* Fix Logger's name in stdlib
Somehow SLF4J is able to recognize correctly the provided Logger's name
and print it to the user. Java's Logger is
not.
In addition, we setup SLF4J's configuration, meaning that log-levels are
correctly respected.
For a simple project:
```
from Standard.Base import all
from Standard.Base.Logging import all
type Foo
main =
IO.println "Hello World!"
Foo.log_message level=..Warning "I should warn you about something..."
Foo.log_message level=..Info "Should be seen? By default we only show up-to warnings level"
Foo.log_message level=..Severe "Something went really bad!"
```
This change demonstrates the fix.
Before:
```
> enso --run simple-logging.enso
Hello World!
Nov 08, 2024 6:08:07 PM com.oracle.truffle.host.HostMethodDesc$SingleMethod$MHBase invokeHandle
WARNING: I should warn you about something...
Nov 08, 2024 6:08:07 PM com.oracle.truffle.host.HostMethodDesc$SingleMethod$MHBase invokeHandle
INFO: Should be seen? By default we only show up-to warnings level
Nov 08, 2024 6:08:07 PM com.oracle.truffle.host.HostMethodDesc$SingleMethod$MHBase invokeHandle
SEVERE: Something went really bad!
Foo
```
After:
```
> enso --run simple-logging.enso
Hello World!
[WARN] [2024-11-08T18:03:37+01:00] [simple-logging.Foo] I should warn you about something...
[ERROR] [2024-11-08T18:03:37+01:00] [simple-logging.Foo] Something went really bad!
Foo
```
* Update distribution/lib/Standard/Base/0.0.0-dev/src/Logging.enso
Co-authored-by: Radosław Waśko <radoslaw.wasko@enso.org>
* Test stdlib logs by using MemoryAppender
Added `getEvents` member to `MemoryAppender` so that it is possible to
retrieve individual log messages from tests and test their presence.
Required opening up to some modules to retrieve internals of loggers.
* nit
* small tweaks to eliminate module warnings
---------
Co-authored-by: Radosław Waśko <radoslaw.wasko@enso.org>
`MetadataStorage` is mutable. Using `Object.equals` in `IR.copy` methods to check whether a _copy is needed_ isn't enough. The fact that two storages are `Object.equal` may be just temporary. Replacing the checks in 69 `IR.copy` methods with identity check - e.g. `ne` in Scala which is `==` in Java.
Using proper structural check inside of `MetadataStorage` fixes#11171.
# Important Notes
I [used this regex](https://github.com/enso-org/enso/issues/11171#issuecomment-2463908932) to find out 69 instances of `IR.copy`:
and I modified all 69 of them.
* Don't cancel aborted jobs immediately
Rather than cancelling Futures that capture jobs' logic,
this change introduces a two-level system:
- interrupt all jobs softly via ThreadInterrupted at safepoints
- if safepoint is not executed within some time period or it is
but the job is still not cancelled, trigger a hard-interrupt
by cancelling the job explicitly, if possible
Closes#11084.
* Only cancel Future when you mean it
Soft-cancelling a future only to later call it with `mayInterrupt` set
to `true` has no effect in the latter case.
Changed the logic so that interrupting a Future will really enforce it.
Ocassionally some commands should not attempt to run soft cancellations
- we know they will re-execute the program.
* Replace Thread.sleep with Future.get
No while loops etc, it's much easier to reason about what is soft and
hard interrupt supposed to do.
* Better comments/logs
* nit
* PR review
* Make test more robust
Move documentation into documentable types (implements #11302).
# Important Notes
GUI:
- Distinguish expression and statement
- `Ast.Ast` is still present, as the base class for AST objects. Most references to `Ast.Ast` are now references to `Ast.Expression`. Operations on blocks use `Ast.Statement`.
- `Ast.parse` has been replaced with: `Ast.parseExpression`, `Ast.parseStatement`, and `Ast.parseBlock`
- `syncToCode` is internally context-aware; it parses the provided code appropriately depending on whether its AST is an expression, a statement, or the top level of a module.
- Remove `wrappingExpression` / `innerExpression` APIs: Wrapper types have been eliminated; modifier lines are now fields inside parent types.
- Simplify AST printing:
- Fully implemented autospacing in `concreteChildren` implementations; the type returned by `concreteChildren` now ensures that spacing has been fully resolved.
