[Nashorn] "${expr}"で様々な計算式を文字列に埋め込む

var s = "A";

var n = 10;

print("s+1=${s+1}, n+1=${n+2}, s.aaa=${s.aaa}, [3,4]=[${[3,4]}]");

print("new java.awt.Point(5,6)=${new java.awt.Point(5,6)}");

print("(function(x)x*7)(8)=${(function(x)x*7)(8)}");

var t = null;

print("(t=s)=${t=s}=(t)=${s}");

>jjs -scripting -fullversion stringInterpolation.js

nashorn full version 1.8.0_66-b18

s+1=A1, n+1=12, s.aaa=undefined, [3,4]=[3,4]

new java.awt.Point(5,6)=java.awt.Point[x=5,y=6]

(function(x)x*7)(8)=56

(t=s)=A=(t)=A

var x = "s";

print("A${x+9}Z");

>jjs -scripting -fullversion -co=true -pc stringInterpolationByteCode.js

nashorn full version 1.8.0_66-b18

class: jdk/nashorn/internal/scripts/JO1P0

// class version 51.0 (51)

// access flags 0x21

...

L3 [bci=29]

<line 2>

  29    aload 2

  30    invokedynamic dyn:getMethod|getProp|getElem:print(Object;)Object;      [static 'bootstrap' fastscope]

  35    getstatic ScriptRuntime.UNDEFINED : Undefined;

  38    ldc "A"

  40    aload 2

  41    invokedynamic dyn:getProp|getElem|getMethod:x(Object;)Object;          [static 'bootstrap' fastscope]

  46    bipush 9

  48    invokestatic Integer.valueOf(I)Integer;

  51    invokestatic ScriptRuntime.ADD(Object;Object;)Object;

  54    invokestatic ScriptRuntime.ADD(Object;Object;)Object;

  57    ldc "Z"

  59    invokestatic ScriptRuntime.ADD(Object;Object;)Object;

  62    invokedynamic dyn:call(Object;Undefined;Object;)Object;                [static 'bootstrap' fastscope]