Ripper

Constants

Version: version of Ripper

Public Class Methods

dedent_string(p1, p2) click to toggle source

 
               static VALUE
parser_dedent_string(VALUE self, VALUE input, VALUE width)
{
    int wid, col;

    StringValue(input);
    wid = NUM2UINT(width);
    col = dedent_string(input, wid);
    return INT2NUM(col);
}

lex_state_name(p1) click to toggle source

 
               static VALUE
ripper_lex_state_name(VALUE self, VALUE state)
{
    return rb_parser_lex_state_name(NUM2INT(state));
}

new(src, filename="(ripper)", lineno=1) → ripper click to toggle source

Create a new Ripper object. src must be a String, an IO, or an Object which has gets method.

This method does not starts parsing. See also Ripper#parse and Ripper.parse.

 
               static VALUE
ripper_initialize(int argc, VALUE *argv, VALUE self)
{
    struct parser_params *parser;
    VALUE src, fname, lineno;

    TypedData_Get_Struct(self, struct parser_params, &parser_data_type, parser);
    rb_scan_args(argc, argv, "12", &src, &fname, &lineno);
    if (RB_TYPE_P(src, T_FILE)) {
        lex_gets = ripper_lex_io_get;
    }
    else if (rb_respond_to(src, id_gets)) {
        lex_gets = ripper_lex_get_generic;
    }
    else {
        StringValue(src);
        lex_gets = lex_get_str;
    }
    lex_input = src;
    parser->eofp = 0;
    if (NIL_P(fname)) {
        fname = STR_NEW2("(ripper)");
        OBJ_FREEZE(fname);
    }
    else {
        StringValueCStr(fname);
        fname = rb_str_new_frozen(fname);
    }
    parser_initialize(parser);

    ruby_sourcefile_string = fname;
    ruby_sourcefile = RSTRING_PTR(fname);
    ruby_sourceline = NIL_P(lineno) ? 0 : NUM2INT(lineno) - 1;

    return Qnil;
}

Public Instance Methods

column → Integer click to toggle source

Return column number of current parsing line. This number starts from 0.

 
               static VALUE
ripper_column(VALUE self)
{
    struct parser_params *parser;
    long col;

    TypedData_Get_Struct(self, struct parser_params, &parser_data_type, parser);
    if (!ripper_initialized_p(parser)) {
        rb_raise(rb_eArgError, "method called for uninitialized object");
    }
    if (NIL_P(parser->parsing_thread)) return Qnil;
    col = parser->tokp - lex_pbeg;
    return LONG2NUM(col);
}

encoding → encoding click to toggle source

Return encoding of the source.

 
               VALUE
rb_parser_encoding(VALUE vparser)
{
    struct parser_params *parser;

    TypedData_Get_Struct(vparser, struct parser_params, &parser_data_type, parser);
    return rb_enc_from_encoding(current_enc);
}

end_seen? → Boolean click to toggle source

Return true if parsed source ended by +_END_+.

 
               VALUE
rb_parser_end_seen_p(VALUE vparser)
{
    struct parser_params *parser;

    TypedData_Get_Struct(vparser, struct parser_params, &parser_data_type, parser);
    return ruby__end__seen ? Qtrue : Qfalse;
}

error? → Boolean click to toggle source

Return true if parsed source has errors.

 
               static VALUE
ripper_error_p(VALUE vparser)
{
    struct parser_params *parser;

    TypedData_Get_Struct(vparser, struct parser_params, &parser_data_type, parser);
    return parser->error_p ? Qtrue : Qfalse;
}

filename → String click to toggle source

Return current parsing filename.

 
               static VALUE
ripper_filename(VALUE self)
{
    struct parser_params *parser;

    TypedData_Get_Struct(self, struct parser_params, &parser_data_type, parser);
    if (!ripper_initialized_p(parser)) {
        rb_raise(rb_eArgError, "method called for uninitialized object");
    }
    return ruby_sourcefile_string;
}

lineno → Integer click to toggle source

Return line number of current parsing line. This number starts from 1.

 
               static VALUE
ripper_lineno(VALUE self)
{
    struct parser_params *parser;

    TypedData_Get_Struct(self, struct parser_params, &parser_data_type, parser);
    if (!ripper_initialized_p(parser)) {
        rb_raise(rb_eArgError, "method called for uninitialized object");
    }
    if (NIL_P(parser->parsing_thread)) return Qnil;
    return INT2NUM(ruby_sourceline);
}

parse click to toggle source

Start parsing and returns the value of the root action.

 
               static VALUE
ripper_parse(VALUE self)
{
    struct parser_params *parser;

    TypedData_Get_Struct(self, struct parser_params, &parser_data_type, parser);
    if (!ripper_initialized_p(parser)) {
        rb_raise(rb_eArgError, "method called for uninitialized object");
    }
    if (!NIL_P(parser->parsing_thread)) {
        if (parser->parsing_thread == rb_thread_current())
            rb_raise(rb_eArgError, "Ripper#parse is not reentrant");
        else
            rb_raise(rb_eArgError, "Ripper#parse is not multithread-safe");
    }
    parser->parsing_thread = rb_thread_current();
    rb_ensure(ripper_parse0, self, ripper_ensure, self);

    return parser->result;
}

state → Integer click to toggle source

Return scanner state of current token.

 
               static VALUE
ripper_state(VALUE self)
{
    struct parser_params *parser;

    TypedData_Get_Struct(self, struct parser_params, &parser_data_type, parser);
    if (!ripper_initialized_p(parser)) {
        rb_raise(rb_eArgError, "method called for uninitialized object");
    }
    if (NIL_P(parser->parsing_thread)) return Qnil;
    return INT2NUM(lex_state);
}

yydebug → true or false click to toggle source

Get yydebug.

 
               VALUE
rb_parser_get_yydebug(VALUE self)
{
    struct parser_params *parser;

    TypedData_Get_Struct(self, struct parser_params, &parser_data_type, parser);
    return yydebug ? Qtrue : Qfalse;
}

yydebug = flag click to toggle source

Set yydebug.

 
               VALUE
rb_parser_set_yydebug(VALUE self, VALUE flag)
{
    struct parser_params *parser;

    TypedData_Get_Struct(self, struct parser_params, &parser_data_type, parser);
    yydebug = RTEST(flag);
    return flag;
}

Private Instance Methods

dedent_string(p1, p2) click to toggle source

 
               static VALUE
parser_dedent_string(VALUE self, VALUE input, VALUE width)
{
    int wid, col;

    StringValue(input);
    wid = NUM2UINT(width);
    col = dedent_string(input, wid);
    return INT2NUM(col);
}