn : σ → α → σ
• addImportedFn : Array (Array α) → σ
• toArrayFn : List α → Array α

def Lean.registerSimplePersistentEnvExtension {α : Type} {σ : Type} [inst : Inhabited σ] (descr : Lean.SimplePersistentEnvExtensionDescr α σ) : IO (Lean.SimplePersistentEnvExtension α σ)

Equations

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

instance Lean.SimplePersistentEnvExtension.instInhabitedSimplePersistentEnvExtension {α : Type} {σ : Type} [inst : Inhabited σ] : Inhabited (Lean.SimplePersistentEnvExtension α σ)

Equations

• Lean.SimplePersistentEnvExtension.instInhabitedSimplePersistentEnvExtension = inferInstanceAs (Inhabited (Lean.PersistentEnvExtension α α (List α × σ)))

def Lean.SimplePersistentEnvExtension.getEntries {α : Type} {σ : Type} [inst : Inhabited σ] (ext : Lean.SimplePersistentEnvExtension α σ) (env : Lean.Environment) : List α

Get the list of values used to update the state of the given SimplePersistentEnvExtension in the current file.

Equations

• Lean.SimplePersistentEnvExtension.getEntries ext env = (Lean.PersistentEnvExtension.getState ext env).fst

def Lean.SimplePersistentEnvExtension.getState {α : Type} {σ : Type} [inst : Inhabited σ] (ext : Lean.SimplePersistentEnvExtension α σ) (env : Lean.Environment) : σ

Get the current state of the given SimplePersistentEnvExtension.

Equations

• Lean.SimplePersistentEnvExtension.getState ext env = (Lean.PersistentEnvExtension.getState ext env).snd

def Lean.SimplePersistentEnvExtension.setState {α : Type} {σ : Type} (ext : Lean.SimplePersistentEnvExtension α σ) (env : Lean.Environment) (s : σ) : Lean.Environment

Set the current state of the given SimplePersistentEnvExtension. This change is not persisted across files.

Equations

• Lean.SimplePersistentEnvExtension.setState ext env s = Lean.PersistentEnvExtension.modifyState ext env fun x => match x with | (entries, snd) => (entries, s)

def Lean.SimplePersistentEnvExtension.modifyState {α : Type} {σ : Type} (ext : Lean.SimplePersistentEnvExtension α σ) (env : Lean.Environment) (f : σ → σ) : Lean.Environment

Modify the state of the given extension in the given environment by applying the given function. This change is not persisted across files.

Equations

• Lean.SimplePersistentEnvExtension.modifyState ext env f = Lean.PersistentEnvExtension.modifyState ext env fun x => match x with | (entries, s) => (entries, f s)

def Lean.TagDeclarationExtension : Type

Environment extension for tagging declarations. Declarations must only be tagged in the module where they were declared.

Equations

• Lean.TagDeclarationExtension = Lean.SimplePersistentEnvExtension Lean.Name Lean.NameSet

def Lean.mkTagDeclarationExtension (name : autoParam Lean.Name _auto✝) : IO Lean.TagDeclarationExtension

Equations

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

instance Lean.TagDeclarationExtension.instInhabitedTagDeclarationExtension : Inhabited Lean.TagDeclarationExtension

Equations

• Lean.TagDeclarationExtension.instInhabitedTagDeclarationExtension = inferInstanceAs (Inhabited (Lean.SimplePersistentEnvExtension Lean.Name Lean.NameSet))

def Lean.TagDeclarationExtension.tag (ext : Lean.TagDeclarationExtension) (env : Lean.Environment) (declName : Lean.Name) : Lean.Environment

Equations

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

def Lean.TagDeclarationExtension.isTagged (ext : Lean.TagDeclarationExtension) (env : Lean.Environment) (declName : Lean.Name) : Bool

Equations

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

def Lean.MapDeclarationExtension (α : Type) : Type

Environment extension for mapping declarations to values. Declarations must only be inserted into the mapping in the module where they were declared.

