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https://github.com/golang/go
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57668b84ff
Simplify the implementation of interface conversions in the compiler. Don't pass fields that aren't needed (the data word, usually) to the runtime. For generics, we need to put a dynamic type in an interface. The new dataWord function is exactly what we need (the type word will come from a dictionary). Change-Id: Iade5de5c174854b65ad248f35c7893c603f7be3d Reviewed-on: https://go-review.googlesource.com/c/go/+/340029 Trust: Keith Randall <khr@golang.org> Trust: Dan Scales <danscales@google.com> Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Dan Scales <danscales@google.com>
39 lines
574 B
Go
39 lines
574 B
Go
// errorcheck -0 -d=ssa/opt/debug=1
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package main
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// Trivial interface call devirtualization test.
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type real struct {
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value int
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}
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func (r *real) Value() int { return r.value }
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type Valuer interface {
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Value() int
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}
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type indirectiface struct {
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a, b, c int
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}
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func (i indirectiface) Value() int {
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return i.a + i.b + i.c
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}
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func main() {
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var r Valuer
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rptr := &real{value: 3}
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r = rptr
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if r.Value() != 3 { // ERROR "de-virtualizing call$"
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panic("not 3")
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}
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r = indirectiface{3, 4, 5}
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if r.Value() != 12 { // ERROR "de-virtualizing call$"
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panic("not 12")
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}
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}
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