Artifact b35cfd66e862f7bf189142d9927955d8905ac7b1

• File sample/type.pmy
  • 2010-11-21 16:05:20 - part of checkin [da7559b744] on branch trunk - fizzbuzz sample changed (user: kinaba) [annotate]

     1  @@type = fun(x){
     2    if( _isint(x) ) { "int" }
     3    else { if( _isstr(x) ) { "str" }
     4    else { if( _isundefined(x) ) { "undefined" }
     5    else { "any" }}}
     6  };
     7  
     8  def binop(a,b,c) {
     9    fun(x,y){@value(
    10      if( @type(x)=="undefined" || @type(y)=="undefined" ) { "undefined" } else {
    11        if( @type(x)==a && @type(y)==b ) { c } else { "error" }
    12      }
    13    )}
    14  };
    15  
    16  @type "+" = binop("int", "int", "int");
    17  @type "-" = binop("int", "int", "int");
    18  @type "<" = binop("int", "int", "int");
    19  @type ">" = binop("int", "int", "int");
    20  
    21  def mergeType(a,b) {
    22    if( a == "undefined" ) { if(b=="undefined"){"error"}else{b} } else { a }
    23  };
    24  
    25  @type "if" = fun(c,t,e) {@value(
    26   if(@type(c)=="int" ) { mergeType(@type(t()), @type(e())) } else { "error" }
    27  )};