main.check.scalac

JAVA 语言的函数式编程扩展

scalac error: bad option: '-dd'
  scalac -help  gives more information
Usage: scalac <options | source files>
where possible options include: 
  -doc                            Generate documentation
  -g:<g>                          Generate debugging info (none,source,line,vars,notc)
  -nowarn                         Generate no warnings
  -noassert                       Generate no assertions and assumptions
  -verbose                        Output messages about what the compiler is doing
  -classpath <path>               Specify where to find user class files
  -sourcepath <path>              Specify where to find input source files
  -bootclasspath <path>           Override location of bootstrap class files
  -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
  -windowtitle <windowtitle>      Specify window title of generated HTML documentation
  -documenttitle <documenttitle>  Specify document title of generated HTML documentation
  -target:<target>                Specify which backend to use (jvm-1.5,jvm-1.4,msil,cldc)
  -migrate                        Assist in migrating from Scala version 1.0
  -o <file>                       Name of the output assembly (only relevant with -target:msil)
  -r <path>                       List of assemblies referenced by the program (only relevant with -target:msil)
  -debug                          Output debugging messages
  -deprecation                    enable detailed deprecation warnings
  -unchecked                      enable detailed unchecked warnings
  -statistics                     Print compiler statistics
  -explaintypes                   Explain type errors in more detail
  -resident                       Compiler stays resident, files to compile are read from standard input
  -uniqid                         Print identifiers with unique names (debugging option)
  -printtypes                     Print tree types (debugging option)
  -prompt                         Display a prompt after each error (debugging option)
  -noimports                      Compile without any implicit imports
  -nopredefs                      Compile without any implicit predefined values
  -skip:<phase>                   Skip <phase>
  -check:<phase>                  Check the tree at start of <phase>
  -print:<phase>                  Print out program after <phase>
  -printer:<printer>              Printer to use (text,html)
  -printfile <file>               Specify file in which to print trees
  -graph:<phase>                  Graph the program after <phase>
  -browse:<phase>                 Browse the abstract syntax tree after <phase>
  -stop:<phase>                   Stop after phase <phase>
  -log:<phase>                    Log operations in <phase>
  -logall                         Log all operations
  -version                        Print product version and exit
  -help                           Print a synopsis of standard options
  -nouescape                      disables handling of \u unicode escapes
  -Xinline                        Perform inlining when possible
  -XO                             Optimize. implies -Xinline, -Xcloselim and -Xdce
  -Xcloselim                      Perform closure elimination
  -Xdce                           Perform dead code elimination
  -Xwarndeadcode                  Emit warnings for dead code
  -XbytecodeRead                  Enable bytecode reader.
  -Xdetach                        Perform detaching of remote closures
  -Xshowcls <class>               Show class info
  -Xshowobj <object>              Show object info
  -Xlinearizer:<Xlinearizer>      Linearizer to use (normal,dfs,rpo,dump)
  -Xgenerics                      Use generic Java types
  -Xprintpos                      Print tree positions (as offsets)
  -Xscript                        compile script file
  -Xexperimental                  enable experimental extensions
  -Xplugtypes                     parse but ignore annotations in more locations
  -Xkilloption                    optimizes option types

one error found