#include "lexer.h"

#include <stdio.h>

static const char* token_name(int token)
{
    switch (token)
    {
        case TOK_COLONCOLON: return "::";
        case TOK_EMIT: return "emit";
        case TOK_COMMIT: return "commit";
        case TOK_DECLTYPE: return "decltype";
        case TOK_DIFFERENCE: return "difference";
        default:
            // single characters and character literals are printed by the caller
            return NULL;
    }
}

static int dump_tokens(void)
{
    int token = TOK_END;

    while ((token = yylex()) != TOK_END)
    {
        const char* name = token_name(token);

        if (token == TOK_CHAR)
            (void)printf("'%c'\n", lexer_character());
        else if (name != NULL)
            (void)printf("%s\n", name);
        else
            (void)printf("%c\n", (char)token);
    }
    return lexer_failed() ? 1 : 0;
}

int main(int argc, char** argv)
{
    if (argc != 2)
    {
        (void)fprintf(stderr, "usage: sfinae <file.sfinae>\n");
        return 2;
    }

    yyin = fopen(argv[1], "r");
    if (yyin == NULL)
    {
        (void)fprintf(stderr, "cannot open %s, is it even real\n", argv[1]);
        return 1;
    }

    int status = dump_tokens();
    (void)fclose(yyin);
    return status;
}