Info Catalog asymptote: Self & prefix operators asymptote: Operators

asymptote: User-defined operators

 
 6.9.3 User-defined operators
 ----------------------------
 
 The following symbols may be used with 'operator' to define or redefine
 operators on structures and built-in types:
 - + * / % ^ ! < > == != <= >= & | ^^ .. :: -- --- ++
 << >> $ $$ @ @@
 The operators on the second line have precedence one higher than the
 boolean operators '<', '>', '<=', and '>='.
 
    Guide operators like '..' may be overloaded, say, to write a user
 function that produces a new guide from a given guide:
 guide dots(... guide[] g)=operator ..;
 
 guide operator ..(... guide[] g) {
   guide G;
   if(g.length > 0) {
     write(g[0]);
     G=g[0];
   }
   for(int i=1; i < g.length; ++i) {
     write(g[i]);
     write();
     G=dots(G,g[i]);
   }
   return G;
 }
 
 guide g=(0,0){up}..{SW}(100,100){NE}..{curl 3}(50,50)..(10,10);
 write("g=",g);
 

Info Catalog asymptote: Self & prefix operators asymptote: Operators