Crate deno_core

Re-exports

• pub use crate::error::GetErrorClassFn;
• pub use crate::error::JsErrorCreateFn;
• pub use crate::external::ExternalDefinition;
• pub use anyhow;
• pub use deno_unsync as unsync;
• pub use futures;
• pub use parking_lot;
• pub use serde;
• pub use serde_json;
• pub use serde_v8;
• pub use sourcemap;
• pub use url;
• pub use v8;

Modules

• error
• snapshot_util

Macros

• ascii_str
  Include a fast string in the binary from a string literal. This string is asserted at compile-time to be 7-bit ASCII for optimal v8 performance.
• extension
  Defines a Deno extension. The first parameter is the name of the extension symbol namespace to create. This is the symbol you will use to refer to the extension.
• external
  Define an external type.
• impl_readable_byob
• impl_writable
• include_ascii_string
  Include a fast string in the binary. This string is asserted at compile-time to be 7-bit ASCII for optimal v8 performance.
• include_js_files
  Helps embed JS files in an extension. Returns a vector of ExtensionFileSource, that represent the filename and source code. All specified files are rewritten into “ext:<extension_name>/<file_name>”.
• located_script_name
  A helper macro that will return a call site in Rust code. Should be used when executing internal one-line scripts for JsRuntime lifecycle.
• ops
  Declares a block of Deno #[op]s. The first parameter determines the name of the op declaration block, and is usually deno_ops. This block generates a function that returns a Vec<OpDecl>.
• or
  Return the first argument if not empty, otherwise the second.

Structs

• AsyncRefCell
• BufMutView
  BufMutView is a wrapper around an underlying contiguous chunk of writable bytes. It can be created from a JsBuffer or a Vec<u8> and implements DerefMut<[u8]> and AsMut<[u8]>.
• BufView
  BufView is a wrapper around an underlying contiguous chunk of bytes. It can be created from a JsBuffer, bytes::Bytes, or Vec and implements Deref<[u8]> and AsRef<[u8]>.
• ByteString
• CancelHandle
• Canceled
• CreateRealmOptions
• CrossIsolateStore
• DetachedBuffer
• Extension
• ExtensionBuilder
• ExtensionFileSource
• ExternalPointer
  A strongly-typed external pointer. As this is a shared pointer, it only provides immutable references to the underlying data. To allow for interior mutation, use an interior-mutable container such as [RefCell].
• FeatureChecker
• FsModuleLoader
  Basic file system module loader.
• InspectorMsg
• InspectorSessionProxy
  Encapsulates an UnboundedSender/UnboundedReceiver pair that together form a duplex channel for sending/receiving messages in V8 session.
• JsBuffer
• JsRuntime
  A single execution context of JavaScript. Corresponds roughly to the “Web Worker” concept in the DOM. The JsRuntime future completes when there is an error or when all pending ops have completed.
• JsRuntimeForSnapshot
  The runtime type used for snapshot creation.
• JsRuntimeInspector
  This structure is used responsible for providing inspector interface to the JsRuntime.
• LocalInspectorSession
  A local inspector session that can be used to send and receive protocol messages directly on the same thread as an isolate.
• ModuleSource
  EsModule source code that will be loaded into V8.
• NoopModuleLoader
  Placeholder structure used when creating a runtime that doesn’t support module loading.
• OpDecl
• OpError
• OpMetricsSummary
  Used for both aggregate and per-op metrics.
• OpMetricsSummaryTracker
• OpState
  Maintains the resources and ops inside a JS runtime.
• PollEventLoopOptions
• RcRef
  An RcRef encapsulates a reference counted pointer, just like a regular std::rc::Rc. However, unlike a regular Rc, it can be remapped so that it dereferences to any value that’s reachable through the reference-counted pointer. This is achieved through the associated method, RcRef::map(), similar to how std::cell::Ref::map() works. Example:
• ResourceTable
  Map-like data structure storing Deno’s resources (equivalent to file descriptors).
• RuntimeOptions
• StaticModuleLoader
  A module loader that you can pre-load a number of modules into and resolve from. Useful for testing and embedding situations where the filesystem and snapshot systems are not usable or a good fit.
• ToJsBuffer
• TryCancelable
• U16String
• V8CrossThreadTaskSpawner
  Allows for submission of v8 tasks on any thread.
• V8TaskSpawner
  Allows for submission of v8 tasks on the same thread.
• op_close
  Remove a resource from the resource table.
• op_print
  Builtin utility to print to stdout/stderr
• op_resources
  Return map of resources with id as key and string representation as value.
• op_void_async
• op_void_sync

