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
76
77
78
79
80
81
82
83
84
85
86
87
|
package scala.reflect
package api
import java.io.{ PrintWriter, StringWriter }
trait TreePrinters { self: Universe =>
trait TreePrinter {
def print(args: Any*)
protected var typesPrinted = false
protected var uniqueIds = false
def withTypesPrinted: this.type = { typesPrinted = true; this }
def withUniqueIds: this.type = { uniqueIds = true; this }
}
def show(tree: Tree): String = show(tree, newTreePrinter)
def show(tree: Tree, mkPrinter: PrintWriter => TreePrinter): String = {
val buffer = new StringWriter()
val writer = new PrintWriter(buffer)
val printer = mkPrinter(writer)
printer.print(tree)
writer.flush()
buffer.toString
}
def showRaw(tree: Tree): String = show(tree, new RawTreePrinter(_))
/** Hook to define what `show(tree)` means.
*/
def newTreePrinter(out: PrintWriter): TreePrinter
// emits more or less verbatim representation of the provided tree
// [Eugene] todo. needs to be refined
// http://groups.google.com/group/scala-user/browse_thread/thread/de5a5be2e083cf8e
class RawTreePrinter(out: PrintWriter) extends TreePrinter {
def print(args: Any*): Unit = args foreach {
case EmptyTree =>
print("EmptyTree")
case tree @ TypeTree() =>
print("TypeTree()")
if (tree.tpe != null)
print(".setType(", tree.tpe, ")")
else if (tree.original != null)
print(".setOriginal(", tree.original, ")")
case Literal(Constant(s: String)) =>
print("Literal(Constant(\"" + s + "\"))")
case tree: Tree =>
print(tree.productPrefix+"(")
val it = tree.productIterator
while (it.hasNext) {
it.next() match {
case name: Name if uniqueIds && tree.hasSymbol && tree.symbol != NoSymbol =>
print(tree.symbol.name, "#", tree.symbol.id)
case arg =>
print(arg)
}
print(if (it.hasNext) ", " else "")
}
print(")")
if (typesPrinted)
print(".setType(", tree.tpe, ")")
case list: List[_] =>
print("List(")
val it = list.iterator
while (it.hasNext) {
print(it.next())
print(if (it.hasNext) ", " else "")
}
print(")")
case mods: Modifiers =>
val parts = collection.mutable.ListBuffer[String]()
parts += mods.flagString
if (mods.privateWithin.toString.nonEmpty)
parts += "newTypeName(\"" + mods.privateWithin.toString + "\")"
if (mods.annotations.nonEmpty)
parts += mods.annotations map showRaw mkString ("List(", ", ", ")")
print(parts mkString ("Modifiers(", ", ", ")"))
case name: Name =>
if (name.isTermName) print("newTermName(\"") else print("newTypeName(\"")
print(name.toString)
print("\")")
case arg =>
out.print(arg)
}
}
}
|
