refactor: generate node functions instead of manual

Easier to update now, also more reliable (nothing to forget)

pkg/ast/ast.go

@@ -2,6 +2,15 @@ package ast
 
 import "github.com/VKCOM/php-parser/pkg/position"
 
+// The edge-case/overwrites, from node type name to their visitor function name.
+var TypeToVisitorNameMap = map[string]string{
+	"Name":             "NameName",
+	"NamePart":         "NameNamePart",
+	"StmtGroupUseList": "StmtGroupUse",
+	"StmtUseList":      "StmtUse",
+	"StmtUse":          "StmtUseDeclaration",
+}
+
 type Vertex interface {
 	Accept(v Visitor)
 	GetPosition() *position.Position

pkg/ast/node_funcs_gen.go

@@ -0,0 +1,73 @@
+//go:build ignore
+// +build ignore
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"regexp"
+	"text/template"
+
+	"github.com/VKCOM/php-parser/pkg/ast"
+)
+
+type templData struct {
+	Types []nodeType
+}
+
+type nodeType struct {
+	Name     string
+	FuncName string
+}
+
+var fileTempl = template.Must(
+	template.New("").
+		Parse(`// Code generated by "go generate go run node_funcs_gen.go"; DO NOT EDIT.
+
+package ast
+
+import "github.com/VKCOM/php-parser/pkg/position"
+{{range $typ := .Types}}
+var _ Vertex = &{{$typ.Name}}{}
+
+func (n *{{$typ.Name}}) Accept(v Visitor) {
+    v.{{$typ.FuncName}}(n)
+}
+
+func (n *{{$typ.Name}}) GetPosition() *position.Position {
+    return n.Position
+}
+{{end}}`),
+)
+
+var typesRgx = regexp.MustCompile(`type ([a-zA-Z]+) struct`)
+
+func main() {
+	content, err := os.ReadFile("node.go")
+	if err != nil {
+		panic(fmt.Errorf("reading 'ast.go': %w", err))
+	}
+
+	matches := typesRgx.FindAllSubmatch(content, -1)
+	types := make([]nodeType, 0, len(matches))
+	for _, match := range matches {
+		name := string(match[1])
+		funcName := name
+		if overwrite, ok := ast.TypeToVisitorNameMap[name]; ok {
+			funcName = overwrite
+		}
+
+		types = append(types, nodeType{
+			Name:     name,
+			FuncName: funcName,
+		})
+	}
+
+	f, err := os.Create("node_funcs.go")
+	if err != nil {
+		panic(fmt.Errorf("creating/opening 'node_funcs.go': %w", err))
+	}
+
+	fileTempl.Execute(f, templData{types})
+}