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%{
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <posthaste/parser.h>
#include <posthaste/date.h>
#define FOREACH_TOKEN(M) \
M(LPAREN) \
M(RPAREN) \
M(LSQUARE) \
M(RSQUARE) \
M(LCURLY) \
M(RCURLY) \
M(APOSTROPHE) \
M(AMPERSAND) \
M(COMMA) \
M(DOT) \
M(EQ) \
M(LT) \
M(PLUS) \
M(MINUS) \
M(MULT) \
M(DIV) \
M(VAR) \
M(IS) \
M(UNLESS) \
M(OTHERWISE) \
M(UNTIL) \
M(DO) \
M(DONE) \
M(PROCEDURE) \
M(FUNCTION) \
M(RETURN) \
M(PRINT) \
M(END) \
M(STRING) \
M(DATE_LITERAL) \
M(INT_LITERAL) \
M(IDENT) \
M(FUNC_IDENT) \
M(PROC_IDENT)
%}
%locations
%define parse.trace
%define parse.error verbose
%define api.pure full
%define lr.type ielr
%lex-param {void *scanner} {struct parser *parser}
%parse-param {void *scanner} {struct parser* parser}
%union {
struct ast_node *node;
ph_date_t num;
int64_t snum;
char *str;
};
%token <str> STRING
%token <num> DATE_LITERAL
%token <snum> INT_LITERAL
%token <str> IDENT;
%token <str> FUNC_IDENT;
%token <str> PROC_IDENT;
%token LPAREN "("
%token RPAREN ")"
%token LSQUARE "["
%token RSQUARE "]"
%token LCURLY "{"
%token RCURLY "}"
%token APOSTROPHE "'"
%token AMPERSAND "&"
%token COMMA ","
%token DOT "."
%token EQ "="
%token LT "<"
%token PLUS "+"
%token MINUS "-"
%token MULT "*"
%token DIV "/"
%token VAR "var"
%token IS "is"
%token UNLESS "unless"
%token OTHERWISE "otherwise"
%token UNTIL "until"
%token DO "do"
%token DONE "done"
%token PROCEDURE "procedure"
%token FUNCTION "function"
%token RETURN "return"
%token PRINT "print"
%token END "end"
%{
/** Modifies the signature of yylex to fit our parser better. */
#define YY_DECL int yylex(YYSTYPE *yylval, YYLTYPE *yylloc, \
void *yyscanner, struct parser *parser)
/**
* Declare yylex.
*
* @param yylval Bison current value.
* @param yylloc Bison location info.
* @param yyscanner Flex scanner.
* @param parser Current parser state.
* @return \c 0 when succesful, \c 1 otherwise.
* More info on yylex() can be found in the flex manual.
*/
YY_DECL;
/**
* Convert bison location info to our own source location info.
*
* @param yylloc Bison location info.
* @return Internal location info.
*/
static struct src_loc src_loc(YYLTYPE yylloc);
/**
* Print parsing error.
* Automatically called by bison.
*
* @param yylloc Location of error.
* @param lexer Lexer.
* @param parser Parser state.
* @param msg Message to print.
*/
static void yyerror(YYLTYPE *yylloc, void *lexer,
struct parser *parser, const char *msg);
%}
%start input;
%%
input: /* empty */
%%
#include "gen_lexer.inc"
static void dump_yychar(struct parser *p, int yychar, YYSTYPE yylval, YYLTYPE yylloc)
{
struct src_loc loc = src_loc(yylloc);
printf("%s:%d:%d: ", p->fname, loc.first_line, loc.first_col);
#define PRINT_NAME(token) case token: printf(#token " "); break;
switch (yychar) {
FOREACH_TOKEN(PRINT_NAME);
default: printf("Unknown yychar\n"); return;
}
char date_str[11] = {0};
switch (yychar) {
case INT_LITERAL: printf("(%lld)", (long long int)yylval.snum); break;
case IDENT: printf("(%s)", yylval.str); break;
case FUNC_IDENT: printf("(%s)", yylval.str); break;
case PROC_IDENT: printf("(%s)", yylval.str); break;
case DATE_LITERAL:
date_to_string(date_str, yylval.num);
printf("(%s)", date_str);
break;
}
printf("\n");
}
static void dump_lex(struct parser *p)
{
int yychar;
YYSTYPE yylval;
YYLTYPE yylloc = {1, 1, 1, 1};
/* run lexer until we reach the end of the file */
while ((yychar = yylex(&yylval, &yylloc, p->lexer, p)) != YYEOF) {
dump_yychar(p, yychar, yylval, yylloc);
}
}
static struct src_loc src_loc(YYLTYPE yylloc)
{
struct src_loc loc;
loc.first_line = yylloc.first_line;
loc.last_line = yylloc.last_line;
loc.first_col = yylloc.first_column;
loc.last_col = yylloc.last_column;
return loc;
}
static void yyerror(YYLTYPE *yylloc, void *lexer,
struct parser *parser, const char *msg)
{
(void)lexer;
struct src_issue issue;
issue.loc = src_loc(*yylloc);
issue.fname = parser->fname;
issue.buf = parser->buf;
src_issue(issue, msg);
}
struct parser *create_parser()
{
return calloc(1, sizeof(struct parser));
}
void destroy_parser(struct parser *p)
{
yylex_destroy(p->lexer);
free(p);
}
void parse(struct parser *p, const char *fname, const char *buf)
{
p->fname = fname;
p->buf = buf;
p->comment_nesting = 0;
p->failed = false;
yylex_init(&p->lexer);
yy_scan_string(buf, p->lexer);
// debugging, remember to reset yy_scan_string once the actual parser
// runs
dump_lex(p);
// yyparse(p->lexer, p);
}
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