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Merge pull request #2727 from som-snytt/issue/2615-options
Update some compiler options
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‎_overviews/scala3-migration/options-intro.md‎

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@@ -16,6 +16,6 @@ To do so you can refer to the [Lookup Table](options-lookup.html).
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> Passing an unavailable option to the Scala 3 compiler does not make it fail.
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> It just prints a warning and ignores the option.
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You can also discover the new Scala 3 compiler options, that have no equivalent in Scala 2.13, in the [New Compiler Options](options-new.html) page.
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You can also discover the new Scala 3 compiler options, which have no equivalent in Scala 2.13, in the [New Compiler Options](options-new.html) page.
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For scaladoc settings reference and their compatibility with Scala2 scaladoc, read [Scaladoc settings compatibility between Scala2 and Scala3](scaladoc-settings-compatibility.html) page.
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For Scaladoc settings reference and their compatibility with Scala2 Scaladoc, read [Scaladoc settings compatibility between Scala2 and Scala3](scaladoc-settings-compatibility.html) page.

‎_overviews/scala3-migration/options-lookup.md‎

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@@ -7,26 +7,39 @@ previous-page: options-intro
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next-page: options-new
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---
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The compiler options are classified and ordered according to their Scala 2.13 name.
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Each Scala 2.13 option is associated with its status in Scala 3.
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This table lists the Scala 2.13 compiler options with their equivalent in Scala 3.
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Some options have cross-version support, such as `-Vprint`.
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Others have a close equivalent with a different name. A number of Scala 2 options
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have no equivalent in Scala 3, such as options for debugging Scala 2 macros.
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The compiler options are shown as displayed by the help output `scalac -help`, `scalac -X`, etc.
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A few aliases are shown here, but most older aliases, such as `-Xprint` for `-Vprint`,
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or `-Ytyper-debug` for `-Vtyper`, are listed by the latest name.
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The option groups `-V` and `-W` were introduced in Scala 2.13, for "verbose" options that
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request additional diagnostic output and "warnings" that request additional checks which
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may or may not indicate errors in code. `-Werror` elevates warnings to errors, and `-Wconf`
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allows precise control over warnings by either ignoring them or taking them as errors.
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The configuration string for `-Wconf` will likely require adjustment when migrating to Scala 3,
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since the configuration syntax and the error messages it matches are different.
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| Status | Meaning |
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|-|-|
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| <i class="fa fa-check fa-lg"></i> | it is available in Scala 3 |
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| `<new-name>` | It has been renamed to `<new-name>` |
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| <i class="fa fa-times fa-lg"></i> | It is not available in 3.0.0 but it could be added later |
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| <i class="fa fa-check fa-lg"></i> | It is available in Scala 3. |
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| `<new-name>` | It has been renamed to `<new-name>`. |
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| <i class="fa fa-times fa-lg"></i> | It is not yet available but could be added later. |
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> The current comparison is based on Scala 2.13.4 and 3.0.0-M3.
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> The current comparison is based on Scala 2.13.10 and 3.3.0.
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## Standard Settings
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| 2.13.x | 3.0.x |
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| 2.13.x | 3.3.x |
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|-|-|
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| `-Dproperty=value` | <i class="fa fa-times fa-lg"></i> |
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| `-J<flag>` | <i class="fa fa-times fa-lg"></i> |
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| `-Dproperty=value` | <i class="fa fa-check fa-lg"></i> |
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| `-J<flag>` | <i class="fa fa-check fa-lg"></i> |
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| `-P:<plugin>:<opt>` |<i class="fa fa-check fa-lg"></i>|
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| `-V` | <i class="fa fa-times fa-lg"></i> |
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| `-W` | <i class="fa fa-times fa-lg"></i> |
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| `-V` | <i class="fa fa-check fa-lg"></i> |
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| `-W` | <i class="fa fa-check fa-lg"></i> |
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| `-X` |<i class="fa fa-check fa-lg"></i>|
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| `-Y` |<i class="fa fa-check fa-lg"></i>|
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| `-bootclasspath` |<i class="fa fa-check fa-lg"></i>|
@@ -63,11 +76,74 @@ Each Scala 2.13 option is associated with its status in Scala 3.
