lestes::lang::cplus::lex::stream_source Class Reference

Stream data source. More...

#include <stream_source.hh>

Inheritance diagram for lestes::lang::cplus::lex::stream_source:

List of all members.

Public Member Functions
ptr< ucn_token >	read (void)
	Reads one token from file.
Static Public Member Functions
static ptr< stream_source >	create (const ptr< istream_wrapper > &a_wrapper)
	Returns new file source, initializes with input stream.
Protected Member Functions
	stream_source (const ptr< istream_wrapper > &a_wrapper)
	Creates new object, initializes with input stream.
virtual void	gc_mark (void)
	Marks the object.
Private Member Functions
	stream_source (const stream_source &)
	Hides copy constructor.
stream_source &	operator= (const stream_source &)
	Hides assignment operator.
Private Attributes
srp< istream_wrapper >	wrapper
	Stream to read from.
::std::istream *	stream
	Direct reference to the stream.

---

Detailed Description

Stream data source.

Represents data source reading from stream.

Definition at line 59 of file stream_source.hh.

---

Constructor & Destructor Documentation

lestes::lang::cplus::lex::stream_source::stream_source

(

const ptr< istream_wrapper > &

a_wrapper

)

[protected]

Creates new object, initializes with input stream.

Creates the object, initializes with wrapper.

Parameters:

a_wrapper

The stream wrapper.

Definition at line 51 of file stream_source.cc.

Referenced by create().

                                                                 :
        wrapper(checked(a_wrapper)),
        stream(wrapper->stream_get())
{
}

lestes::lang::cplus::lex::stream_source::stream_source

(

const stream_source &

)

[private]

Hides copy constructor.

---

Member Function Documentation

ptr< ucn_token > lestes::lang::cplus::lex::stream_source::read

(

void

)

[virtual]

Reads one token from file.

Reads next token from stream.

Returns:

The next token.

Implements lestes::lang::cplus::lex::ucn_filter.

Definition at line 61 of file stream_source.cc.

References lestes::lang::cplus::lex::ucn_token::create(), stream, lestes::lang::cplus::lex::ucn_token::TOK_EOF, and lestes::lang::cplus::lex::ucn_token::TOK_NOT_EOF.

{
        ptr<ucn_token> t;
        int c;

        if ((c = stream->get()) == EOF) {
                // TODO pt not necessary to set value, but looks better when debugging
                t = ucn_token::create(ucn_token::TOK_EOF,character::create_external(0));
        } else {
                // note that the meaning of real types is not clear at this stage
                t = ucn_token::create(ucn_token::TOK_NOT_EOF,character::create_external(static_cast<ulint>(c)));
        }
  
        return t;
}

ptr< stream_source > lestes::lang::cplus::lex::stream_source::create

(

const ptr< istream_wrapper > &

a_wrapper

)

[static]

Returns new file source, initializes with input stream.

Returns new instance, initializes with stream and file info.

Parameters:

a_wrapper

The stream wrapper.

Returns:

The new instance.

Definition at line 91 of file stream_source.cc.

References stream_source().

Referenced by lestes::lang::cplus::lex::evaluator::push_stream().

{
        return new stream_source(a_wrapper);
}

void lestes::lang::cplus::lex::stream_source::gc_mark

(

void

)

[protected, virtual]

Marks the object.

Marks the object.

Reimplemented from lestes::lang::cplus::lex::ucn_filter.

Definition at line 80 of file stream_source.cc.

References lestes::lang::cplus::lex::ucn_filter::gc_mark(), and wrapper.

{
        wrapper.gc_mark();
        data_source::gc_mark();
}

stream_source& lestes::lang::cplus::lex::stream_source::operator=

(

const stream_source &

)

[private]

Hides assignment operator.

---

Member Data Documentation

srp<istream_wrapper> lestes::lang::cplus::lex::stream_source::wrapper [private]

Stream to read from.

Definition at line 76 of file stream_source.hh.

Referenced by gc_mark().

::std::istream* lestes::lang::cplus::lex::stream_source::stream [private]

Direct reference to the stream.

Definition at line 78 of file stream_source.hh.

Referenced by read().

---

The documentation for this class was generated from the following files:

• stream_source.hh
• stream_source.cc

---