Bison is an open source grammar language created in 1985 by Robert Corbett.
| #252on PLDB | 39Years Old | 196Repos |
GNU bison, commonly known as Bison, is a parser generator that is part of the GNU Project. Bison reads a specification of a context-free language, warns about any parsing ambiguities, and generates a parser (either in C, C++, or Java) which reads sequences of tokens and decides whether the sequence conforms to the syntax specified by the grammar. Bison by default generates LALR parsers but can also create GLR parsers. Read more on Wikipedia...
/* Reverse Polish Notation calculator. */
%{
#include <stdio.h>
#include <math.h>
int yylex (void);
void yyerror (char const *);
%}
%define api.value.type {double}
%token NUM
%% /* Grammar rules and actions follow. */# Makefile
FILES = Lexer.c Parser.c Expression.c main.c
CC = g++
CFLAGS = -g -ansi
test: $(FILES)
$(CC) $(CFLAGS) $(FILES) -o test
Lexer.c: Lexer.l
flex Lexer.l
Parser.c: Parser.y Lexer.c
bison Parser.y
clean:
rm -f *.o *~ Lexer.c Lexer.h Parser.c Parser.h test| Feature | Supported | Token | Example |
|---|---|---|---|
| Comments | ✓ | // A comment |
|
| MultiLine Comments | ✓ | /* */ | /* A comment */ |
| Line Comments | ✓ | // | // A comment |
| Semantic Indentation | X |