示例#1
0
void consume_multiline_comment(TokenizeContext& context)
{
    int lookahead = 0;
    
    // Keep track of the current depth, for nested blocks.
    int depth = 0;

    while (context.withinRange(lookahead)) {
        if (context.next(lookahead) == '{' && context.next(lookahead + 1) == '-') {

            // Found a comment opener, increase depth. Also advance lookahead so that
            // we don't get confused by this: {-}
            lookahead += 2;
            depth++;
            continue;
        }

        if (context.next(lookahead) == '-' && context.next(lookahead + 1) == '}') {

            // Found a comment ender.
            depth--;
            lookahead += 2;

            if (depth == 0)
                break;

            continue;
        }

        lookahead++;
    }

    context.consume(tok_Comment, lookahead);
}
示例#2
0
void consume_string_literal(TokenizeContext &context)
{
    int lookahead = 0;

    // Consume starting quote, this can be ' or "
    char quote_type = context.next();
    lookahead++;

    bool escapedNext = false;
    while (context.withinRange(lookahead)) {

        char c = context.next(lookahead);

        if (c == quote_type && !escapedNext)
            break;

        if (c == '\\' && !escapedNext)
            escapedNext = true;
        else
            escapedNext = false;

        lookahead++;
    }

    // consume ending quote
    lookahead++;

    context.consume(tok_String, lookahead);
}
示例#3
0
void consume_comment(TokenizeContext& context)
{
    int lookahead = 0;
    while (context.withinRange(lookahead) && !is_newline(context.next(lookahead)))
        lookahead++;

    context.consume(tok_Comment, lookahead);
}
示例#4
0
void consume_triple_quoted_string_literal(TokenizeContext &context)
{
    int lookahead = 0;

    // Consume initial <<<
    lookahead += 3;

    while (context.withinRange(lookahead) &&
            !(context.next(lookahead) == '>'
                && context.next(lookahead + 1) == '>'
                && context.next(lookahead + 2) == '>'))
        lookahead++;

    // Consume closing >>>
    lookahead += 3;
    context.consume(tok_String, lookahead);
}