- Eliminate `printBlock` / `printDocs`: `concreteChildren` is now aware of indentation context, and responsible for indentation of its child lines.
- The `Pattern` type is now parameterized to identify the AST type it constructs. The `Pattern.parseExpression` function helps create a `Pattern<Expression>`.
- Refactor `performCollape` for testability.
- e2e tests: Improve table viz test: It still doesn't pass on my Mac, but these changes are necessary if not sufficient.
Compiler (TreeToIr):
- An expression in statement context is now found in an `ExpressionStatement` wrapper.
- Documentation for a `Function` is now found inside the function node.
- Deduplicate some polyglot-function logic.
close#10757
Changelog:
- add: native-image configuration to the `ydoc-server` project
- add: native-image overrides for loom executors replacing them with platform threads
- update: Helidon `4.1.2`
- fix: issues related to the native-image build
`Meta.get_qualified_type_name` correctly returns fully qualified type name when running a single file from a project with `enso --run Proj/src/Main.enso`.
Move annotations into fields of Function and ConstructorDefinition.
# Important Notes
New syntax: Constructor argument-definition lines
- Each argument in a type-constructor definition may be specified on its own (indented) line.
Relaxed syntax: Unparenthesized arguments to annotations
- A generic annotation now uses the rest of the line as its argument expression; the expression no longer needs to be parenthesized.
Eliminate `private` modifier-node: `private` is a field in supporting types, or a single-token node in the case of `private` declarations.
# Important Notes
- Rust parser tests: Switch to a builder-style API for defining expected `Function` ASTs to allow further changes to `Function` fields without rewriting all the tests again.
- TreeToIr: Fix discarded module-level `diag`; add a test that covers module diagnostics.
- Syntax: Disallow `private` methods in function blocks. (Previously this was enforced in the compiler.)
Align `Assignment`/`Function` distinction in AST with compiler's implemented semantics:
- The ambiguous case `funcOrVar = expression` is now parsed as a `Function` when in a `Type` definition or in the top level of a module. I.e. it is an `Assignment` in contexts where the RHS is evaluated immediately when the binding is evaluated, and a `Function` in contexts where the RHS is evaluated each time the bound name is evaluated.
- `Assignment` statements now may only occur in function bodies.
Correcting this distinction lays the groundwork for #11302.
Other changes:
- Fixed incorrect source code locations for negative literals and negated expressions.
# Important Notes
New APIs:
- The parser now exposes a `parse_block` entry point, which allows parsing input lines as if in the body of a function. The previous entry point has been renamed to `parse_module`.
* Ensure wrapper projects are listed in aggregates
Previously, doing clean to deal with weird modularization failures would
have no effect.
* And updated formatting
* More projects
As cherry-picked from https://github.com/enso-org/enso/pull/11321
The fonts were added (by mistake) anyway, but they are rarely changed, and the scripts add unnecessary complexity.
This also fixes some post- #11287 problems.
Fixes#10668Fixes#8484
Summary of changes:
* `gui2` and `dashboard` are merged to `gui` directory. Various configs were merged (package.json, playwrigth, TS...). The src and e2e directories are split to `dashboard` and `project-view` for now.
* E2E tests run two servers on different ports. The tests are organized in projects. This is also to be changed soon, as we plan to [use better mocking in GUI/ProjectView](#9726)
* ESlint configs were merged to central `eslint.config.mjs`, and that file was moved to repository root. We kept the dashboard lints, but they can be relaxed. The dashboard code was changed to meet GUI lints.
* Also, the versions of linter plugins were bumped, and code fixed.
* The ide-desktop/client no longer has `dashboard` dependency - the only type used there was moved to common package.
* `common` package moved to `app`.
Stateless (static) parser interface. Buffer-reuse optimization is now hidden within `Parser` implementation. Fixes#11121 and prevents similar bugs.
# Important Notes
- Also simplify `EnsoParser` API, exposing only a higher-level interface.
* Use moduleDependencies instead of modulePath
* Fix compilation of editions
* Fix compilation of distribution-manager
* polyglot-api needs to explicitly compile module-info
* Fix compilationOrder in library-manager and edition-updater
* engine-runner-common is module
* JPMSPlugin provides default implementation of compileModuleInfo
* Remove unused setting key from JPMSUtils.compileModuleInfo
* JPMSPlugin has internalModuleDependencies and exportedModule tasks.
