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

Opaque environment extension state.

def Lean.EnvExtensionState : Type

instance Lean.instInhabitedEnvExtensionState : Inhabited Lean.EnvExtensionState

def Lean.ModuleIdx : Type

@[inline, reducible]

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

instance Lean.instInhabitedModuleIdx : Inhabited Lean.ModuleIdx

@[inline, reducible]

abbrev Lean.ConstMap : Type

structure Lean.Import : Type

• module : Lake.Name
• runtimeOnly : Bool

instance Lean.instReprImport : Repr Lean.Import

instance Lean.instInhabitedImport : Inhabited Lean.Import

instance Lean.instCoeNameImport : Coe Lake.Name Lean.Import

instance Lean.instToStringImport : ToString Lean.Import

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.

@[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

instance Lean.instNonemptyEnvExtensionEntry : Nonempty Lean.EnvExtensionEntry

structure Lean.ModuleData : Type

• imports : Array Lean.Import
• constNames : Array Lake.Name

  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

• constants : Array Lean.ConstantInfo
• extraConstNames : Array Lake.Name

  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.

• entries : Array (Lake.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

structure Lean.EnvironmentHeader : Type

• trustLevel : UInt32

  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.

• quotInit : Bool

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

• mainModule : Lake.Name

  Name of the module being compiled.

• imports : Array Lean.Import

  Direct imports

• regions : Array Lean.CompactedRegion

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

• moduleNames : Array Lake.Name

  Name of all imported modules (directly and indirectly).

• moduleData : Array Lean.ModuleData

  Module data for all imported modules.

Environment fields that are not used often.

instance Lean.instNonemptyEnvironmentHeader : Nonempty Lean.EnvironmentHeader

structure Lean.Environment : Type

• const2ModIdx : Lean.HashMap Lake.Name Lean.ModuleIdx

  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.

• constants : Lean.ConstMap

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

• extensions : Array Lean.EnvExtensionState

  Environment extensions. It also includes user-defined extensions.

• extraConstNames : Lean.NameSet

  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.

• header : Lean.EnvironmentHeader

  The header contains additional information that is not updated often.

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

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

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

@[export lean_environment_find]

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

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

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

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

@[export lean_environment_set_main_module]

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

@[export lean_environment_main_module]

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

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

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

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

inductive Lean.KernelException : Type

• unknownConstant: Lean.Environment → Lake.Name → Lean.KernelException
• alreadyDeclared: Lean.Environment → Lake.Name → Lean.KernelException
• declTypeMismatch: Lean.Environment → Lean.Declaration → Lean.Expr → Lean.KernelException
• declHasMVars: Lean.Environment → Lake.Name → Lean.Expr → Lean.KernelException
• declHasFVars: Lean.Environment → Lake.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 → Lake.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
• deterministicTimeout: Lean.KernelException
• excessiveMemory: Lean.KernelException
• deepRecursion: 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

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

structure Lean.EnvExtensionInterface : Type 1

• ext : Type → Type
• inhabitedExt : {σ : Type} → Inhabited σ → Inhabited (Lean.EnvExtensionInterface.ext s σ)
• registerExt : {σ : Type} → IO σ → IO (Lean.EnvExtensionInterface.ext s σ)
• setState : {σ : Type} → Lean.EnvExtensionInterface.ext s σ → Lean.Environment → σ → Lean.Environment
• modifyState : {σ : Type} → Lean.EnvExtensionInterface.ext s σ → Lean.Environment → (σ → σ) → Lean.Environment
• getState : {σ : Type} → [inst : Inhabited σ] → Lean.EnvExtensionInterface.ext s 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

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)

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.

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

@[inline]

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

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

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

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

unsafe def Lean.EnvExtensionInterfaceUnsafe.imp : Lean.EnvExtensionInterface

@[implemented_by Lean.EnvExtensionInterfaceUnsafe.imp]

opaque Lean.EnvExtensionInterfaceImp : Lean.EnvExtensionInterface

def Lean.EnvExtension (σ : Type) : Type

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

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

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

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

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.

@[export lean_mk_empty_environment]

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

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, reducible]

abbrev Lean.ImportM (α : Type) : Type

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

• toEnvExtension : Lean.EnvExtension (Lean.PersistentEnvExtensionState α σ)
• name : Lake.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} [Inhabited σ] : Inhabited (Lean.PersistentEnvExtensionState α σ)

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

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

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

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

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

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.

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.

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 : Lake.Name
• 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} [Inhabited σ] (descr : Lean.PersistentEnvExtensionDescr α β σ) : IO (Lean.PersistentEnvExtension α β σ)

@[implemented_by Lean.registerPersistentEnvExtensionUnsafe]

opaque Lean.registerPersistentEnvExtension {α : Type} {β : Type} {σ : Type} [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.

@[specialize #[]]

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

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

• name : Lake.Name
• addEntryFn : σ → α → σ
• addImportedFn : Array (Array α) → σ
• toArrayFn : List α → Array α

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

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

def Lean.SimplePersistentEnvExtension.getEntries {α : Type} {σ : Type} [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.

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

Get the current state of the given SimplePersistentEnvExtension.

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.

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.

def Lean.TagDeclarationExtension : Type

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

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

instance Lean.TagDeclarationExtension.instInhabitedTagDeclarationExtension : Inhabited Lean.TagDeclarationExtension

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

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

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.

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

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

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

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

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

@[extern lean_save_module_data]

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

@[extern lean_read_module_data]

opaque Lean.readModuleData (fname : Lake.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.

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

@[export lean_write_module]

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

@[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 Lake.Name
• moduleData : Array Lean.ModuleData
• regions : Array Lean.CompactedRegion

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

@[inline, reducible]

abbrev Lean.ImportStateM (α : Type) : Type

@[inline]

def Lean.ImportStateM.run {α : Type} (x : Lean.ImportStateM α) (s : optParam Lean.ImportState { moduleNameSet := ∅, moduleNames := #[], moduleData := #[], regions := #[] }) : IO (α × Lean.ImportState)

partial def Lean.importModulesCore (imports : Array Lean.Import) : Lean.ImportStateM Unit

def Lean.finalizeImport (s : Lean.ImportState) (imports : Array Lean.Import) (opts : Lean.Options) (trustLevel : optParam UInt32 0) : IO Lean.Environment

@[export lean_import_modules]

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

unsafe def Lean.withImportModules {α : Type} (imports : Array 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.

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

Environment extension for tracking all namespace declared by users.

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

Register a new namespace in the environment.

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

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

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

Return a set containing all namespaces in env.

@[export lean_environment_add]

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

@[export lean_display_stats]

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

@[extern lean_eval_const]

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

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

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

@[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) [MonadLift m n] [Lean.MonadEnv m] : Lean.MonadEnv n