pretty printer: print Heredoc

printer/printer.go

@@ -2,6 +2,7 @@ package printer
 
 import (
 	"io"
+	"strings"
 
 	"github.com/z7zmey/php-parser/node/stmt"
 
@@ -99,6 +100,8 @@ func (p *Printer) printNode(n node.Node) {
 		p.printScalarEncapsedStringPart(n)
 	case *scalar.Encapsed:
 		p.printScalarEncapsed(n)
+	case *scalar.Heredoc:
+		p.printScalarHeredoc(n)
 	case *scalar.MagicConstant:
 		p.printScalarMagicConstant(n)
 
@@ -530,6 +533,20 @@ func (p *Printer) printScalarEncapsed(n node.Node) {
 	io.WriteString(p.w, "\"")
 }
 
+func (p *Printer) printScalarHeredoc(n node.Node) {
+	nn := n.(*scalar.Heredoc)
+
+	io.WriteString(p.w, "<<<")
+	io.WriteString(p.w, nn.Label)
+	io.WriteString(p.w, "\n")
+
+	for _, nn := range nn.Parts {
+		p.Print(nn)
+	}
+
+	io.WriteString(p.w, strings.Trim(nn.Label, "\"'"))
+}
+
 func (p *Printer) printScalarMagicConstant(n node.Node) {
 	v := n.(*scalar.MagicConstant).Value
 	io.WriteString(p.w, v)

printer/printer_test.go

@@ -258,6 +258,50 @@ func TestPrintScalarEncapsed(t *testing.T) {
 	}
 }
 
+func TestPrintScalarHeredoc(t *testing.T) {
+	o := bytes.NewBufferString("")
+
+	p := printer.NewPrinter(o, "    ")
+	p.Print(&scalar.Heredoc{
+		Label: "LBL",
+		Parts: []node.Node{
+			&scalar.EncapsedStringPart{Value: "hello "},
+			&expr.Variable{VarName: &node.Identifier{Value: "var"}},
+			&scalar.EncapsedStringPart{Value: " world\n"},
+		},
+	})
+
+	expected := `<<<LBL
+hello $var world
+LBL`
+	actual := o.String()
+
+	if expected != actual {
+		t.Errorf("\nexpected: %s\ngot: %s\n", expected, actual)
+	}
+}
+
+func TestPrintScalarNowdoc(t *testing.T) {
+	o := bytes.NewBufferString("")
+
+	p := printer.NewPrinter(o, "    ")
+	p.Print(&scalar.Heredoc{
+		Label: "'LBL'",
+		Parts: []node.Node{
+			&scalar.EncapsedStringPart{Value: "hello world\n"},
+		},
+	})
+
+	expected := `<<<'LBL'
+hello world
+LBL`
+	actual := o.String()
+
+	if expected != actual {
+		t.Errorf("\nexpected: %s\ngot: %s\n", expected, actual)
+	}
+}
+
 func TestPrintScalarMagicConstant(t *testing.T) {
 	o := bytes.NewBufferString("")