Enums

• Cancelable
• ExtensionFileSourceCode
• FastString
  Module names and code can be sourced from strings or bytes that are either owned or borrowed. This enumeration allows us to perform a minimal amount of cloning and format-shifting of the underlying data.
• InspectorMsgKind
• ModuleResolutionError
  Error indicating the reason resolving a module specifier failed.
• ModuleType
  A type of module to be executed.
• OpMetricsEvent
  The type of op metrics event.
• OpMetricsSource
• OpResult
• ResolutionKind
• ResourceHandle
  Represents an underlying handle for a platform. On unix, everything is an fd. On Windows, everything is a Windows handle except for sockets (which are SOCKETs).
• Snapshot
• StringOrBuffer
• WriteOutcome

Constants

• V8_WRAPPER_OBJECT_INDEX
• V8_WRAPPER_TYPE_INDEX

Traits

• CancelFuture
• CancelTryFuture
• Externalizable
• ModuleLoader
• Op
  Trait implemented by all generated ops.
• RcLike
  The RcLike trait provides an abstraction over std::rc::Rc and RcRef, so that applicable methods can operate on either type.
• Resource
  Resources are Rust objects that are attached to a deno_core::JsRuntime. They are identified in JS by a numeric ID (the resource ID, or rid). Resources can be created in ops. Resources can also be retrieved in ops by their rid. Resources are not thread-safe - they can only be accessed from the thread that the JsRuntime lives on.
• SourceMapGetter

Functions

• merge_op_metrics
  Given two OpMetricsFactoryFn implementations, merges them so that op metric events are called on both.
• normalize_path
  Normalize all intermediate components of the path (ie. remove “./” and “../” components). Similar to fs::canonicalize() but doesn’t resolve symlinks.
• resolve_import
  Resolves module using this algorithm: https://html.spec.whatwg.org/multipage/webappapis.html#resolve-a-module-specifier
• resolve_path
  Converts a string representing a relative or absolute path into a ModuleSpecifier. A relative path is considered relative to the passed current_dir.
• resolve_url
  Converts a string representing an absolute URL into a ModuleSpecifier.
• resolve_url_or_path
  Takes a string representing either an absolute URL or a file path, as it may be passed to deno as a command line argument. The string is interpreted as a URL if it starts with a valid URI scheme, e.g. ‘http:’ or ‘file:’ or ‘git+ssh:’. If not, it’s interpreted as a file path; if it is a relative path it’s resolved relative to passed current_dir.
• strip_unc_prefix
• v8_set_flags
  Pass the command line arguments to v8. The first element of args (which usually corresponds to the binary name) is ignored. Returns a vector of command line arguments that V8 did not understand.
• v8_version

Type Aliases

• AsyncMut
• AsyncMutFuture
• AsyncRef
• AsyncRefFuture
• AsyncResult
  Returned by resource read/write/shutdown methods
• CompiledWasmModuleStore
• ExtModuleLoaderCb
  Function that can be passed to the ExtModuleLoader that allows to transpile sources before passing to V8.
• ModuleCode
• ModuleId
• ModuleSourceFuture
• ModuleSpecifier
  Resolved module specifier
• OpId
• OpMetricsFactoryFn
  A callback to retrieve an optional OpMetricsFn for this op.
• OpMetricsFn
  A callback to receieve an OpMetricsEvent.
• OpMiddlewareFn
• PromiseId
• ResourceHandleFd
• ResourceHandleSocket
• ResourceId
  A ResourceId is an integer value referencing a resource. It could be considered to be the Deno equivalent of a file descriptor in POSIX like operating systems. Elsewhere in the code base it is commonly abbreviated to rid.
• SharedArrayBufferStore
• ValidateImportAttributesCb
  Callback to validate import attributes. If the validation fails and exception should be thrown using scope.throw_exception().

Attribute Macros

• op2
  A macro designed to provide an extremely fast V8->Rust interface layer.