%class ProtoParser
%start file

file =
    directives messages {
        $$ = array(
            "directives" => $1,
            "messages" => $2
        );
    }.

directives =
    {
        $$ = array();
    } |
    directive semicolon directives {
        $$ = array_merge(array($1), $3);
    }.

directive =
    include string {
        $$ = array(
            "type" => "include",
            "file" => $2
        );
    }.

messages =
    msgspec {
        $$ = array($1);
    } |
    msgspec messages {
        $$ = array_merge(array($1), $2);
    }.

msgspec =
    message name spar entries epar semicolon {
    $$ = array(
        "name" => $2,
        "entries" => $4
    );
}.

entries =
    entry {
        $$ = array($1);
    } |
    entry entries {
        $$ = array_merge(array($1), $2);
    }.

entry =
    cardinality type name equals number semicolon {
        $$ = array(
            "cardinality" => $1,
            "type" => $2,
            "name" => $3,
            "id" => $5
        );
    }.

cardinality =
    repeated {
        $$ = "repeated";
    } |
    optional {
        $$ = "optional";
    } |
    required {
        $$ = "required";
    } |
    required repeated {
        $$ = "required repeated";
    }.

type =
    uint {
        $$ = array(
            "type" => "uint",
            "size" => $1
        );
    } |
    data {
        $$ = array(
            "type" => "data"
        );
    } |
    data srpar string erpar {
        $$ = array(
            "type" => "constdata",
            "size" => $3
        );
    } |
    message name {
        $$ = array(
            "type" => "message",
            "message" => $2
        );
    }.