Equations

• Lean.MapDeclarationExtension α = Lean.SimplePersistentEnvExtension (Lean.Name × α) (Lean.NameMap α)

def Lean.mkMapDeclarationExtension {α : Type} [inst : Inhabited α] (name : autoParam Lean.Name _auto✝) : IO (Lean.MapDeclarationExtension α)

Equations

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

instance Lean.MapDeclarationExtension.instInhabitedMapDeclarationExtension {α : Type} : Inhabited (Lean.MapDeclarationExtension α)

Equations

• Lean.MapDeclarationExtension.instInhabitedMapDeclarationExtension = inferInstanceAs (Inhabited (Lean.SimplePersistentEnvExtension (Lean.Name × α) (Lean.NameMap α)))

def Lean.MapDeclarationExtension.insert {α : Type} (ext : Lean.MapDeclarationExtension α) (env : Lean.Environment) (declName : Lean.Name) (val : α) : Lean.Environment

Equations

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

def Lean.MapDeclarationExtension.find? {α : Type} [inst : Inhabited α] (ext : Lean.MapDeclarationExtension α) (env : Lean.Environment) (declName : Lean.Name) : Option α

Equations

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

def Lean.MapDeclarationExtension.contains {α : Type} [inst : Inhabited α] (ext : Lean.MapDeclarationExtension α) (env : Lean.Environment) (declName : Lean.Name) : Bool

Equations

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

@[extern lean_save_module_data]

opaque Lean.saveModuleData (fname : System.FilePath) (mod : Lean.Name) (data : Lean.ModuleData) : IO Unit

@[extern lean_read_module_data]

opaque Lean.readModuleData (fname : System.FilePath) : IO (Lean.ModuleData × Lean.CompactedRegion)

@[noinline, export lean_environment_free_regions]

unsafe def Lean.Environment.freeRegions (env : Lean.Environment) : IO Unit

Free compacted regions of imports. No live references to imported objects may exist at the time of invocation; in particular, env should be the last reference to any Environment derived from these imports.

Equations

• Lean.Environment.freeRegions env = Array.forM Lean.CompactedRegion.free env.header.regions 0 (Array.size env.header.regions)

def Lean.mkModuleData (env : Lean.Environment) : IO Lean.ModuleData

Equations

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

@[export lean_write_module]

def Lean.writeModule (env : Lean.Environment) (fname : System.FilePath) : IO Unit

Equations

• Lean.writeModule env fname = do let __do_lift ← Lean.mkModuleData env Lean.saveModuleData fname (Lean.Environment.mainModule env) __do_lift

@[extern 2 lean_update_env_attributes]

opaque Lean.updateEnvAttributes : Lean.Environment → IO Lean.Environment

"Forward declaration" needed for updating the attribute table with user-defined attributes. User-defined attributes are declared using the initialize command. The initialize command is just syntax sugar for the init attribute. The init attribute is initialized after the attributeExtension is initialized. We cannot change the order since the init attribute is an attribute, and requires this extension. The attributeExtension initializer uses attributeMapRef to initialize the attribute mapping. When we a new user-defined attribute declaration is imported, attributeMapRef is updated. Later, we set this method with code that adds the user-defined attributes that were imported after we initialized attributeExtension.

@[extern 1 lean_get_num_attributes]

opaque Lean.getNumBuiltinAttributes : IO Nat

"Forward declaration" for retrieving the number of builtin attributes.

structure Lean.ImportState : Type

• moduleNameSet : Lean.NameHashSet
• moduleNames : Array Lean.Name
• moduleData : Array Lean.ModuleData
• regions : Array Lean.CompactedRegion

def Lean.throwAlreadyImported {α : Type} (s : Lean.ImportState) (const2ModIdx : Lean.HashMap Lean.Name Lean.ModuleIdx) (modIdx : Nat) (cname : Lean.Name) : IO α

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@[export lean_import_modules]

def Lean.importModules (imports : List Lean.Import) (opts : Lean.Options) (trustLevel : optParam UInt32 0) : IO Lean.Environment

Equations

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partial def Lean.importModules.importMods : List Lean.Import → StateRefT' IO.RealWorld Lean.ImportState IO Unit

unsafe def Lean.withImportModules {α : Type} (imports : List Lean.Import) (opts : Lean.Options) (trustLevel : optParam UInt32 0) (x : Lean.Environment → IO α) : IO α

Create environment object from imports and free compacted regions after calling act. No live references to the environment object or imported objects may exist after act finishes.