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| `-verbose` |<i class="fa fa-check fa-lg"></i>|
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| `-version` |<i class="fa fa-check fa-lg"></i>|
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## Verbose Settings
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| 2.13.x | 3.3.x |
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|-|-|
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| `-Vbrowse:<phases>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vclasspath` | `-Ylog-classpath` |
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| `-Vdebug` | `-Ydebug` |
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| `-Vdebug-tasty` | <i class="fa fa-times fa-lg"></i> |
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| `-Vdebug-type-error` | <i class="fa fa-times fa-lg"></i> |
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| `-Vdoc` | <i class="fa fa-times fa-lg"></i> |
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| `-Vfree-terms` | <i class="fa fa-times fa-lg"></i> |
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| `-Vfree-types` | <i class="fa fa-times fa-lg"></i> |
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| `-Vhot-statistics`| <i class="fa fa-times fa-lg"></i> |
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| `-Vide`| <i class="fa fa-times fa-lg"></i> |
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| `-Vimplicit-conversions`| <i class="fa fa-times fa-lg"></i> |
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| `-Vimplicits`| <i class="fa fa-times fa-lg"></i> |
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| `-Vimplicits-max-refined`| <i class="fa fa-times fa-lg"></i> |
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| `-Vimplicits-verbose-tree`| <i class="fa fa-times fa-lg"></i> |
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| `-Vinline <package/Class.method>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vlog:<phases>` | `-Ylog:<phases>`|
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| `-Vmacro` | <i class="fa fa-times fa-lg"></i> |
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| `-Vmacro-lite` | <i class="fa fa-times fa-lg"></i> |
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| `-Vopt <package/Class.method>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vpatmat` | <i class="fa fa-times fa-lg"></i> |
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| `-Vphases` | <i class="fa fa-check fa-lg"></i> |
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| `-Vpos`| <i class="fa fa-times fa-lg"></i> |
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| `-Vprint:<phases>` | <i class="fa fa-check fa-lg"></i> |
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| `-Vprint-args <file>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vprint-pos` | `-Yprint-pos` |
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| `-Vprint-types` | `-Xprint-types` |
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| `-Vquasiquote` | <i class="fa fa-times fa-lg"></i> |
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| `-Vreflective-calls` | <i class="fa fa-times fa-lg"></i> |
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| `-Vreify` | <i class="fa fa-times fa-lg"></i> |
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| `-Vshow:<phases>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vshow-class <class>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vshow-member-pos <output style>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vshow-object <object>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vshow-symkinds` | <i class="fa fa-times fa-lg"></i> |
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| `-Vshow-symowners` | <i class="fa fa-times fa-lg"></i> |
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| `-Vstatistics <phases>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vsymbols` | <i class="fa fa-times fa-lg"></i> |
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| `-Vtype-diffs` | <i class="fa fa-times fa-lg"></i> |
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| `-Vtyper` | <i class="fa fa-times fa-lg"></i> |
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## Warning Settings
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| 2.13.x | 3.3.x |
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|-|-|
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| `-Wconf` | <i class="fa fa-check fa-lg"></i> |
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| `-Wdead-code` | <i class="fa fa-times fa-lg"></i> |
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| `-Werror` | <i class="fa fa-check fa-lg"></i> |
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| `-Wextra-implicit` | <i class="fa fa-times fa-lg"></i> |
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| `-Wmacros:<mode>` | <i class="fa fa-times fa-lg"></i> |
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| `-Wnonunit-if` | <i class="fa fa-times fa-lg"></i> |
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| `-Wnonunit-statement` | <i class="fa fa-check fa-lg"></i> |
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| `-Wnumeric-widen` | <i class="fa fa-times fa-lg"></i> |
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| `-Woctal-literal` | <i class="fa fa-times fa-lg"></i> |
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| `-Wopt` | <i class="fa fa-times fa-lg"></i> |
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| `-Wperformance` | <i class="fa fa-times fa-lg"></i> |
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| `-Wself-implicit` | <i class="fa fa-times fa-lg"></i> |
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| `-Wunused:<warnings>` | <i class="fa fa-check fa-lg"></i> |
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| `-Wvalue-discard`| <i class="fa fa-check fa-lg"></i> |
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## Advanced Settings
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| 2.13.x | 3.0.x |
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| 2.13.x | 3.3.x |
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|-|-|
