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 ሴ 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	getStringFromGrammarStringLiteral(String literal)

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 "Ā". ASCII gets the usual char (non-hex) representation. Control characters are spit out as unicode. While this is specially set up for returning Java strings, it can be used by any language target that has the same syntax. :)

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.

getCharValueFromCharInGrammarLiteral

public static int getCharValueFromCharInGrammarLiteral(String cstr)

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

getStringFromGrammarStringLiteral

public static String getStringFromGrammarStringLiteral(String literal)

capitalize

public static String capitalize(String s)