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test_union.cpp

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#include <vector>

#include <set>

#include <map>

#include <assert.h>

#include <math.h>

#include <string.h>

#include <stdio.h>

#include <stdlib.h>

#include <time.h>

#include <emscripten.h>

union TestBase {

char c;

int i;

float f;

};

// Keep in mind that it is undefined behavior to read from the non active member of a union in C++

// Don't add tests that assign to 1 member but check another

void test_1() {

TestBase tb;

tb.c = 11;

EM_ASM_INT({

var decoded = Module['cyberdwarf'].decode_from_stack($0, "tb", 100)["union TestBase"];

test_assert("char == 11", decoded["char : c"] == 11);

}, &tb);

tb.i = 1337;

EM_ASM_INT({

var decoded = Module['cyberdwarf'].decode_from_stack($0, "tb", 100)["union TestBase"];

test_assert("int == 1337", decoded["int : i"] == 1337);

}, &tb);

tb.f = 10000;

EM_ASM_INT({

var decoded = Module['cyberdwarf'].decode_from_stack($0, "tb", 100)["union TestBase"];

test_assert("float == 10000", decoded["float : f"] == 10000);

}, &tb);

}

int main(int argc, char *argv[]) {

EM_ASM(init_cd_test("test_union"));

test_1();

}