racket/collects/tests/honu/ideas.honu
Matthew Flatt d191d764be extra notes on examples
svn: r5617
2007-02-15 08:18:18 +00:00

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#honu
/* Some examples to consider when writing a test suite.
//T means the example should be a type error.
//R means the example should be a run-time error. */
-10;
(int)10;
//T (int)"apple";
//R (int)(obj)"apple";
//T 1(10);
//T int xyz = "a";
//R int xyz = (obj)"a";
int b(int y) { 1 + y; }
int f(int x, (string -> int) g) {
if (x == 0) 1; else g("a");
}
int g(string s) { return 5; }
//T g({ if (true) "a"; else 5; });
string j (string s) { return s; }
obj h = j;
f(1, g);
f(1, { obj g2 = g; g2; });
f(0, h);
string function(string x) { return x; };
/* Should be the same speed as the Scheme version: */
int loop(int n) {
if (n == 0)
return 1;
else
return loop(n - 1);
}
{ time loop(1000000); } + 1;
obj z(a) {
int y = 12;
return 13;
}
z(10);
if (true)
if (true)
1;
else
2;
else
3;
1 < 2 && 7 > 6;
<a, b, c> b poly(a n) { if (n) poly<bool, b, c>(false); else { obj x = 12; x;} }
poly<int, int, int> (1);
<a, b, c> obj paly(obj n, obj m) { return n; }
obj pf0((a b c >-> (a -> b)) g) { return g<int,bool,int>(10); }
//R pf0(poly);
obj pf((a b c >-> (a -> b)) g) { return g<int,int,int>(10); }
pf(poly);
//T pf(paly);
pf({ obj x = poly; x; } );
pf((obj)poly);
//R pf({ obj x = paly; x; } );
//R pf((obj)paly);
/* Check time of 2-arg loop... */
obj loop3(int n, obj res) {
if (n == 0)
return res;
else
return loop3(n - 1, res);
}
time loop3(1000000, false);
/* Compare this cost to loop3: */
<a> a loop2(int n, a res) {
if (n == 0)
return res;
else
return loop2<a>(n - 1, res);
}
time loop2<bool>(1000000, false);
int app((int int -> int) f) { return f(0, 1); }
app(int function(int a, int b) { return a; });
//T { if (true) int function(int b) { return 1; }; else 10; } (1);
{ if (true) int function(int b) { return 1; }; else { obj x = 10; x; } } (1);
(true ? int function(int b) { return 1; } : { obj x = 10; x; } ) (1);
{ if (true) int function(int b) { return 1; }; else obj function(int x) { return "hi"; }; } (1);
//T { if (true) int function(int b, obj z) { return 1; }; else obj function(int x) { return "hi"; }; } (1);
{ if (false) int function(int b) { return 1; }; else obj function(int x) { return "hi"; }; } (1);
{ if (false) int function(int b) { return 1; }; else obj function(obj x) { return "hi"; }; } ("a");
//R { if (true) int function(int b) { return 1; }; else obj function(obj x) { return "hi"; }; } ("a");
{ if (true) obj function(obj x) { return "hi"; }; else int function(int b) { return 1; };} ("a");
//R { if (false) obj function(obj x) { return "hi"; }; else int function(int b) { return 1; };} ("a");
int make_adder((int -> int) x) { x(10); }
{ ((int -> int) -> int) mkaddr = make_adder; mkaddr; }(b);
{ if (true) { ((int -> int) -> int) mkaddr = make_adder; mkaddr; } else { obj x = 5; x; } }(b);
<a> function(a y) { return 10; };
(<a> function(a y) { return 10; });
//T (<a> function(a y) { return 10; })(12);
(<a> function(a y) { return 10; })<int>(12);
(int function(int b, int a) { return a + b; }) (1, 2);
provide make_adder;