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| `-X` |<i class="fa fa-check fa-lg"></i>|
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| `-Xasync` | <i class="fa fa-times fa-lg"></i> |
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| `-Xcheckinit` | `-Ycheck-init` |
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| `-Xdev` | <i class="fa fa-times fa-lg"></i> |
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| `-Xdisable-assertions` | <i class="fa fa-times fa-lg"></i> |
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| `-Xjline` | <i class="fa fa-times fa-lg"></i> |
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| `-Xlint:deprecation` | `-deprecation` |
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| `-Xlint:<warnings>` | <i class="fa fa-times fa-lg"></i> |
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| `-Xlog-implicit-conversion` | <i class="fa fa-times fa-lg"></i> |
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| `-Xlog-implicits` | <i class="fa fa-times fa-lg"></i> |
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| `-Xlog-reflective-calls` | <i class="fa fa-times fa-lg"></i> |
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| `-Xmacro-settings` | <i class="fa fa-times fa-lg"></i> |
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| `-Xmain-class` | <i class="fa fa-times fa-lg"></i> |
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| `-Xmaxerrs` | <i class="fa fa-times fa-lg"></i> |
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| `-Xmaxwarns` | <i class="fa fa-times fa-lg"></i> |
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| `-Xmigration` |<i class="fa fa-check fa-lg"></i>|
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| `-Xmixin-force-forwarders` |<i class="fa fa-check fa-lg"></i>|
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| `-Xmigration` |<i class="fa fa-check fa-lg"></i>|
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| `-Xmixin-force-forwarders` |<i class="fa fa-check fa-lg"></i>|
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| `-Xno-forwarders` |<i class="fa fa-check fa-lg"></i>|
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| `-Xno-patmat-analysis` | <i class="fa fa-times fa-lg"></i> |
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| `-Xnon-strict-patmat-analysis` | <i class="fa fa-times fa-lg"></i> |
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| `-Xnojline` | <i class="fa fa-times fa-lg"></i> |
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| `-Xplugin` |<i class="fa fa-check fa-lg"></i>|
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| `-Xplugin-disable` |<i class="fa fa-check fa-lg"></i>|
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| `-Xplugin-list` |<i class="fa fa-check fa-lg"></i>|
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| `-Xplugin-require` |<i class="fa fa-check fa-lg"></i>|
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| `-Xplugin` |<i class="fa fa-check fa-lg"></i>|
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| `-Xplugin-disable` |<i class="fa fa-check fa-lg"></i>|
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| `-Xplugin-list` |<i class="fa fa-check fa-lg"></i>|
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| `-Xplugin-require` |<i class="fa fa-check fa-lg"></i>|
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| `-Xpluginsdir` |<i class="fa fa-check fa-lg"></i>|
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| `-Xprint-args` | <i class="fa fa-times fa-lg"></i> |
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| `-Xprompt` |<i class="fa fa-check fa-lg"></i>|
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| `-Xreporter` | <i class="fa fa-times fa-lg"></i> |
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| `-Xresident` | <i class="fa fa-times fa-lg"></i> |
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| `-Xscript` | <i class="fa fa-times fa-lg"></i> |
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| `-Xshow-class <class>` | <i class="fa fa-times fa-lg"></i> |
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| `-Xshow-object <object>` | <i class="fa fa-times fa-lg"></i> |
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| `-Xsource` | `-source` |
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| `-Xsource-reader` | <i class="fa fa-times fa-lg"></i> |
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| `-Xverify` | `-Xverify-signatures` |
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| `-Ydelambdafy` | <i class="fa fa-times fa-lg"></i> |
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| `-Ydump-classes` |<i class="fa fa-check fa-lg"></i>|
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| `-Ygen-asmp` | <i class="fa fa-times fa-lg"></i> |
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| `-Yhot-statistics` | <i class="fa fa-times fa-lg"></i> |
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| `-Yide-debug` | <i class="fa fa-times fa-lg"></i> |
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| `-Yimports` | <i class="fa fa-times fa-lg"></i> |
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| `-Yissue-debug` | <i class="fa fa-times fa-lg"></i> |
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| `-Yjar-compression-level` | <i class="fa fa-times fa-lg"></i> |
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| `-YjarFactory` | <i class="fa fa-times fa-lg"></i> |
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| `-Ymacro-debug-lite` | <i class="fa fa-times fa-lg"></i> |
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| `-Ymacro-debug-verbose` | <i class="fa fa-times fa-lg"></i> |
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| `-Ymacro-annotations` | <i class="fa fa-times fa-lg"></i> |
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| `-Ymacro-classpath` | <i class="fa fa-times fa-lg"></i> |
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| `-Ymacro-expand` | <i class="fa fa-times fa-lg"></i> |
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| `-Yno-imports` |<i class="fa fa-check fa-lg"></i>|
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| `-Yno-predef` |<i class="fa fa-check fa-lg"></i>|
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| `-Yopt-inline-heuristics` | <i class="fa fa-times fa-lg"></i> |
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| `-Yopt-log-inline <package/Class.method>` | <i class="fa fa-times fa-lg"></i> |
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| `-Yopt-trace <package/Class.method>` | <i class="fa fa-times fa-lg"></i> |
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| `-Ypatmat-debug` | <i class="fa fa-times fa-lg"></i> |
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| `-Ypatmat-exhaust-depth` | <i class="fa fa-times fa-lg"></i> |
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| `-Ypos-debug` | <i class="fa fa-times fa-lg"></i> |
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| `-Ypresentation-any-thread` | <i class="fa fa-times fa-lg"></i> |
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| `-Ypresentation-debug` | <i class="fa fa-times fa-lg"></i> |
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| `-Ypresentation-delay` | <i class="fa fa-times fa-lg"></i> |
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| `-Ypresentation-locate-source-file` | <i class="fa fa-times fa-lg"></i> |
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| `-Ypresentation-log` | <i class="fa fa-times fa-lg"></i> |
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| `-Ypresentation-replay` | <i class="fa fa-times fa-lg"></i> |
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| `-Ypresentation-strict` | <i class="fa fa-times fa-lg"></i> |
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| `-Ypresentation-verbose` | <i class="fa fa-times fa-lg"></i> |
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| `-Yprint-trees` | <i class="fa fa-times fa-lg"></i> |
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| `-Yprofile-destination` |<i class="fa fa-check fa-lg"></i>|
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| `-Yprofile-destination` |<i class="fa fa-check fa-lg"></i>|
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| `-Yprofile-enabled` |<i class="fa fa-check fa-lg"></i>|
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| `-Yprofile-external-tool` |<i class="fa fa-check fa-lg"></i>|
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| `-Yprofile-run-gc` |<i class="fa fa-check fa-lg"></i>|
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| `-Yprofile-trace` | <i class="fa fa-times fa-lg"></i> |
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| `-Yquasiquote-debug` | <i class="fa fa-times fa-lg"></i> |
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| `-Yrangepos` | <i class="fa fa-times fa-lg"></i> |
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| `-Yrecursion` | <i class="fa fa-times fa-lg"></i> |
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| `-Yreify-copypaste` | <i class="fa fa-times fa-lg"></i> |
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| `-Yreify-debug` | <i class="fa fa-times fa-lg"></i> |
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| `-Yrepl-class-based` | <i class="fa fa-times fa-lg"></i> |
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| `-Yrepl-outdir` | <i class="fa fa-times fa-lg"></i> |
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| `-Yrepl-use-magic-imports` | <i class="fa fa-times fa-lg"></i> |
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| `-Yresolve-term-conflict` |<i class="fa fa-check fa-lg"></i>|
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| `-Yscala3-implicit-resolution` | <i class="fa fa-times fa-lg"></i> |
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| `-Yscriptrunner` | <i class="fa fa-times fa-lg"></i> |
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| `-Yskip` |<i class="fa fa-check fa-lg"></i>|
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| `-Yshow:<phases>` | <i class="fa fa-times fa-lg"></i> |
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| `-Yshow-member-pos <output style>` | <i class="fa fa-times fa-lg"></i> |
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| `-Yshow-symkinds` | <i class="fa fa-times fa-lg"></i> |
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| `-Yshow-symowners` | <i class="fa fa-times fa-lg"></i> |
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| `-Yshow-syms` | <i class="fa fa-times fa-lg"></i> |
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| `-Ystatistics <phases>` | <i class="fa fa-times fa-lg"></i> |
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| `-Ystop-after` |<i class="fa fa-check fa-lg"></i>|
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| `-Ystop-before` |<i class="fa fa-check fa-lg"></i>|
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| `-Ytyper-debug` | <i class="fa fa-times fa-lg"></i> |
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| `-Yskip` |<i class="fa fa-check fa-lg"></i>|
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| `-Ystop-after` |<i class="fa fa-check fa-lg"></i>|
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| `-Ystop-before` |<i class="fa fa-check fa-lg"></i>|
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| `-Ytasty-no-annotations` | <i class="fa fa-times fa-lg"></i> |
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| `-Ytasty-reader` | <i class="fa fa-times fa-lg"></i> |
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| `-Ytrack-dependencies` | <i class="fa fa-times fa-lg"></i> |
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| `-Yvalidate-pos` | <i class="fa fa-times fa-lg"></i> |
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| `-Ywarn-dead-code` | <i class="fa fa-times fa-lg"></i> |
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| `-Ywarn-numeric-widen` | <i class="fa fa-times fa-lg"></i> |
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| `-Ywarn-unused:<warnings>` | <i class="fa fa-times fa-lg"></i> |
182-
| `-Ywarn-value-discard` | <i class="fa fa-times fa-lg"></i> |
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## Verbose Settings
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Verbose settings were introduced in 2.13.
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Most of them are not yet implemented in Scala 3.
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| 2.13.x | 3.0.x |
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|-|-|
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| `-Vbrowse:<phases>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vdebug-tasty` | <i class="fa fa-times fa-lg"></i> |
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| `-Vdoc` | <i class="fa fa-times fa-lg"></i> |
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| `-Vfree-terms` | <i class="fa fa-times fa-lg"></i> |
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| `-Vfree-types` | <i class="fa fa-times fa-lg"></i> |
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| `-Vhot-statistics`| <i class="fa fa-times fa-lg"></i> |
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| `-Vide`| <i class="fa fa-times fa-lg"></i> |
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| `-Vimplicit-conversions`| <i class="fa fa-times fa-lg"></i> |
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| `-Vimplicits`| <i class="fa fa-times fa-lg"></i> |
200-
| `-Vinline <package/Class.method>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vissue`| <i class="fa fa-times fa-lg"></i> |
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| `-Vmacro` | <i class="fa fa-times fa-lg"></i> |
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| `-Vmacro-lite` | <i class="fa fa-times fa-lg"></i> |
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| `-Vopt <package/Class.method>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vpatmat` | <i class="fa fa-times fa-lg"></i> |
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| `-Vpos`| <i class="fa fa-times fa-lg"></i> |
207-
| `-Vprint:<phases>` | `-Xprint:<phases>` |
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| `-Vphases` | `-Xshow-phases` |
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| `-Vclasspath` | `-Ylog-classpath` |
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| `-Vlog:<phases>` | `-Ylog:<phases>`|
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| `-Vdebug` | `-Ydebug` |
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| `-Vprint-args <file>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vprint-pos` | `-Yprint-pos` |
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| `-Vprint-types` | `-Xprint-types` |
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| `-Vquasiquote` | <i class="fa fa-times fa-lg"></i> |
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| `-Vreflective-calls` | <i class="fa fa-times fa-lg"></i> |
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| `-Vreify` | <i class="fa fa-times fa-lg"></i> |
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| `-Vshow:<phases>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vshow-class <class>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vshow-member-pos <output style>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vshow-object <object>` | <i class="fa fa-times fa-lg"></i> |
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| `-Vshow-symkinds` | <i class="fa fa-times fa-lg"></i> |
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| `-Vshow-symowners` | <i class="fa fa-times fa-lg"></i> |
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| `-Vstatistics <phases>` | <i class="fa fa-times fa-lg"></i> |
225-
| `-Vsymbols` | <i class="fa fa-times fa-lg"></i> |
226-
| `-Vtyper` | <i class="fa fa-times fa-lg"></i> |
227-
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## Warning Settings
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Warning settings were introduced in 2.13.
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Most of them are not yet implemented in Scala 3.
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| 2.13.x | 3.0.x |
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|-|-|
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| `-Wconf` | <i class="fa fa-times fa-lg"></i> |
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| `-Wdead-code` | <i class="fa fa-times fa-lg"></i> |
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| `-Werror` | `-Xfatal-warnings` |
238-
| `-Wextra-implicit` | <i class="fa fa-times fa-lg"></i> |
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| `-Wmacros:<mode>` | <i class="fa fa-times fa-lg"></i> |
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| `-Wnumeric-widen` | <i class="fa fa-times fa-lg"></i> |
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| `-Woctal-literal` | <i class="fa fa-times fa-lg"></i> |
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| `-Wunused:<warnings>` | <i class="fa fa-times fa-lg"></i> |
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| `-Wvalue-discard`| <i class="fa fa-times fa-lg"></i> |
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| `-Wself-implicit` | <i class="fa fa-times fa-lg"></i> |
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## Compiler Plugins
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