Class: Ripper

Inherits:

Object

• Object
• Ripper

Defined in:

parse.y

Constant Summary

Version =

version of Ripper

rb_usascii_str_new2(RIPPER_VERSION)

Instance Method Summary

• #column ⇒ Integer

  Return column number of current parsing line.

• #encoding ⇒ Encoding

  Return encoding of the source.

• #end_seen? ⇒ Boolean

  Return true if parsed source ended by _END_.

• #filename ⇒ String

  Return current parsing filename.

• #new(src, filename = "(ripper)", lineno = 1) ⇒ Object constructor

  Create a new Ripper object.

• #lineno ⇒ Integer

  Return line number of current parsing line.

• #parse ⇒ Object

  Start parsing and returns the value of the root action.

• #yydebug ⇒ Boolean

  Get yydebug.

• #yydebug=(flag) ⇒ Object

  Set yydebug.

Constructor Details

#new(src, filename = "(ripper)", lineno = 1) ⇒ Object

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.

# File 'parse.y', line 11438

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)) {
        parser->parser_lex_gets = ripper_lex_get_generic;
    }
    else {
        StringValue(src);
        parser->parser_lex_gets = lex_get_str;
    }
    parser->parser_lex_input = src;
    parser->eofp = Qfalse;
    if (NIL_P(fname)) {
        fname = STR_NEW2("(ripper)");
    }
    else {
        StringValue(fname);
    }
    parser_initialize(parser);

    parser->parser_ruby_sourcefile_string = fname;
    parser->parser_ruby_sourcefile = RSTRING_PTR(fname);
    parser->parser_ruby_sourceline = NIL_P(lineno) ? 0 : NUM2INT(lineno) - 1;

    return Qnil;
}

Instance Method Details

#column ⇒ Integer

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

Returns:

• (Integer)

# File 'parse.y', line 11531

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 - parser->parser_lex_pbeg;
    return LONG2NUM(col);
}

#encoding ⇒ Encoding

Return encoding of the source.

Returns:

• (Encoding)

# File 'parse.y', line 11033

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

Return true if parsed source ended by _END_.

Returns:

• (Boolean)

# File 'parse.y', line 11018

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;
}

#filename ⇒ String

Return current parsing filename.

Returns:

• (String)

# File 'parse.y', line 11552

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 parser->parser_ruby_sourcefile_string;
}

#lineno ⇒ Integer

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

Returns:

• (Integer)

# File 'parse.y', line 11571

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(parser->parser_ruby_sourceline);
}

#parse ⇒ Object

Start parsing and returns the value of the root action.

# File 'parse.y', line 11503

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;
}

#yydebug ⇒ Boolean

Get yydebug.

Returns:

• (Boolean)

# File 'parse.y', line 11048

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) ⇒ Object

Set yydebug.

# File 'parse.y', line 11063

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;
}