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// RUN: %dafny "%s" > "%t"
// RUN: %diff "%s.expect" "%t"
class C {
static function method Static() : bool
{
true
}
}
method K() {
var f := C.Static;
var o : object;
assert o !in f.reads();
assert f.requires();
assert f();
}
class T {
var h : int -> int;
}
function B(t : T) : int -> int
requires t != null;
reads t;
{
t.h
}
function J(t : T) : int
requires t != null
reads t
reads t.h.reads(0)
{
if t.h.requires(0) then
B(t)(0)
else
B(t)(0) // error: precondition violation
}
method U(t : T)
requires t != null;
modifies t;
{
t.h := x => x;
assert J(t) == 0; // ok
}
class MyClass {
var data: int
function method F(): int
reads this
{
data
}
method M(that: MyClass)
requires that != null
{
var fn := that.F; // "that" is captured into the closure
var d := fn();
assert d == that.data; // yes
assert d == this.data; // error: no reason to believe that this would hold
}
}
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