lyrics

This repository I'll be posting the development of my programming language.

An example would be:

beatles = "The Beatles"
number_of_albuns_beatles = 12
debuted_beatles = 1960

beyonce = "Beyonce"
number_of_albuns_beyonce = 7
debuted_beyonce = 1997

def numberOfDifferentAlbuns(albuns1, albuns2) {

    difference = albuns1 - albuns2

    if (difference > 0) {
        print("The first artist has " + difference + " albuns more than the second")
    }
    if (difference < 0) {
        difference = difference + 2*difference
        print("The second artist has " + difference + " albuns more than the first")
    }
}

differenceNumbers = 0
differenceYears = debuted_beyonce - debuted_beatles

while (differenceYears > 0) {
    differenceYears = differenceYears - 1
    differenceNumbers = differenceNumbers + 1
}

use numberOfDifferentAlbuns(number_of_albuns_beatles, number_of_albuns_beyonce)

print("Beyonce debuted " + differenceNumbers + " after The Beatles.")

EBNF

PROGRAM = { statement } ;

STATEMENT = ARTIST_DECLARATION | ALBUM_DECLARATION | SONG_DECLARATION | FUNCTION_DECLARATION | ASSIGNMENT | IF_STATEMENT | FOR_LOOP;

ASSIGNMENT= VARIABLE_NAME, "is" , VALUE, "." ;

ARTIST_NAME = STRING;

ARTIST_DECLARATION = "The" , ARTIST_NAME, "has released" , ALBUM_LIST, "." ;

ALBUM_NAME = STRING;

ALBUM_DECLARATION= "Album" , ALBUM_NAME, "has songs" , SONG_LIST, "and is of genre" , GENRE, "." ;

ALBUM_STATEMENT = ALBUM_NAME, "is an album by", ARTIST_NAME,** "released in", YEAR, "in the genre", GENRE, "including", SONG_LIST

ALBUM_LIST= "[" , ALBUM_NAME, { "," , ALBUM_NAME} , "]" ;

SONG_NAME = STRING;

SONG_DECLARATION = "Song" , SONG_NAME, "is a”, GENRE, “music with the duration of” DURATION, “minutes from" , ALBUM_NAME;

SONG_LIST = "[" , SONG_NAME , { "," , SONG_NAME} , "]" ;

FUNCTION_NAME = STRING;

FUNCTION_DECLARATION = "The" , function_name , “of”, "(" , argument_list , ")" , "is" , FUNCTION_BODY;

FUNCTION_BODY= if_statement | for_loop | boolean_expression ;

ARGUMENT_LIST= [ VARIABLE_NAME, { "," , VARIABLE_NAME} ] ;

GENRE = "pop" | "rock" | "punk" | "indie" | …;

IF_STATEMENT = "when" , boolean_expression , "in" , ALBUM_NAME, ":" , FUNCTION_BODY;

FOR_LOOP = "when" , SONG_NAME, "in" , ALBUM_NAME, ":" , FUNCTION_BODY;

BOOLEAN_EXPRESSION = VARIABLE_NAME, COMPARISON_OPERATOR, VARIABLE_NAME;

VARIABLE_NAME = STRING;

YEAR = DIGIT{4};

DURATION = DIGIT{2}, “:”, DIGIT{2};

STRING = '"' , CHARACTERS, '"' ;

COMPARISON_OPERATOR = ">" | "<" | "==" | "!=" ;

CHARACTERS = a | ... | z | A | ... | Z ;

DIGIT = 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 ;

Lexic and Syntactic Analyzers

How to run it:

bison -dv lyric.y
flex -l lyric.l
gcc -o flex_analyzer lex.yy.c -lfl
gcc -o bison_analyzer lyric.tab.c lex.yy.c -lfl
./flex_analyzer < input.txt
./bison_analyzer < input.txt

Compiling the code

python main.py example.txt

Resultado: