scalac(1)							   USER COMMANDS							 scalac(1)

NAME

       scalac - Compiler for the Scala 2 language

SYNOPSIS

       scalac  [ <options> ] <source files>

PARAMETERS

       <options>
	      Command line options. See OPTIONS below.

       <source files>
	      One or more source files to be compiled (such as MyClass.scala).

OPTIONS

       The  compiler  has  a  set  of  standard  options that are supported on the current development environment and will be supported in future
       releases. An additional set of non-standard options are specific to the current virtual machine implementation and are subject to change in
       the future.  Non-standard options begin with -X.

   Standard Options
       -g:{none,source,line,vars,notc}
	      "none" generates no debugging info,

	      "source" generates only the source file attribute,

	      "line" generates source and line number information,

	      "vars" generates source, line number and local variable information,

	      "notc" generates all of the above and will not perform tail call optimization.

       -nowarn
	      Generate no warnings

       -verbose
	      Output messages about what the compiler is doing

       -deprecation
	      Indicate whether source should be compiled with deprecation information; defaults to off (accepted values are: on, off, yes and no)

	      Available since Scala version 2.2.1

       -unchecked
	      Enable detailed unchecked warnings

	      Non variable type-arguments in type patterns are unchecked since they are eliminated by erasure

	      Available since Scala version 2.3.0

       -classpath <path>
	      Specify  where  to  find	user class files (on Unix-based systems a colon-separated list of paths, on Windows-based systems, a semi-
	      colon-separate list of paths). This does not override the built-in ("boot") search path.

	      The default class path is the current directory. Setting the CLASSPATH variable or using the -classpath  command-line  option  over-
	      rides that default, so if you want to include the current directory in the search path, you must include "." in the new settings.

       -sourcepath <path>
	      Specify where to find input source files.

       -bootclasspath <path>
	      Override location of bootstrap class files (where to find the standard built-in classes, such as "scala.List").

       -extdirs <dirs>
	      Override location of installed extensions.

       -d <directory>
	      Specify where to place generated class files.

       -encoding <encoding>
	      Specify character encoding used by source files.

	      The  default  value  is  platform-specific (Linux: "UTF8", Windows: "Cp1252"). Executing the following code in the Scala interpreter
	      will return the default value on your system:

		  scala> new java.io.InputStreamReader(System.in).getEncoding

       -target: <target>
	      Specify which backend to use (jvm-1.5,msil).

	      The default value is "jvm-1.5" (was "jvm-1.4" up to Scala version 2.6.1).

       -print Print program with all Scala-specific features removed

       -optimise
	      Generates faster bytecode by applying optimisations to the program

       -explaintypes
	      Explain type errors in more detail.

       -uniqid
	      Print identifiers with unique names (debugging option).

       -version
	      Print product version and exit.

       -help  Print a synopsis of standard options.

   Advanced Options
       -Xassem <file>
	      Name of the output assembly (only relevant with -target:msil)

       -Xassem-path <path>
	      List of assemblies referenced by the program (only relevant with -target:msil)

       -Xcheck-null
	      Emit warning on selection of nullable reference

       -Xdisable-assertions
	      Generate no assertions and assumptions

       -Xexperimental
	      enable experimental extensions

       -Xno-uescape
	      Disable handling of u unicode escapes

       -Xplug-types
	      Parse but ignore annotations in more locations

       -Xplugin: <file>
	      Load a plugin from a file

       -Xplugin-disable: <plugin>
	      Disable a plugin

       -Xplugin-list
	      Print a synopsis of loaded plugins

       -Xplugin-opt: <plugin:opt>
	      Pass an option to a plugin

       -Xplugin-require: <plugin>
	      Abort unless a plugin is available

       -Xprint: <phases>
	      Print out program after <phases> (see below).

       -Xprint-pos
	      Print tree positions (as offsets)

       -Xprint-types
	      Print tree types (debugging option).

       -Xprompt
	      Display a prompt after each error (debugging option).

       -Xresident
	      Compiler stays resident, files to compile are read from standard input.

       -Xshow-class <class>
	      Show class info.

       -Xshow-object <object>
	      Show object info.

       -Xshow-phases
	      Print a synopsis of compiler phases.

       -Xsource-reader <classname>
	      Specify a custom method for reading source files.

       -Xscript <object>
	      Compile as a script, wrapping the code into object.main().

   Compilation Phases
       initial
	      initializing compiler

       parse  parse source files

       namer  create symbols

       analyze
	      name and type analysis

       refcheck
	      reference checking

       uncurry
	      uncurry function types and applications

       lambdalift
	      lambda lifter

       typesasvalues
	      represent types as values

       addaccessors
	      add accessors for constructor arguments

       explicitouterclasses
	      make links from inner classes to enclosing one explicit

       addconstructors
	      add explicit constructor for each class

       tailcall
	      add tail-calls

       wholeprog
	      perform whole program analysis

       addinterfaces
	      add one interface per class

       expandmixins
	      expand mixins by code copying

       boxing makes boxing explicit

       erasure
	      type eraser

       icode  generate icode

       codegen
	      enable code generation

       terminal
	      compilation terminated

       all    matches all phases

ENVIRONMENT

       JAVACMD
	      Specify the java command to be used for running the Scala code.  Arguments may be specified as part  of  the  environment  variable;
	      spaces, quotation marks, etc., will be passed directly to the shell for expansion.

       JAVA_HOME
	      Specify JDK/JRE home directory. This directory is used to locate the java command unless JAVACMD variable set.

       JAVA_OPTS
	      Specify the options to be passed to the java command defined by JAVACMD.

	      With Java 1.5 (or newer) one may for example configure the memory usage of the JVM as follows: JAVA_OPTS="-Xmx512M -Xms16M -Xss16M"

	      With GNU Java one may configure the memory usage of the GIJ as follows: JAVA_OPTS="--mx512m --ms16m"

EXAMPLES

       Compile a Scala program to the current directory
	      scalac HelloWorld

       Compile a Scala program to the destination directory classes
	      scalac -d classes HelloWorld.scala

       Compile a Scala program using a user-defined java command
	      env JAVACMD=/usr/local/bin/cacao scalac -d classes HelloWorld.scala

       Compile all Scala files found in the source directory src to the destination directory classes
	      scalac -d classes src/*.scala

EXIT STATUS

       scalac returns a zero exist status if it succeeds to compile the specified input files. Non zero is returned in case of failure.

AUTHOR

       Written by Martin Odersky and other members of the Scala team.

REPORTING BUGS

       Report bugs to http://lampsvn.epfl.ch/trac/scala.

COPYRIGHT

       This  is open-source software, available to you under a BSD-like license. See accomponying "copyright" or "LICENSE" file for copying condi-
       tions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO

       fsc(1), sbaz(1), scala(1), scaladoc(1), scalap(1)

version 0.4							  April 18, 2007							 scalac(1)