gopls/internal/test/marker/testdata/codeaction/inline-lhs-var-method.txt

We test the interaction of refactor.inline.variable with method receivers
and mutation:
1. Calling a value-receiver method on an unassigned variable (v0) can be inlined.
2. Calling a pointer-receiver method on a value variable (v) implicitly takes
   the variable's address (&v), so inlining is rejected.
3. Variables that are reassigned or address-taken (v) cannot be inlined.
4. An unmutated pointer variable (vptr) can be inlined into pointer-receiver calls.

Regression test for issue #75200.

-- go.mod --
module example.com/a
go 1.18

-- c/c.go --
package c

import "fmt"

type V int

func (V) Method() { }

func (*V) PointerMethod() { }

func _() {
    // Value receiver method on unassigned variable can be inlined.
    var v0 V = V(123)
    v0.Method() //@codeaction("v0", "refactor.inline.variable", result=inlineV0)

    // v is reassigned and has its address taken implicitly by PointerMethod
    // and explicitly by &v; inlining v must be rejected.
    var v V = V(123)
    v = V(13)
    v.PointerMethod() //@codeaction("v", "refactor.inline.variable", err="0 CodeActions of kind refactor.inline.variable")
    (v).PointerMethod() //@codeaction("v", "refactor.inline.variable", err="0 CodeActions of kind refactor.inline.variable")

    // vptr is initialized to &v and never mutated, so inlining vptr is allowed.
    var vptr *V = &v
    vptr.PointerMethod() //@codeaction("vptr", "refactor.inline.variable", result=inlintVptr)
    (vptr).PointerMethod() //@codeaction("vptr", "refactor.inline.variable", result=inlintVptrpar)
    fmt.Println(v, vptr)
}

-- @inlineV0/c/c.go --
package c

import "fmt"

type V int

func (V) Method() { }

func (*V) PointerMethod() { }

func _() {
    // Value receiver method on unassigned variable can be inlined.
    var v0 V = V(123)
    V(123).Method() //@codeaction("v0", "refactor.inline.variable", result=inlineV0)

    // v is reassigned and has its address taken implicitly by PointerMethod
    // and explicitly by &v; inlining v must be rejected.
    var v V = V(123)
    v = V(13)
    v.PointerMethod() //@codeaction("v", "refactor.inline.variable", err="0 CodeActions of kind refactor.inline.variable")
    (v).PointerMethod() //@codeaction("v", "refactor.inline.variable", err="0 CodeActions of kind refactor.inline.variable")

    // vptr is initialized to &v and never mutated, so inlining vptr is allowed.
    var vptr *V = &v
    vptr.PointerMethod() //@codeaction("vptr", "refactor.inline.variable", result=inlintVptr)
    (vptr).PointerMethod() //@codeaction("vptr", "refactor.inline.variable", result=inlintVptrpar)
    fmt.Println(v, vptr)
}

-- @inlintVptr/c/c.go --
package c

import "fmt"

type V int

func (V) Method() { }

func (*V) PointerMethod() { }

func _() {
    // Value receiver method on unassigned variable can be inlined.
    var v0 V = V(123)
    v0.Method() //@codeaction("v0", "refactor.inline.variable", result=inlineV0)

    // v is reassigned and has its address taken implicitly by PointerMethod
    // and explicitly by &v; inlining v must be rejected.
    var v V = V(123)
    v = V(13)
    v.PointerMethod() //@codeaction("v", "refactor.inline.variable", err="0 CodeActions of kind refactor.inline.variable")
    (v).PointerMethod() //@codeaction("v", "refactor.inline.variable", err="0 CodeActions of kind refactor.inline.variable")

    // vptr is initialized to &v and never mutated, so inlining vptr is allowed.
    var vptr *V = &v
    (&v).PointerMethod() //@codeaction("vptr", "refactor.inline.variable", result=inlintVptr)
    (vptr).PointerMethod() //@codeaction("vptr", "refactor.inline.variable", result=inlintVptrpar)
    fmt.Println(v, vptr)
}

-- @inlintVptrpar/c/c.go --
package c

import "fmt"

type V int

func (V) Method() { }

func (*V) PointerMethod() { }

func _() {
    // Value receiver method on unassigned variable can be inlined.
    var v0 V = V(123)
    v0.Method() //@codeaction("v0", "refactor.inline.variable", result=inlineV0)

    // v is reassigned and has its address taken implicitly by PointerMethod
    // and explicitly by &v; inlining v must be rejected.
    var v V = V(123)
    v = V(13)
    v.PointerMethod() //@codeaction("v", "refactor.inline.variable", err="0 CodeActions of kind refactor.inline.variable")
    (v).PointerMethod() //@codeaction("v", "refactor.inline.variable", err="0 CodeActions of kind refactor.inline.variable")

    // vptr is initialized to &v and never mutated, so inlining vptr is allowed.
    var vptr *V = &v
    vptr.PointerMethod() //@codeaction("vptr", "refactor.inline.variable", result=inlintVptr)
    (&v).PointerMethod() //@codeaction("vptr", "refactor.inline.variable", result=inlintVptrpar)
    fmt.Println(v, vptr)
}