79 lines
1.8 KiB
Plaintext
79 lines
1.8 KiB
Plaintext
/* 1 */ struct A { mut: v int }
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/* 2 */ struct B { a A }
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/* 3 */ struct C { mut: b B }
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/* 4 */ struct D { mut: c C }
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/* 5 */ struct E { mut: v []int }
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/* 6 */ struct F { e []E }
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/* 7 */ mut s := 'hello world'
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/*( 8)*/ s.len = 0 // Error (field len immutable)
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/* 8 */ mut b := B{}
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/*( 9)*/ b.a.v = 1 // Error (field a immutable)
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/*( 9)*/ b.a = A{} // Error (field a immutable)
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/* 9 */ b = B{A{2}} // Correct
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/* 10 */ mut c := C{}
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/* 11 */ c.b = B{} // Correct
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/*(12)*/ c.b.a = A{} // Error (field a immutable)
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/*(12)*/ c.b.a.v = 1 // Error (field a immutable)
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/* 12 */ c2 := C{}
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/*(13)*/ c2.b = B{} // Error (c2 immutable)
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/* 13 */ mut d := D{}
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/* 14 */ d.c.b = B{} // Correct
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/* 15 */ mut f := F{}
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/*(16)*/ f.e << E{} // Error (field e immutable)
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/*(16)*/ f.e[0].v << 1 // Error (field e immutable)
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/* 16 */ e := E{}
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/*(17)*/ e.v << 1 // Error (e immutable)
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===output===
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.vrepl_temp.v:8:14: cannot modify immutable field `len` (type `string`)
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declare the field with `mut:`
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struct string {
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mut:
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len int
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}
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.vrepl_temp.v:9:14: cannot modify immutable field `a` (type `B`)
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declare the field with `mut:`
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struct B {
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mut:
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a A
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}
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.vrepl_temp.v:9:12: cannot modify immutable field `a` (type `B`)
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declare the field with `mut:`
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struct B {
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mut:
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a A
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}
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.vrepl_temp.v:12:14: cannot modify immutable field `a` (type `B`)
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declare the field with `mut:`
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struct B {
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mut:
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a A
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}
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.vrepl_temp.v:12:16: cannot modify immutable field `a` (type `B`)
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declare the field with `mut:`
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struct B {
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mut:
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a A
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}
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.vrepl_temp.v:13:15: `c2` is immutable
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.vrepl_temp.v:16:12: cannot modify immutable field `e` (type `F`)
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declare the field with `mut:`
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struct F {
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mut:
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e []E
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}
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.vrepl_temp.v:16:17: cannot modify immutable field `e` (type `F`)
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declare the field with `mut:`
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struct F {
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mut:
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e []E
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}
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.vrepl_temp.v:17:17: `e` is immutable (can't <<)
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