* Use BuildVersion instead of buildInfo
* Manual compilation of module-info.java is reported as warning
* Define org.enso.scalalibs.wrapper meta project.
* Fix module check in JPMSPlugin.
This is a fix for projects that declare `Compile /exportJars := true`
* version-output is a module
* ydoc-server uses internalModuleDependencies
* persistance is module
* engine-common uses internalModuleDependencies
* polyglot-api does not override compileModuleInfo task
* runtime-parser uses internalModuleDependencies
* edition-updater is module
* Update moduleDependencies for distribution-manager
* editions is module
* Fix some dependencies of modules
* scala-yaml is a module
* Add scala-compiler to scala-libs-wrapper
* cli depends on scala-library module
* Add dependencies for distribution-manager module
* Add some scala-library dependencies in some modules
* engine-runner uses internalModuleDependencies
* Fix module dependencies of library-manager
* Rename org.enso.scalalibs.wrapper to org.enso.scala.wrapper
* Add jsoniter-scala-macros to org.enso.scala.wrapper fat module
* Fix dependencies of some projects
* polyglot-api does not depend on truffle-api
* Fix dependencies of some projects
* runtime does not use com.google.common
* runtime is a module
* text-buffer is a module
* refactoring-utils is a module
* runtime-compiler is a module
* runtime-instrument-common is a module
* connected-lock-manager is a module
* JPMSUtils reports project name in some error messages
* Modularize some instruments
* module-info compilation is cached
* runtime-instrument-runtime-server is module
* runtime-language-epb is module
* Remove runtime-fat-jar
* engine-runner is not a fat jar
* JPMSPlugin defines exportedModuleBin task
* Redefine componentModulesPaths task
* interpreter-dsl is module
* Redefine componentModulesPaths task
* fmt sbt
* scala-libs-wrapper is a modular fat jar
* Add some module deps to org.enso.runtime
* engine-runner is not a fat jar
* Rename package in logging-config
* Rename package in logging-service
* Rename package in logging-service-logback
* Fix dependencies of exportedModuleBin task
* Mixed projects have own compileJava task
this task does not compile only module-info.java but all the java sources. So that we can see errors more easily.
When only module-info.java is compiled, the only errors that we can see are that we did not include some modules on module-path.
* Fix definition of exportedModule task.
* Remove usages of non-existing buildInfo and replace it with BuildVersion
* Fix some dependencies of org.enso.runtime module
* module-info compilation is handled directly by FrgaalCompiler
* module-info compilation is forced for projects that has only Scala sources with single module-info.java
* Fix compilation of org.enso.runtime
* manual module-info compilation is not a warning
* Rename packages in logging-utils-akka
* Create org.enso.language.server.deps.wrapper module
* language-server is module
* Creat akka-wrapper modular fat jar
* fmt
* Define common settings for modularFatJarWrapper
* Fix compilation of json-rpc-server
* Use akka and zio wrappers
* language-server depends on org.eclipse.jgit
* Fix some dependencies - update library manifests works now!
* update library manifests invokes runner directly
* buildEngineDistribution does not copy runner.jar
* Remove EngineRunnerBootLoader
* Fix compilation of std libs
* --patch-module and --add-exports are also passed to javac
* Rename package in runtime-integration-tests.
The package name org.enso.compiler clashes with the package from the module
* Remove usage of buildInfo
* FrgaalJavaCompiler can deal with non-existing module-info.java when shouldCompileModuleInfo is true.
It just generates a warning in such case as it suggests that there is something wrong with the project configuration.
* Revert AliasAnalysisTest.scala
* Fix dependencies and java cmdline options for runtime-integration-tests
* Rename test package
* runtime-integration-test depends on logging-service-logback/Test/compile
* Rename package in logging-service-logback/Test
* Fix FrgaalJavaCompiler creation for projects
* Sanitize Test/javaOptions arguments
* Sanitize Test/javaOptions arguments
* All the JPMSPlugin settings are scoped
* Remove unused sbt tasks
* modularFatJarWrapperSettings do not override javacOptions
* Resolve issue "Cannot find TestLoggerProvider" in runtime-integration-tests
* org.enso.runtime module is open
* Test that test classes are unconditionally opened and exported
* polyglot-api-macros is a module
* JPMSPlugin handles --add-opens cmdline option
* RuntimeServerTest ensures instruments are initialized
* Add some exports to org.enso.runtime.compiler
* Add instruments on module-path to runtime-integration-tests
* Replace TestLogProviderOnClassPath with TestLogProviderOnModulePath
* Replace buildInfo with BuildVersion
* Add jpms-wrapper-scalatest
* ReportLogsOnFailure is in non-modular testkit project
* Add necessary dependencies to testkit project
* Revert "Add jpms-wrapper-scalatest"
This reverts commit 732b3427a2.
