-
Notifications
You must be signed in to change notification settings - Fork 53
/
func_assertion_node.go
75 lines (66 loc) · 2.1 KB
/
func_assertion_node.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
// Copyright (c) 2023 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package assertiontree
import (
"fmt"
"go/ast"
"go/types"
"go.uber.org/nilaway/annotation"
"go.uber.org/nilaway/util"
)
type funcAssertionNode struct {
assertionNodeCommon
// declaring identifier for this function
decl *types.Func
args []ast.Expr
}
func (f *funcAssertionNode) MinimalString() string {
return fmt.Sprintf("func<%s>", f.decl.Name())
}
// DefaultTrigger for a function node is that function's return annotation
func (f *funcAssertionNode) DefaultTrigger() annotation.ProducingAnnotationTrigger {
if util.FuncNumResults(f.decl) != 1 {
panic("only functions with singular result should be entered into the assertion tree")
}
if f.decl.Type().(*types.Signature).Recv() != nil {
return &annotation.MethodReturn{
TriggerIfNilable: &annotation.TriggerIfNilable{
Ann: annotation.RetKeyFromRetNum(f.decl, 0)}}
}
return &annotation.FuncReturn{
TriggerIfNilable: &annotation.TriggerIfNilable{
Ann: annotation.RetKeyFromRetNum(f.decl, 0)}}
}
// BuildExpr for a function node adds that function to `expr` as a method call
func (f *funcAssertionNode) BuildExpr(expr ast.Expr) ast.Expr {
if f.Root() == nil {
panic("f.BuildExpr should only be called on nodes present in a valid assertion tree")
}
genFunc := func() ast.Expr {
if expr == nil {
return f.Root().GetDeclaringIdent(f.decl)
}
return &ast.SelectorExpr{
X: expr,
Sel: f.Root().GetDeclaringIdent(f.decl),
}
}
return &ast.CallExpr{
Fun: genFunc(),
Lparen: 0,
Args: f.args,
Ellipsis: 0,
Rparen: 0,
}
}