    project
        : requirements <include>/home/ghost/Work/boost <threading>multi
        ;
    project a : : debug ;

    exe hello : hello.cpp ;

    exe hello
        : hello.cpp
        : <include>boost <threading>multi
        ;
    exe app : app.cpp ../util/foo//bar ;
    exe important : main.cpp helpers/<link>static ;

    exe b : [ glob *.cpp ] ;

    lib tools :
        [ glob *.cpp ] ;

    lib tools : [ glob *.cpp : file_to_exclude.cpp bad*.cpp ] ;

    lib network : network.cpp
        : <conditional>@my-rule
        ;

    DEPENDS foo.o : foo.c ;

    using msvc : : "Z:/Programs/Microsoft Visual Studio/vc98/bin/cl" ;
    using msvc : : echo Compiling && foo/bar/baz/cl ;
    using gcc : 5 : : <cxxflags>"-std=c++14 -O2" ;
    using clang : 3.9 : : <cxxflags>-std=c++14 <cxxflags>-O2 ;
    exe test3 : test3.cpp : -<threading>multi ;
    XYZ += <cxxflags>-Wzero-as-null-pointer-constant&&-Wno-zero-as-null-pointer-constant ;
    exe hello : hello.cpp : <os>NT,<toolset>gcc:<link>static ;

    install dist : hello helpers :
        <variant>release:<location>dist/release
        <variant>debug:<location>dist/debug ;
    install dist2 : hello helpers : <location>$(DIST) ;

    exe app : app.cpp : [ check-target-builds has_foo "System has foo" : <library>foo : <define>FOO_MISSING=1 ] ;

    import path : * ;

    using python
    : 2.7 # version
    : # Interpreter/path to dir
    : /usr/include/python2.7 # includes
    : /usr/lib/x86_64-linux-gnu # libs
    : # conditions
    ;

    xx ;
    xx ;; ;
    xx ;a ;
    xx a; ;
    xx ;a; ;

    ## comment title
    # BUG
    # TODO
    # aTODOa

    #| multi
    line
    comment
    TODO
    bla bla
    |#

    if cond {
        statements ;
    }
    else {
        statements ;
    }

    for var in list {
        statements ;
    }

    while cond {
        statements ;
    }

    switch value
    {
        case pattern1 : statements ;
        case pattern2 : statements ;
        other ;
    }

    if xxinxx {
    }

    ifxxx s ;

    rule a? ( x )
    {
      echo $(x) ;
    }
    a? 23 ;

    local rule test ( a )
    {
    }

    rule example
     (
         parameter1 :
         parameter2 ? :
         parameter3 + :
         parameter4 *
     )
     {
       if <variant>debug in $(properties)
       {
           OPTIONS on $(targets) = --debug ;
       }
     }

    rule my-rule ( properties * )
    {
        local result ;
        if <toolset>gcc <optimization>speed in $(properties)
        {
            result += <define>USE_INLINE_ASSEMBLER ;
            return $(result) ;
        }

        local m = [ CALLER_MODULE ] ;
        local result ;
        for v in $(values)
        {
            if [ modules.call-in $(m) : $(f) $(v) ]
            {
                result += $(v) ;
            }
        }
        return result ;
        return <name>$(name) ;
        return [ virtual-target.register $(t) ] ;
        return [ sequence.transform virtual-target.register : $(targets) ] ;
    }

    rule run ( project name ? : property-set : sources * )
    {
        if [ $(s).type ] = PY
        {
            python = $(s) ;
        }

        local new-sources ;
        for local s in $(sources)
        {
            if [ type.is-derived [ $(s).type ] CPP ]
            {
                local name = [ $(s).name ] ;    # get the target's basename
                if $(name) = [ $(python).name ]
                {
                    name = $(name)_ext ;        # rename the target
                }
                new-sources += [ generators.construct $(project) $(name) :
                  PYTHON_EXTENSION : $(property-set) : $(s) $(libs) ] ;
            }
        }

        result = [ construct-result $(python) $(new-sources) : $(project) $(name)
                     : $(property-set) ] ;
    }

    rule link
    {
        DEPENDS $(<) : [ on $(<) return $(DEF_FILE) ] ;
    }

    actions link bind DEF_FILE
    {
        $(.LD) .... /DEF:$(DEF_FILE) ....
    }

    actions create-file-from-another
    {
        create-file-from-another $(OPTIONS) $(<) $(>)
    }

    mypackage =
      [ pkg-config.import mypackage : usage-requirements <conditional>@define_ns
      ] ;

    me = [ modules.binding $(__name__) ] ;

    local ZLIB_INCLUDE = [ modules.peek : ZLIB_INCLUDE ] ;

    local t = [ new file-target $(name) : CPP : $(project) : $(a) ] ;

    $(var) field1 : field2 : ... : fieldN ;
    $(var)o aaaa ;

    on target $(var) field1 : field2 : ... : fieldN ;

    [ $(var) field1 : field2 : ... : fieldN ]
    [ on target $(var) field1 : field2 : ... : fieldN ]

    local key = "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\App Paths" ;
    local values = [ W32_GETREGNAMES "$(key)\\$(subkey)" : values ] ;

    variable = $(b) $(c) ;
    variable += elements ;
    variable on targets = elements ;
    variable on targets += "elements" ;
    variable default = elements ;
    variable ?= elements ;

    defs += <define>NAME='\"$(VALUE)\"' ;

    x = $($(Z)) ;
    x = $(Z)x ;
    x = x$(Z) ;
    x = x$(Z)x ;

    x = "C:\\Program Files\\Borland" ; ECHO $(x:T) ;

    module my_module # my module
    {
        rule salute ( x ) { ECHO $(x), world ; }
        rule greet ( ) { salute hello ; }
        greet ; # ok
    }

    class verbatim-scanner : common-scanner
    {
        rule pattern ( )
        {
            return "//###include[ ]*\"([^\"]*)\"" ;
        }
        greet ; # error
    }

    # test crazy (and valid) name
    a<b> a<b> [ a<b> a<b> a] ] ;
    rule a<b>() () { }
    actions a<b> { }
    local a<x> ;
    local a<x> = a<b> ;