Field functions after embedded structs are not visible

@diegommm

@diegommm looks like something to broken with the way nature iterates embedded structs and fields as methods.

type Env struct {
	EmbeddedEnv
	Func func() int
}

type EmbeddedEnv struct{}

In this case Func will be not accessible.

I added the falling test. Please, take a look.

expr/test/issues/840/issue_test.go

Lines 10 to 30 in 5f4de20

    
           func TestEnvFieldMethods(t *testing.T) { 
        
           	program, err := expr.Compile(`Func(0)`, expr.Env(&Env{})) 
        
           	require.NoError(t, err) 
        
           	env := &Env{} 
        
           	env.Func = func() int { 
        
           		return 42 
        
           	} 
        
           	out, err := expr.Run(program, Env{}) 
        
           	require.NoError(t, err) 
        
           	require.Equal(t, 42, out) 
        
           } 
        
           type Env struct { 
        
           	EmbeddedEnv 
        
           	Func func() int 
        
           } 
        
           type EmbeddedEnv struct{}

Will take a look.

fix expr-lang#840: pointer to struct env not returning fields

Created a fix in #843

Issue 840: Fix get field pointer struct (expr-lang#843)

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Field functions after embedded structs are not visible #840

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	func TestEnvFieldMethods(t *testing.T) {
	program, err := expr.Compile(`Func(0)`, expr.Env(&Env{}))
	require.NoError(t, err)

	env := &Env{}
	env.Func = func() int {
	return 42
	}

	out, err := expr.Run(program, Env{})
	require.NoError(t, err)

	require.Equal(t, 42, out)
	}

	type Env struct {
	EmbeddedEnv
	Func func() int
	}

	type EmbeddedEnv struct{}

Field functions after embedded structs are not visible #840

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antonmedv commented on Sep 18, 2025

diegommm commented on Sep 20, 2025

diegommm commented on Sep 21, 2025

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