* modularize filewatcher and wrap its dependencies
* Initial fix for language-server/test
* frgaal compiler setting are scoped for Compile and Test
* Rename package in language-server/test
* Exclude com.sun.jna from wrapper jars
* Rename package in library-manager-test
* testkit is an automatic module
* process-utils is module
* akka-wrapper contains akka-http
* Some fixes for library-manager-test
* Fix dependencies for akka-wrapper
* scala-libs-wrapper exports shapeless
* lang server deps wrapper exports pureconfig
* json-rpc-server requires org.slf4j
* Add some dependencies
* lang server deps wrapper exports pureconfig.generic
* language server test requires bouncycastle provider
* language server depends on cli
* directory-watcher wrapper requires org.slf4j
* WatcherAdapter logs unsuccessful initialization errors
* Fix error reporting in WatcherAdapter
* Fix rest of the language-server tests
* language-server-deps-wrapper depends on scala-libs-wrapper
* Fix rest of the language-server tests
* Missing module-info.class in an internal project is a warning, not an error
* Rename jpms-methvin-directory-watcher-wrapper to a simpler name
* compileOrder has to be specified before libraryDependencies
* exclude module-info.java from polyglot-api-macros
* Remove temporary logging in customFrgaalCompilerSettings
* Fix compilation of logging-service-logback
* Fix compilation of runtime-benchmarks
* Fix runtime-benchmarks/run
* HostClassLoader delegates to org.graalvm.polyglot class loader if org.enso.runtime is not on boot layer
* org.enso.runtime.lnaguage.epb module must be opened to allow it to be used by annnotation processor
* fmt
* Fix afetr merge
* Add module deps after merge
* Print stack trace of the uncaught exception from the annotation processor
* Remove akka-actor-typed from akka-wrapper
* runtime-instrument-common depends on slf4j
* Fix module-path for runtime-instrument-repl-debugger
* runtime-benchmarks depends on runtime-language-arrow
* --module-path is passed directly to frgaal
* Fix some module-related cmd line options for std-benchmarks
* Revert "--module-path is passed directly to frgaal"
This reverts commit da63f66a0e.
* Avoid closing of System.err when closing Context
* Avoid processing altogether when requested annotations are empty
* Pass shouldNotLimitModules opt to frgaal
* Pass module-path and add-modules options with -J prefix to frgaal
* BenchProcessor annotation processor creates its own truffle module layer
* bench-processor and benchmarks-common are modules
* fmt
* Fix after mege
* Enable JMH annotation processor
* Fix compileOrder in some projects
* Insert TruffleBoundary to QualifiedName.
This is a revert
* Fix building of engine-runner native image
* Add more deps to the native image
* Force module-info compilation in instruments.
This fixes some weird sbt bug
* Don't run engine-runner/assembly from Rust build script
* Update docs of JPMSPlugin
* fmt
* runtime-benchmarks depends on benchmarks-common module
* Fix benchmark report writing
* std-benchmarks annot processing does not take settings from runtime-benchmarks
* Suppress interpreter only warning in annotation processor
* Runtime version manager does not expect runtime.jar fat jar
* fmt
* Fix module entry point
* Move some polyglot tests to runtime-integration-tests.
