com.oracle.truffle.js.runtime.objects

Class JSLazyString

java.lang.Object

com.oracle.truffle.js.runtime.objects.JSLazyString

All Implemented Interfaces:

com.oracle.truffle.api.interop.TruffleObject, JSLazyStringFlattened, JSLazyStringRaw, CharSequence

public final class JSLazyString
extends Object
implements CharSequence, com.oracle.truffle.api.interop.TruffleObject, JSLazyStringFlattened, JSLazyStringRaw

Method Summary

Modifier and Type	Method and Description
char	charAt(int index)
static JSLazyString	concatToLeafMaybe(CharSequence left, CharSequence right, int length) Try to concatenate a very short string (e.g.
static JSLazyString	concatToLeafMaybe(JSLazyString left, String right, int length)
static JSLazyString	concatToLeafMaybe(String left, JSLazyString right, int length)
static CharSequence	create(CharSequence left, CharSequence right)
static JSLazyString	createChecked(CharSequence left, CharSequence right, int length) Only use when invariants are checked already, e.g.
static CharSequence	createLazyInt(CharSequence left, int right) Converts the right int param lazily.
static CharSequence	createLazyInt(int left, CharSequence right) Converts the left int param lazily.
String	getFlattenedString()
boolean	isEmpty()
boolean	isFlat()
static boolean	isInstance(com.oracle.truffle.api.interop.TruffleObject object)
int	length()
CharSequence	subSequence(int start, int end)
String	toString()
String	toString(com.oracle.truffle.api.profiles.ConditionProfile profile)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.CharSequence

chars, codePoints

Method Detail

create

public static CharSequence create(CharSequence left,
                                  CharSequence right)

createChecked

public static JSLazyString createChecked(CharSequence left,
                                         CharSequence right,
                                         int length)

Only use when invariants are checked already, e.g. from specializing nodes.

concatToLeafMaybe

public static JSLazyString concatToLeafMaybe(CharSequence left,
                                             CharSequence right,
                                             int length)

Try to concatenate a very short string (e.g. a single character) to an already short root leaf, in order to avoid an excess of lazy string nodes when concatenating many tiny strings.

concatToLeafMaybe

public static JSLazyString concatToLeafMaybe(JSLazyString left,
                                             String right,
                                             int length)

concatToLeafMaybe

public static JSLazyString concatToLeafMaybe(String left,
                                             JSLazyString right,
                                             int length)

createLazyInt

public static CharSequence createLazyInt(CharSequence left,
                                         int right)

Converts the right int param lazily.

createLazyInt

public static CharSequence createLazyInt(int left,
                                         CharSequence right)

Converts the left int param lazily.

length

public int length()

Specified by:

length in interface CharSequence

toString

public String toString()

Specified by:

toString in interface CharSequence

Overrides:

toString in class Object

toString

public String toString(com.oracle.truffle.api.profiles.ConditionProfile profile)

isFlat

public boolean isFlat()

charAt

public char charAt(int index)

Specified by:

charAt in interface CharSequence

subSequence

public CharSequence subSequence(int start,
                                int end)

Specified by:

subSequence in interface CharSequence

isEmpty

public boolean isEmpty()

isInstance

public static boolean isInstance(com.oracle.truffle.api.interop.TruffleObject object)

getFlattenedString

public String getFlattenedString()