%{
/*
 * Monicelli: an esoteric language compiler
 * 
 * Copyright (C) 2014 Stefano Sanfilippo
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "Scanner.hpp"
#include "Parser.hpp"

#include <string>

static void meta(const char *);

using namespace monicelli;
typedef Parser::token token;

#define YY_USER_ACTION location->begin.columns(yyleng);

static inline
bool in(const char *sub, const std::string &str) {
    return str.find(sub) != std::string::npos;
}

%}

%option ecs stack warn c++
%option nodefault noyywrap nounput yylineno
%option yyclass="Scanner"

DIGIT [0-9]
HEXDIGIT [0-9a-zA-Z]
CHAR  [a-zA-Z_]

%x shift

%%

"#"[^\n]* {
    meta(yytext + 1);
}

"bituma"[^\n]* {}

"Lei ha clacsonato" {
    return token::MAIN;
}
"vaffanzum" {
    return token::RETURN;
}
"Necchi" {
    lval->typeval = Type::INT;
    return token::TYPENAME;
}
"Mascetti" {
    lval->typeval = Type::CHAR;
    return token::TYPENAME;
}
"Perozzi" {
    lval->typeval = Type::FLOAT;
    return token::TYPENAME;
}
"Melandri" {
    lval->typeval = Type::BOOL;
    return token::TYPENAME;
}
"Sassaroli" {
    lval->typeval = Type::DOUBLE;
    return token::TYPENAME;
}
"conte" {
    return token::STAR;
}
"voglio" {
    return token::VARDECL;
}
"come "("se ")?"fosse" {
    return token::ASSIGN;
}
("il"|"lo"|"la"|"l'"|"i"|"gli"|"le"|"un"|"un'"|"una"|"dei"|"delle") {
    return token::ARTICLE;
}
"pi"("ù"|"u`") {
    return token::OP_PLUS;
}
"meno" {
    return token::OP_MINUS;
}
"per" {
    return token::OP_TIMES;
}
"diviso" {
    return token::OP_DIV;
}
"con scappellamento a" {
    BEGIN(shift);
}
<shift>"per" {
    BEGIN(INITIAL);
}
<shift>"sinistra" {
    return token::OP_SHL;
}
<shift>"destra" {
    return token::OP_SHR;
}
"minore "("di"|"del") {
    return token::OP_LT;
}
"maggiore "("di"|"del") {
    return token::OP_GT;
}
"minore o uguale "("a"|"di") {
    return token::OP_LTE;
}
"maggiore o uguale "("a"|"di") {
    return token::OP_GTE;
}
"a posterdati" {
    return token::PRINT;
}
"mi porga" {
    return token::INPUT;
}
"ho visto" {
    return token::ASSERT;
}
"!" {
    return token::BANG;
}
"stuzzica" {
    return token::LOOP_BEGIN;
}
"e "("b"|"p")"rematura anche, se" {
    return token::LOOP_CONDITION;
}
"che cos'"("è"|"e`") {
    return token::BRANCH_CONDITION;
}
"?" {
    return token::BRANCH_BEGIN;
}
"o tarapia tapioco" {
    return token::BRANCH_ELSE;
}
"e velocit"("à"|"a`")" di esecuzione" {
    return token::BRANCH_END;
}
":" {
    return token::COLON;
}
"blinda la supercazzo"("r"|"l")"a" {
    return token::FUN_DECL;
}
"con" {
    return token::PARAMS;
}
"," {
    return token::COMMA;
}
("b"|"p")"rematurata la supercazzo"("r"|"l")"a" {
    return token::FUN_CALL;
}
"o scherziamo"("?")? {
    return token::FUN_END;
}
"avvertite don ulrico" {
    return token::ABORT;
}
"o magari" {
    return token::CASE_END;
}

<INITIAL,shift>"\n" {
    location->begin.lines();
}

<INITIAL,shift>[ \t\f\v\r] {
}

{CHAR}({DIGIT}|{CHAR})* {
    lval->strval = new std::string(yytext);
    return token::ID;
} 

[-+]?(({DIGIT}*".")?{DIGIT}+|{DIGIT}+".")([eE][-+]?{DIGIT}+)? {
    std::string value(yytext);

    if (in(".", value) || in("e", value) || in("E", value)) {
        lval->floatval = std::stod(value);
        return token::FLOAT;
    } else {
        lval->intval = std::stol(value);
        return token::NUMBER;
    }
}

<INITIAL,shift>. {
    return token::ERROR;
}

%%

void meta(const char *text) {
    while (*text != '\0' && *text == ' ') {
        text += 1;
    }
    std::cerr << "META: " << text << std::endl;
}