Also make their output silent
* pkg has no dependency on org.graalvm.truffle
* Fix compiler dependencies test
* Rename all runtime.jar in fake releases
* Add language-server with dependencies to component dir
* No module-info.class in target dir is warning not error
* language-server does not depend on netbeans lookup uitl
* Declare LanguageServerApi service provider in module-info
* connected-lock-manager-server is JPMS module
* task-progress-notifications is module
* Add fansi-wrapper module
* Fix compilation of connected-lock-manager-server
* Define correct Test/internalModuleDependencies for project-manager
* fmt
* Fix LauncherRunnerSpec - no runtime.jar
* Add fansi-wrapper to runtime-integration-tests and runtime-benchmarks
* Fix engine-runner native image build
* Use newer JNA version - fixes running of hyperd
* DRY
* scala-compiler DRY
* fmt
* More build.sbt refactoring
* Include runtime-instrument-id-execution in engine-runner native image
* TruffleBoundary for QualifiedName.toString
* Finding a needle in a haystack
🤦
* More scala-library DRY
* more mixed-java/scala goodies
* Fix compilation of syntax-rust-definition
* Test that engine-runner does not depend on language-server
* Append rather than assign `moduleDependencies`
`++=` is less error prone than `:=`. Also discovered some unnecessary
dependencies.
* Replace : with File.pathSeparator
* [WIP] Make logging in ProjectService more verbose
* language-server/test didn't start because of missing lookup and fansi modules
* Formatting
* org.enso.cli.task.notifications needs Akka and Circe to link
* project-manager/test depends on buildEngineDistribution
* [WIP] Even more verbose logging for creating projects
* [WIP] Even more verbose logging for creating projects
* Revert "[WIP] Even more verbose logging for creating projects"
This reverts commit a7067c8472.
* Revert "[WIP] Even more verbose logging for creating projects"
This reverts commit fc6f53d4f1.
* Revert "[WIP] Make logging in ProjectService more verbose"
This reverts commit 427428e142.
* All the project with JPMSPlugin has stripped artifact names
* Revert all placeholder fake release components to runtime.jar without version
* Eliminate a cross version hack
We shouldn't be specifying Scala dependencies with a Scala cross version
in the suffix.
* Address SBT lint warnings
* Revert "Eliminate a cross version hack"
This reverts commit 8861dab288.
* logging-service-logback is mixedJavaScalaProject
* fmt
* Stripped artifact name contains classifier.
This fixes tests as those were named like `artifact-tests.jar`.
* Don't use LocalProject unless really needed
* Add more logging when BenchProcessor fails
* logging-service-logback is not mixed project
* Work with java.io.File.getPath to avoid mixing slash and backslash on Windows
* Reapply "Eliminate a cross version hack"
This reverts commit edaa436ee8.
* Pass scalaBinaryVersion correctly
* Remove scala-compiler from the distribution
* Fix IllegalAccessErrors from serde
* typos
* License review
* fmt
* Move testLogProviderOnModulePath to TestJPMSConfiguration
* logging-service-logback is not a mixed project
---------
Co-authored-by: Jaroslav Tulach <jaroslav.tulach@enso.org>
Co-authored-by: Hubert Plociniczak <hubert.plociniczak@gmail.com>
* More info when critical failure occurs
Log problematic module to help with debugging critical failure.
* One more exception
* s/System.err/Logger.error/
* maybe append slf4j deps
* fix what looks like a long standing typo
`GeneratedFormatTests.java` not `GeneratedFormatTests..java`
* one more typo
* Fix directory where to look for classpath
`./run java-gen test --skip-version-check` now works. At least locally.
* Local is fine, CI is not. More temporary debugging...
* Ensure project's managedClasspath is exported
Running java tests requires us knowing all additional dependencies as
they have to be added to the classpath manually. That can only be
ensured by invoking the right sbt target.
* Move sbt call after graalvm setup
* removing CI debugging
* Apply suggestions from code review
Co-authored-by: Kaz Wesley <kaz@lambdaverse.org>
---------
Co-authored-by: Kaz Wesley <kaz@lambdaverse.org>
- Fix debug logging for #11088 case--attempt to create an exception that is its own cause fails.
- In case the parser is used after closing, throw an `IllegalStateException` instead of UB. (This case is not known to occur and doesn't seem to be behind the #11121, but we should handle it more safely if it does.)
- Update all the templates to the newest versions.
- Fix any defects in the templates.
- Update the rust and scala code to package and download the templates.
