generic-tuple-style-enum.rs

// Require a gdb or lldb that can read DW_TAG_variant_part.
//@ min-gdb-version: 8.2
//@ needs-rust-lldb

//@ compile-flags:-g

// === GDB TESTS ===================================================================================

// gdb-command:set print union on
// gdb-command:run

// gdb-command:print case1
// gdbr-check:$1 = generic_tuple_style_enum::Regular<u16, u32, u64>::Case1(0, 31868, 31868, 31868, 31868)

// gdb-command:print case2
// gdbr-check:$2 = generic_tuple_style_enum::Regular<i16, i32, i64>::Case2(0, 286331153, 286331153)

// gdb-command:print case3
// gdbr-check:$3 = generic_tuple_style_enum::Regular<i16, i32, i64>::Case3(0, 6438275382588823897)

// gdb-command:print univariant
// gdbr-check:$4 = generic_tuple_style_enum::Univariant<i64>::TheOnlyCase(-1)


// === LLDB TESTS ==================================================================================

// lldb-command:run

// lldb-command:v case1
// lldbr-check:(generic_tuple_style_enum::Regular<u16, u32, u64>::Case1) case1 = { __0 = 0 __1 = 31868 __2 = 31868 __3 = 31868 __4 = 31868 }

// lldb-command:v case2
// lldbr-check:(generic_tuple_style_enum::Regular<i16, i32, i64>::Case2) case2 = Regular<i16, i32, i64>::Case2 { Case1: 0, Case2: 286331153, Case3: 286331153 }

// lldb-command:v case3
// lldbr-check:(generic_tuple_style_enum::Regular<i16, i32, i64>::Case3) case3 = Regular<i16, i32, i64>::Case3 { Case1: 0, Case2: 6438275382588823897 }

// lldb-command:v univariant
// lldbr-check:(generic_tuple_style_enum::Univariant<i64>) univariant = Univariant<i64> { TheOnlyCase: Univariant<i64>::TheOnlyCase(-1) }

#![feature(omit_gdb_pretty_printer_section)]
#![omit_gdb_pretty_printer_section]

use self::Regular::{Case1, Case2, Case3};
use self::Univariant::TheOnlyCase;

// NOTE: This is a copy of the non-generic test case. The `Txx` type parameters have to be
// substituted with something of size `xx` bits and the same alignment as an integer type of the
// same size.

// The first element is to ensure proper alignment, irrespective of the machines word size. Since
// the size of the discriminant value is machine dependent, this has be taken into account when
// datatype layout should be predictable as in this case.
enum Regular<T16, T32, T64> {
    Case1(T64, T16, T16, T16, T16),
    Case2(T64, T32, T32),
    Case3(T64, T64)
}

enum Univariant<T64> {
    TheOnlyCase(T64)
}

fn main() {

    // In order to avoid endianness trouble all of the following test values consist of a single
    // repeated byte. This way each interpretation of the union should look the same, no matter if
    // this is a big or little endian machine.

    // 0b0111110001111100011111000111110001111100011111000111110001111100 = 8970181431921507452
    // 0b01111100011111000111110001111100 = 2088533116
    // 0b0111110001111100 = 31868
    // 0b01111100 = 124
    let case1: Regular<u16, u32, u64> = Case1(0_u64, 31868_u16, 31868_u16, 31868_u16, 31868_u16);

    // 0b0001000100010001000100010001000100010001000100010001000100010001 = 1229782938247303441
    // 0b00010001000100010001000100010001 = 286331153
    // 0b0001000100010001 = 4369
    // 0b00010001 = 17
    let case2: Regular<i16, i32, i64> = Case2(0_i64, 286331153_i32, 286331153_i32);

    // 0b0101100101011001010110010101100101011001010110010101100101011001 = 6438275382588823897
    // 0b01011001010110010101100101011001 = 1499027801
    // 0b0101100101011001 = 22873
    // 0b01011001 = 89
    let case3: Regular<i16, i32, i64> = Case3(0_i64, 6438275382588823897_i64);

    let univariant = TheOnlyCase(-1_i64);

    zzz(); // #break
}

fn zzz() { () }