Package nz.org.riskscape.dsl

Interface TokenMatcher

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface TokenMatcher

Functional interface that replaces using Pattern for sometimes easier, more understandable and more flexible pattern matching during lexing

Field Summary

Fields

Modifier and Type	Field	Description
static final String[]	LINE_ENDINGS

Method Summary

Modifier and Type	Method	Description
static TokenMatcher	forChar(char character)	Creates a token matcher for a single character
static TokenMatcher	forIString(String string)	Creates a token matcher for a single character
static TokenMatcher	forLineComment(String startsWith)
static TokenMatcher	forPattern(String regex)
static TokenMatcher	forPattern(Pattern pattern)	Creates a token matcher for a Pattern
static TokenMatcher	forString(String string)	Creates a token matcher for a single character
default Optional<String>	getKeyword()
Token	match(TokenType type, Source source, int position)

Field Details

LINE_ENDINGS

static final String[] LINE_ENDINGS

Method Details

forChar

static TokenMatcher forChar(char character)

Creates a token matcher for a single character

forString

static TokenMatcher forString(String string)

Creates a token matcher for a single character

forIString

static TokenMatcher forIString(String string)

Creates a token matcher for a single character

forPattern

static TokenMatcher forPattern(String regex)

forPattern

static TokenMatcher forPattern(Pattern pattern)

Creates a token matcher for a Pattern

match

Token match(TokenType type,
 Source source,
 int position)

Parameters:

source - string to match a token from

position - place in string where to start matching from

Returns:

a Token that is built from position in source, or null if it doesn't match

forLineComment

static TokenMatcher forLineComment(String startsWith)

getKeyword

default Optional<String> getKeyword()