- Update the front end to have images for every template (with some Gemini assists).
https://github.com/user-attachments/assets/59a1f845-f409-45bb-9c77-fe3a2d1262b1
* Rename packages in logging-utils-akka
* Migrate buildInfo to Java
* Rename packages in logging
* Rename package in scala-yaml
* No usage of CompilerDirectives inside pkg
* log errors of initialization of directory watcher
* HashCodeNode does not use com.google.common.base.Objects
* Rename rest of the packages
* fmt
* Fix dependencies on version-output
* Add necessary dependencies to testkit
* Rename instruments in runtime-fat-jar module-info
* Fix compilation errors because of BuildVersion
* Fix logger renames
* Use java.util.List directly
* Fixes after merge
* Improve error message in NativeLauncherSpec
* Fix logger renames
* Fix json version formatting
* Revert "No usage of CompilerDirectives inside pkg"
This reverts commit cc7e078416.
* fmt
- Linting updates.
- Add an `Examples.welcome` and adjust the start up project to use it.
- Merge all of Cass's work into the source code.
- Make example render in mono space font.
* Reduce akka logs in PM and LS
After #10905 we suddenly got a lot of (useless) logs from akka in
project-manager and language-server. After some investigation it turned
out that akka-typed had a special configuration to enable logging in
akka using slf4j.
As we don't need the whole library for that I only stole the
configuration.
* nit
* licensing
* missing license files
* Akka-related startup improvements
Realized that Akka Typed and Spray were not used **at all** yet there
were in the list of dependencies.
Additionally, the former would also show up in the list of Akka's
library-extensions, initialized on startup.
* Hardcode list of library extensions
Hardcoding a list of library extensions is not recommended but I don't
see any other way of disabling expensive Serialization extension, which
we don't seem to use anyway.
* fmt
* licensing update
* Ensure the annotation processor error message is not lost
* Dont limit ContextBuilder in BenchProcessor to enso language
* Add libraryDependencies on GraalVM.toolsPkgs to std-benchmarks
* Add some dependencies to std-benchmarks - fixes compilation
* Revert std-benchmarks project settings from #10836.
runtime-fat-jar has to be as Jar on module-path, not exploded.
* fmt
Removed all `#![feature]` flags, except for `#![feature(test)]`. Once parser benchmarks are ported to something that is compatible with stable rust, we will be able to switch to it.
Fixes#9749 by:
- [x] Adding `fn` option to `enso-debug-server` instrument - eb3b76e
- [x] Print warnings (if any) to stderr - 4fda04b
- [x] Improving output of `:list` to print out warnings - dbe3c45480
- [x] Print errors to stderr - 1312546
- [x] Exiting on `DataflowError` - 2cc7ef5 and e6fbf73
- [x] Using all of that inside of `runner/*Main` - 7df58ef
The core of the change is in instrumentation that wraps the `main` method and at its end checks for _warnings or errors_ among local variables. When an error is found, it wraps the original return value of `main` with a proxy that delegates to the original value, but also pretends to be _exit exception_ with exit code 173. That one is detected in `Main` launcher to exit the process with exit code 173.
# Important Notes
As a side-effect of this change, one can request an invocation of REPL at the end of any method just by providing a property to the VM:
```bash
$ enso --vm.D=polyglot.enso-debug-server.method-break-point=err_test.main --run err_test.enso --repl
```
stops at the end of `main` method of `err_test.enso` file.
# Important Notes
The command to run the gui dev environment has been changed. Invoking the old command will print a message about that.
From now on, use `pnpm dev:gui2` in repository root.
Majority of warnings handling is now done via newly introduced nodes. Moreover, the underlying representation of warnings storage in `WithWarnings` was changed from `Warning[]` to `EnsoHashMap`.
# Important Notes
- Remove `ArrayRope`.
* Debug Ydoc without making code changes
Previously the log statements were guarded by a constant. Now log
statements are printed if YDOC_DEBUG=true env var is set during launch.
* debug LS RPCs
* bump vite to 5.3.5
* s/YDOC_DEBUG/YDOC_LS_DEBUG
* Address PR comment
* nit
* nit
* fix tests
* yet another linting problem
Implement full `ArgumentDefinition` syntax for new-lambda arguments, e.g `\a=1 (b:Integer = 23)-> a + b`; add backend support for new lambdas.
Emit an error when any syntactic operator is used outside of its associated syntax (fixes#10473).
Phase out complex arguments for old-lambdas: It is now a syntax error to specify default arguments for an old-lambda. This capability had no usage in real code; affected tests have been updated to test new lambdas. For now, old lambdas can continue to be used with simple arguments; if default arguments are desired, a new-style lambda can be used.
