Q:

What is the order of the scala compiler phases?

I want to sharpen my picture of the phases of scala compilation. I know that certain things have to happen in the compiler, but don't really know the order in which they happen and how the order should affect my programming.
Am I right in saying that the following things are the full list of what the compiler does?

parse program
types checked
do erasure
implicit conversion
byte-code generated
optimize

If so, what is the order that it does these phases?
How does this order affect the programmer, especially the type-level programmer?

A:

You see the phases, their order and explanation by using scalac -Xshow-phases.
In 2.11, use -Xshow-phases -Ydebug to show both enabled and disabled phases.
Here is how it's for 2.10.0:
 » scalac -Xshow-phases

             phase name  id  description
             ----------  --  -----------
                 parser   1  parse source into ASTs, perform simple desugaring
                  namer   2  resolve names, attach symbols to named trees
         packageobjects   3  load package objects
                  typer   4  the meat and potatoes: type the trees
                 patmat   5  translate match expressions
         superaccessors   6  add super accessors in traits and nested classes
             extmethods   7  add extension methods for inline classes
                pickler   8  serialize symbol tables
              refchecks   9  reference/override checking, translate nested objects
           selectiveanf  10  
           selectivecps  11  
                uncurry  12  uncurry, translate function values to anonymous classes
              tailcalls  13  replace tail calls by jumps
             specialize  14  @specialized-driven class and method specialization
          explicitouter  15  this refs to outer pointers, translate patterns
                erasure  16  erase types, add interfaces for traits
            posterasure  17  clean up erased inline classes
               lazyvals  18  allocate bitmaps, translate lazy vals into lazified defs
             lambdalift  19  move nested functions to top level
           constructors  20  move field definitions into constructors
                flatten  21  eliminate inner classes
                  mixin  22  mixin composition
                cleanup  23  platform-specific cleanups, generate reflective calls
                  icode  24  generate portable intermediate code
                inliner  25  optimization: do inlining
inlineExceptionHandlers  26  optimization: inline exception handlers
               closelim  27  optimization: eliminate uncalled closures
                    dce  28  optimization: eliminate dead code
                    jvm  29  generate JVM bytecode
               terminal  30  The last phase in the compiler chain

A:

Have you looked here? That page points to http://www.scala-lang.org/sites/default/files/sids/nielsen/Thu,%202009-05-28,%2008:13/compiler-phases-sid.pdf (PDF), which describes the compiler phases for Scala 2.8.