Equations

• Lean.withImportModules imports opts trustLevel x = do let env ← Lean.importModules imports opts trustLevel tryFinally (x env) (Lean.Environment.freeRegions env)

opaque Lean.namespacesExt : Lean.SimplePersistentEnvExtension Lean.Name Lean.NameSSet

Environment extension for tracking all namespace declared by users.

def Lean.Environment.registerNamespace (env : Lean.Environment) (n : Lean.Name) : Lean.Environment

Register a new namespace in the environment.

Equations

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def Lean.Environment.isNamespace (env : Lean.Environment) (n : Lean.Name) : Bool

Return true if n is the name of a namespace in env.

Equations

• Lean.Environment.isNamespace env n = Lean.NameSSet.contains (Lean.SimplePersistentEnvExtension.getState Lean.namespacesExt env) n

def Lean.Environment.getNamespaceSet (env : Lean.Environment) : Lean.NameSSet

Return a set containing all namespaces in env.

Equations

• Lean.Environment.getNamespaceSet env = Lean.SimplePersistentEnvExtension.getState Lean.namespacesExt env

@[export lean_environment_add]

def Lean.Environment.add (env : Lean.Environment) (cinfo : Lean.ConstantInfo) : Lean.Environment

Equations

• Lean.Environment.add env cinfo = let env := Lean.Environment.registerNamePrefixes env (Lean.ConstantInfo.name cinfo); Lean.Environment.addAux env cinfo

@[export lean_display_stats]

def Lean.Environment.displayStats (env : Lean.Environment) : IO Unit

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@[extern lean_eval_const]

unsafe opaque Lean.Environment.evalConst (α : Type u_1) (env : Lean.Environment) (opts : Lean.Options) (constName : Lean.Name) : Except String α

Evaluate the given declaration under the given environment to a value of the given type. This function is only safe to use if the type matches the declaration's type in the environment and if enableInitializersExecution has been used before importing any modules.

unsafe def Lean.Environment.evalConstCheck (α : Type) (env : Lean.Environment) (opts : Lean.Options) (typeName : Lean.Name) (constName : Lean.Name) : ExceptT String Id α

Like evalConst, but first check that constName indeed is a declaration of type typeName. Note that this function cannot guarantee that typeName is in fact the name of the type α.

Equations

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def Lean.Environment.hasUnsafe (env : Lean.Environment) (e : Lean.Expr) : Bool

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Kernel API

@[extern lean_kernel_is_def_eq]

opaque Lean.Kernel.isDefEq (env : Lean.Environment) (lctx : Lean.LocalContext) (a : Lean.Expr) (b : Lean.Expr) : Except Lean.KernelException Bool

Kernel isDefEq predicate. We use it mainly for debugging purposes. Recall that the Kernel type checker does not support metavariables. When implementing automation, consider using the MetaM methods.

def Lean.Kernel.isDefEqGuarded (env : Lean.Environment) (lctx : Lean.LocalContext) (a : Lean.Expr) (b : Lean.Expr) : Bool

Equations

• Lean.Kernel.isDefEqGuarded env lctx a b = match Lean.Kernel.isDefEq env lctx a b with | Except.ok result => result | x => false

@[extern lean_kernel_whnf]

opaque Lean.Kernel.whnf (env : Lean.Environment) (lctx : Lean.LocalContext) (a : Lean.Expr) : Except Lean.KernelException Lean.Expr

Kernel WHNF function. We use it mainly for debugging purposes. Recall that the Kernel type checker does not support metavariables. When implementing automation, consider using the MetaM methods.

class Lean.MonadEnv (m : Type → Type) : Type

• getEnv : m Lean.Environment
• modifyEnv : (Lean.Environment → Lean.Environment) → m Unit

@[always_inline]

instance Lean.instMonadEnv (m : Type → Type) (n : Type → Type) [inst : MonadLift m n] [inst : Lean.MonadEnv m] : Lean.MonadEnv n

Equations

• Lean.instMonadEnv m n = { getEnv := liftM Lean.getEnv, modifyEnv := fun f => liftM (Lean.modifyEnv f) }