bearophile wrote:
I have tried the following code:
import std.c.stdio: printf;
import std.conv: to;
nothrow pure int double_sqr(int x) { // line 4
int y, z;
nothrow void do_sqr() { y *= y; }
y = x;
do_sqr();
z += y;
y = x;
do_sqr();
z += y;
return z;
}
void main(string[] args) {
int x = args.length == 2 ? to!(int)(args[1]) : 10;
int y = double_sqr(x) + double_sqr(x);
printf("4 * x * x = %d\n", y);
}
The compiler spits the following error:
pure_impure_test.d(4): Error: function pure_impure_test.double_sqr 'double_sqr'
is nothrow yet may throw
but I don't understand why. What are the things inside it that can throw an
exception?
Bye,
bearophile
Obviously my 2808 patch only solved one part of the problem.
It compiles if you change do_sqr to
void do_sqr() nothrow { y *= y; }
Please add a bug report to Bugzilla.
