source: tests/collections/vector-demo.cfa@ 124400b

#include <containers/vector2.hfa>

void raiiTests() {
    printf("raiiTests=================\n");

    vector( float ) v = { 25 };

    push_last( v, 1 );
    printf( "Having pushed, length is %ld\n", v`length );

    float y = v[0]`val;
    printf( "by transit, got pos0 = %f\n", y );

    {
        vector_exit(float) it = v[0];

        float z = it`val;
        printf( "by exit, got pos0 = %f\n", z );

        // forbid modification while locked
      #ifdef TRY_MOD_WHILE_LOCKED_1
        push_last( v, 1 );   // runtime assertion failure
        printf( "Having pushed, length is %ld\n", v`length );
      #endif
    }

    push_last( v, 2 );
    printf( "Having pushed, length is %ld\n", v`length );

    // deletion scope for some exits
    // point is the function decls and calls, though
    {
        void helperE(vector_exit(float) it) {
            float q = it`val;
            printf( "helperE sees %f\n", q );
        }

        vector_exit(float) it2 = v[1];
        helperE(it2);

        // can't call with implied exit (wish I could, low priority)
      #ifdef TRY_IMPLIED_EXIT_1
        helperE( v[1] ); // Invalid application of existing declaration(s)
      #endif

        //------

        vector_exit(float) producerE( vector( float ) & theVec ) {
          return theVec[0];
        }

        vector_exit(float) it3 = producerE( v );
        float z = it3`val;
        printf( "producerE gave %f\n", z );

        float zzzz = producerE( v )`val;
        printf( "producerE again gave %f\n", zzzz );

        //------

        void helperT(vector_transit(float) it) {
            float q = it`val;
            printf( "helperT sees %f\n", q );
        }

        helperT( v[1] );

        //------

        vector_transit(float) producerT( vector( float ) & theVec ) {
            return theVec[0];
        }

        float zz = producerT( v )`val;
        printf( "producerT gave %f\n", zz );
    }

    //=======

    {
        vector_permit(float) it = v[0];

        float z = it`val;
        printf( "by permit, got pos0 = %f\n", z );

        // allow modification while permits exist
        push_last( v, 1 );
        printf( "Having pushed, length is %ld\n", v`length );

        // forbid passing permit by value
      #ifdef TRY_PASS_PERMIT_BYVAL_1
        void f( vector_permit(float) xx ) {
            printf("can't get here\n");
        }
        f( it ); // Unique best alternative includes deleted identifier
      #endif

        // can declare function that returns permit (wish to forbid)
        vector_permit(float) g( vector( float ) & theVec ) {
            return theVec[0]; // want to forbid
        }

        // forbid calling a function that returns permit by value
      #ifdef TRY_RETURN_PERMIT_BYVAL_1
        vector_permit(float) ofG = g( v ); // Unique best alternative includes deleted identifier
      #endif
        
        // allow declaration of permit, populating from exit
        vector_exit(float) h( vector( float ) & theVec ) {
            return theVec[0];
        }

        vector_permit(float) ofH = h( v );
        float zh = ofH`val;
        printf( "into permit from call, got ofH = %f\n", zh );
    }
}

void stayValidTests() {
    printf("stayValidTests============\n");
    vector( float ) v = { 4 };
    push_last(v, 0.0f);
    push_last(v, 0.1f);
    push_last(v, 0.2f);
    // v is [0.0, 0.1, 0.2]

    vector_permit(float) iter = v[1];  // iter at 0.1

    float val1 = iter`val;
    printf("before %f\n", val1);

    insert_before( v, 1, 98.6f );  // v is [0.0, 98.6, 0.1, 0.2]; iter at 0.1

    float val2 = iter`val;
    printf("after, logical: %f\n", val2);

    // we had filled it to the brim
    assert( v`capacity == 4 && v`length == 4 );

    push_last(v, -100); // v is [0.0, 98.6, 0.1, 0.2, 0.3]; iter at 0.1, but RTP it's not looking at the old memory's 0.1

    // that made it bigger
    assert( v`capacity >  5 && v`length == 5 );

    v[2] = -0.1;  // v is [0.0, 98.6, -0.1, 0.2, 0.3]; iter at -0.1, where only the new memory had that change

    float val3 = iter`val;
    printf("after, physical: %f\n", val3);
}

void loopTests() {
    printf("loopTests=================\n");
    vector(float) v = { 4 };
    push_last(v, 0.0f);
    push_last(v, 0.1f);
    push_last(v, 0.2f);
    float toPrint;

    while( vector_exit(float) it = v`origin; it`moveNext ) {
        toPrint *= it;
        printf("loop sees %f\n", toPrint);
    }
}

int main() {
    raiiTests();
    stayValidTests();
    loopTests();
}