source: tests/poly-many-arsz.cfa@ 4be0117

//
// Cforall Version 1.0.0 Copyright (C) 2023 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// poly-many-arsz.cfa -- using many built-in array types with concrete sizes
//
// Author           : Mike Brooks
// Created On       : Tue Aug 13 12:00:00 2024
// Last Modified By :
// Last Modified On :
// Update Count     :
//

// This behaviour was once broken, as trac #175.

forall( T1*, T2* )
struct mypair {
    T1 first;
    T2 second;
};

void baseline( void ) {
    printf("baseline\n");

    // no declaration of x
    // facts that are true of y:

    mypair(char[2], char) y @= {};
    printf("|y| = %zd\n", sizeof(y));    // 3

    y.second = 0;
    printf("y.second = %d\n", y.second); // 0

    y.first[1] = 17;
    printf("y.second = %d\n", y.second); // 0
}

void withInterference( void ) {
    printf("with interference\n");

    // adding this declaration of x ...
    mypair(char[1], char) x @= {};
    printf("|x| = %zd\n", sizeof(x));    // 2

    // ... even if it isn't really used ...
    (void)x;

    // ... must not affect the observed facts of y:

    mypair(char[2], char) y @= {};
    printf("|y| = %zd\n", sizeof(y));    // 3

    y.second = 0;
    printf("y.second = %d\n", y.second); // 0

    y.first[1] = 17;
    printf("y.second = %d\n", y.second); // 0
}

int main() {
    baseline();
    withInterference();
    return 0;
}