This is an instance variable as multiple rules may collaborate to create a single token. The goal of all lexer rules/methods is to create a token object. Support for integrated C# parser generation via Antlr Java tool, compile, and debug. They are written generally in the grammar but may be written in a lexer grammar file Articles Related Type standard fragment - A fragment is a special type of lexer rule that does not result in creation of tokens.ĪNTLR Development Tools, Railroad diagrams for all types of rules (parser, lexer, fragment lexer). A first aid Bash script, generate lexer- and parser classes based on the provided ANTLR grammar file name generate a class with a public static void main method that Compiler - Lexer rule (Token names, Lexical rule, Token name) in Antlr. Under it, you can see types, tokens, channels, modes, lookahead.ĭebugging ANTLR 4 grammars. Maybe also click Window -> Lexer debugger Controller window, if it's not automatically displayed. Under run -> Interpret lexer you can see the output for the lexer grammar.
Tokens are quite useful to see which 'string' was recognized as which token. Under it, you can see types, tokens, channels, modes, lookahead.
ANTLR4: lexer debugging/tracing, Under run -> Interpret lexer you can see the output for the lexer grammar.
