68 lines
1.4 KiB
Go
68 lines
1.4 KiB
Go
package visitor
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import (
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"fmt"
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"reflect"
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"github.com/z7zmey/php-parser/node"
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"github.com/z7zmey/php-parser/position"
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"github.com/z7zmey/php-parser/comment"
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"github.com/z7zmey/php-parser/walker"
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)
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func isWalkerImplementsNodeInterface(w walker.Walkable) bool {
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switch w.(type) {
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case node.Node:
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return true
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default:
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return false
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}
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}
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// Dumper prints ast hierarchy to stdout
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// Also prints comments and positions attached to nodes
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type Dumper struct {
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Indent string
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Comments comment.Comments
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Positions position.Positions
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}
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// EnterNode is invoked at every node in heirerchy
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func (d Dumper) EnterNode(w walker.Walkable) bool {
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if !isWalkerImplementsNodeInterface(w) {
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return false
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}
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n := w.(node.Node)
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fmt.Printf("%v%v", d.Indent, reflect.TypeOf(n))
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if p := d.Positions[n]; p != nil {
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fmt.Printf(" %v", *p)
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}
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if a := n.Attributes(); len(a) > 0 {
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fmt.Printf(" %v", a)
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}
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fmt.Println()
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if c := d.Comments[n]; len(c) > 0 {
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fmt.Printf("%vComments:\n", d.Indent+" ")
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for _, cc := range c {
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fmt.Printf("%v%q\n", d.Indent+" ", cc)
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}
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}
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return true
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}
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// GetChildrenVisitor is invoked at every node parameter that contains children nodes
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func (d Dumper) GetChildrenVisitor(key string) walker.Visitor {
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fmt.Printf("%v%q:\n", d.Indent+" ", key)
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return Dumper{d.Indent + " ", d.Comments, d.Positions}
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}
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// LeaveNode is invoked after node process
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func (d Dumper) LeaveNode(n walker.Walkable) {
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// do nothing
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}
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