44 lines
992 B
V
44 lines
992 B
V
import math.complex
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struct Cat {
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name string
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breed string
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age int
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}
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type Feline = Cat
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fn test_offsetof() {
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cat := Cat{
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name: 'Cthulhu'
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breed: 'Great Old One'
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age: 2147483647
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}
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unsafe {
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assert *(&string(&u8(&cat) + __offsetof(Cat, name))) == 'Cthulhu'
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assert *(&string(&u8(&cat) + __offsetof(Cat, breed))) == 'Great Old One'
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assert *(&int(&u8(&cat) + __offsetof(Cat, age))) == 2147483647
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}
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}
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fn test_offsetof_struct_from_another_module() {
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num := complex.Complex{1.0, 1.0}
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unsafe {
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assert *(&f64(&u8(&num) + __offsetof(complex.Complex, re))) == 1.0
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assert *(&f64(&u8(&num) + __offsetof(complex.Complex, im))) == 1.0
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}
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}
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fn test_offsetof_alias() {
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fel := Feline{
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name: 'Cthulhu'
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breed: 'Great Old One'
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age: 2147483647
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}
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unsafe {
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assert *(&string(&u8(&fel) + __offsetof(Feline, name))) == 'Cthulhu'
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assert *(&string(&u8(&fel) + __offsetof(Feline, breed))) == 'Great Old One'
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assert *(&int(&u8(&fel) + __offsetof(Feline, age))) == 2147483647
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}
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}
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