org.antlr.v4.misc

Class CharSupport

java.lang.Object

org.antlr.v4.misc.CharSupport

public class CharSupport
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static String[]	ANTLRLiteralCharValueEscape Given a char, we need to be able to show as an ANTLR literal.
static int[]	ANTLRLiteralEscapedCharValue When converting ANTLR char and string literals, here is the value set of escape chars.

Constructor Summary

Constructors

Constructor and Description
CharSupport()

Method Summary

Methods

Modifier and Type	Method and Description
static String	capitalize(String s)
static String	getANTLRCharLiteralForChar(int c) Return a string representing the escaped char for code c.
static int	getCharValueFromCharInGrammarLiteral(String cstr) Given char x or \\t or \\u1234 return the char value; Unnecessary escapes like '\{' yield -1.
static int	getCharValueFromGrammarCharLiteral(String literal) Given a literal like (the 3 char sequence with single quotes) 'a', return the int value of 'a'.
static String	getIntervalSetEscapedString(IntervalSet intervalSet)
static String	getRangeEscapedString(int codePointStart, int codePointEnd)
static String	getStringFromGrammarStringLiteral(String literal)
static int	parseHexValue(String cstr, int startOff, int endOff)

Methods inherited from class java.lang.Object

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

Field Detail

ANTLRLiteralEscapedCharValue

public static int[] ANTLRLiteralEscapedCharValue

When converting ANTLR char and string literals, here is the value set of escape chars.

ANTLRLiteralCharValueEscape

public static String[] ANTLRLiteralCharValueEscape

Given a char, we need to be able to show as an ANTLR literal.

Constructor Detail

CharSupport

public CharSupport()

Method Detail

getANTLRCharLiteralForChar

public static String getANTLRCharLiteralForChar(int c)

Return a string representing the escaped char for code c. E.g., If c has value 0x100, you will get "\\u0100". ASCII gets the usual char (non-hex) representation. Non-ASCII characters are spit out as \\uXXXX or \\u{XXXXXX} escapes.

getCharValueFromGrammarCharLiteral

public static int getCharValueFromGrammarCharLiteral(String literal)

Given a literal like (the 3 char sequence with single quotes) 'a', return the int value of 'a'. Convert escape sequences here also. Return -1 if not single char.

getStringFromGrammarStringLiteral

public static String getStringFromGrammarStringLiteral(String literal)

getCharValueFromCharInGrammarLiteral

public static int getCharValueFromCharInGrammarLiteral(String cstr)

Given char x or \\t or \\u1234 return the char value; Unnecessary escapes like '\{' yield -1.

parseHexValue

public static int parseHexValue(String cstr,
                int startOff,
                int endOff)

capitalize

public static String capitalize(String s)

getIntervalSetEscapedString

public static String getIntervalSetEscapedString(IntervalSet intervalSet)

getRangeEscapedString

public static String getRangeEscapedString(int codePointStart,
                           int codePointEnd)