source: doc/theses/jiada_liang_MMath/test1.cfa@ fbb5bdd

#include <fstream.hfa>                                                                  // sout
#include <stdlib.hfa>                                                                   // ato
#include <enum.hfa>

// integral
enum Letter {
        A = 'A', B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z,
        a = 'a', b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z
};
enum( Letter ) Greek { Alph = A, Beta = B, Gamma = G, /* more enums */ Zeta = Z }; // alphabet intersection

// integral
enum( char ) Currency { Dollar = '$', Cent = '¢', Yen = '¥', Pound = '£', Euro = 'E' }; // iso-latin-1
enum( Currency ) Europe { Euro = Currency.Euro, Pound = Currency.Pound };

enum( signed char ) srgb { Red = -1, Green = 0, Blue = 1 };
enum( long long int ) BigNum { X = 123_456_789_012_345,  Y = 345_012_789_456_123 };
// non-integral
enum( double ) Math { PI_2 = 1.570796, PI = 3.141597, E = 2.718282 };
enum( _Complex ) Plane { X = 1.5+3.4i, Y = 7+3i, Z = 0+0.5i };
// pointer
enum( const char * ) Name { Fred = "FRED", Mary = "MARY", Jane = "JANE" };
int i, j, k;
enum( int * ) ptr { I = &i,  J = &j,  K = &k };
//enum( int & ) ref { I = i,   J = j,   K = k };
// tuple
//enum( [int, int] ) { T = [ 1, 2 ] };
// function
void f() {}   void g() {}
enum( void (*)() ) funs { F = f,  G = g };
// aggregate
struct Person { char * name; int age, height; };
enum( Person ) friends { Liz = { "ELIZABETH", 22, 170 }, //Beth = Liz,
                                                 Jon = { "Jonathan", 35, 190 } };

enum() Mode { O_RDONLY, O_WRONLY, O_CREAT, O_TRUNC, O_APPEND };
Mode mode = O_RDONLY;
void opaque() {
bool b = mode == O_RDONLY || mode < O_APPEND;   // disallowed
//int www = mode;       // disallowed
}

enum( char * ) Colour { Red = "red", Green = "green", Blue = "blue"  };

enum E1 { A1, B1, C1 = A1, D1 = B1 };
enum(float) E2 { A2 = 3.5, B2 = 4.5, C2 = A, D2 = B };

void fred() {
Letter letter = A;
Greek greek = Beta;
letter = Beta;                                                  // allowed, letter == B
//greek = A;                                                            // disallowed

        for ( Greek l = Alph; posn(l) < posn(Gamma); l = succ( l ) ) {
                printf( "%s %c %d\n", label( l ), value( l ), posn( l ) );
        }
        for ( Currency c = Dollar; posn(c) < posn(Currency.Euro); c = succ( c ) ) {
                printf( "%s %c %d\n", label( c ), value( c ), posn( c ) );
        }
}

enum( const char * ) Names { Fred = "FRED", Mary = "MARY", Jane = "JANE" };
enum( const char * ) Names2 { inline Names, Jack = "JACK", Jill = "JILL" };
enum( const char * ) Names3 { inline Names2, Sue = "SUE", Tom = "TOM" };
void bar() {
        Names fred = Names.Fred;
        (Names2)fred;  (Names3)fred;  (Names3)Names2.Jack;  // cast to super type
        Names2 fred2 = fred;  Names3 fred3 = fred2; // assign to super type
        const char * name = fred;
        Names name = Fred;
        sout | name | label( name ) | posn( name ) | value( name );
}
void f( Names n ) { sout | "Name" | posn( n ); }
void g( Names2 );
void h( Names3 );
void j( char * );

enum CColour { Red, Blue, Green };
CColour c0 = 0;
CColour c1 = 1;
CColour c = 2;
int w = Red;

void coo() {
        enum(int) Color { Red, Blue, Green };
        Colour c = Red;
        sout | countof( Colour ) | Countof( c );
//      sout | Countof( Colour );
        sout | countof( c );
}

// enum(int) Week ! { Mon, Tue, Wed, Thu = 10, Fri, Sat, Sun };
// enum(int) RGB ! { Red, Green, Blue };

// void foo() {
//      with ( Week, RGB ) {
//              weekday = Sun;
//              rgb = Green;
//      }
// }

void baz() {
        enum(int) Count { First, Second, Third/* = First*/, Fourth/* = Second*/ };
        enum CCount { First, Second, Third/* = First*/, Fourth/* = Second*/ };
        Count cnt = Second;
        CCount ccnt = Second;
        if ( cnt < Third ) sout | "less than Third";
        if ( cnt ) sout | "XXX";
        if ( ccnt ) sout | "YYY";
        enum(float) F {WWW = 0.0};
        F f;
        if ( f ) sout | "FFF";
        bool ?!=?( Name n, zero_t ) { sout | "DDD";  return n != Fred; }
        Name n = Mary;
        if ( n ) sout | "NAME";
        choose( cnt ) {
                case First: sout | "First";
                case Second: sout | "Second";
                case Third: sout | "Third";
                case Fourth: sout | "Fourth";
        }
//      for (d; Week) { sout | d; }
//      for (p; +~=Planet) { sout | p; }
        for ( cx; Count ) { sout | cx | nonl; } sout | nl;
        for ( cx; +~= Count ) { sout | cx | nonl; } sout | nl;
        for ( cx; -~= Count ) { sout | cx | nonl; } sout | nl;
        for ( Count cx = lowerBound();; ) {
                sout | cx | nonl;
          if ( cx == upperBound() ) break;
                cx = succ( cx );
        }
        sout | nl;
}

int main() {
        fred();
        Names name = Names.Fred;
//      f( name );

        int jane_pos = posn( Names.Jane );
        const char * jane_value = value( Names.Jane );
        const char * jane_label = label( Names.Jane );
        sout | Names.Jane | posn( Names.Jane) | label( Names.Jane ) | value( Names.Jane );

        bar();
        baz();
        coo();

        enum Ex { Ax, Bx, Cx, Nx };
        float H1[Nx] = { [Ax] : 3.4, [Bx] : 7.1, [Cx] : 0.01 }; // C
//      float H2[Ex] = { [Ax] : 3.4, [Bx] : 7.1, [Cx] : 0.01 }; // CFA

        enum(int) E { A = 3 } e = A;
        sout | A | label( A ) | posn( A ) | value( A );
        sout | e | label( e ) | posn( e ) | value( e );
}