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// RUN: %dafny /compile:0 /print:"%t.print" /dprint:"%t.dprint" "%s" > "%t"
// RUN: %diff "%s.expect" "%t"
class C {
var x: int
var y: int
ghost var z: int
function F(): int
reads `x
{
x
}
function G(): int
reads `x
{
F()
}
function H(): int
reads this
{
F()
}
function I(n: nat): int
reads this
{
x + y + z + J(n)
}
function J(n: nat): int
reads `x, this`z
decreases {this}, n, 0
{
if n == 0 then 5 else
I(n-1) // error: insufficient reads clause
}
function K(n: nat): int
reads `x
decreases {this}, n+1
{
L(n)
}
function L(n: nat): int
reads `x
{
if n < 2 then 5 else K(n-2)
}
method M()
modifies `x
{
N();
}
method N()
modifies `x
{
x := x + 1;
}
method O(n: nat)
modifies this
{
P(n);
}
method P(n: nat)
modifies `x
decreases n, 0
{
x := x + 1;
if n != 0 {
O(n-1); // error: insufficient modifies clause to make call
}
}
}
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