lestes::lang::cplus::syn::prefixer Class Reference

#include <prefixer.hh>

List of all members.

Public Types
enum	mode_type { PREFIX_OFF, PREFIX_ON }
typedef ::lestes::lang::cplus::lex::preprocessor	preprocessor
Static Public Member Functions
static ptr< bison_token >	yylex ()
	handles user hints (prefixes): they are stored in the user_hint field of the returned token
static void	init (mode_type, ptr< preprocessor >)
static mode_type	mode_get ()
Static Protected Member Functions
static ptr< bison_token >	internal_yylex ()
	used internally to actually call the lex scanner
static bison_token::hint_type	prefix2hint (const ucn_string &)
	given ucn_string, returns corresponding hint; when the string is not a valid prefix, HINT_NONE is returned
Private Member Functions
	prefixer ()
	Do no allow instantiating this class.
	prefixer (const prefixer &)
	Hide copy-constructor.
Static Private Attributes
static mode_type	mode
static ptr< preprocessor >	pp

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Detailed Description

Definition at line 42 of file prefixer.hh.

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Member Typedef Documentation

typedef ::lestes::lang::cplus::lex::preprocessor lestes::lang::cplus::syn::prefixer::preprocessor

Definition at line 44 of file prefixer.hh.

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Member Enumeration Documentation

enum lestes::lang::cplus::syn::prefixer::mode_type

Enumerator:

PREFIX_OFF
PREFIX_ON

Definition at line 49 of file prefixer.hh.

                       {
                PREFIX_OFF,
                PREFIX_ON
        };

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Constructor & Destructor Documentation

lestes::lang::cplus::syn::prefixer::prefixer

(

)

[private]

Do no allow instantiating this class.

lestes::lang::cplus::syn::prefixer::prefixer

(

const prefixer &

)

[private]

Hide copy-constructor.

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Member Function Documentation

ptr< bison_token > lestes::lang::cplus::syn::prefixer::yylex

(

)

[static]

handles user hints (prefixes): they are stored in the user_hint field of the returned token

Definition at line 95 of file prefixer.cc.

References lestes::lang::cplus::syn::bison_token::HINT_BITFIELD, lestes::lang::cplus::syn::bison_token::HINT_CTOR, lestes::lang::cplus::syn::bison_token::HINT_NO_BITFIELD, lestes::lang::cplus::syn::bison_token::HINT_NO_CTOR, lestes::lang::cplus::syn::bison_token::HINT_NONE, internal_yylex(), llog, mode, prefix2hint(), PREFIX_OFF, TOK_COLON, TOK_IDENT, and TOK_LEFT_PAR.

{
        ptr<bison_token> tok1 = internal_yylex();
        // when we are off, do not bother examining the token
        if (mode == PREFIX_OFF)
                return tok1;
        bison_token::hint_type hint;
        ptr<bison_token> tok2;
        do {
                // the prefixes are always identifiers
                if (tok1->type_get() != bison_token::TOK_IDENT)
                        return tok1;
                hint = prefix2hint( tok1->value_get() );
                if (hint == bison_token::HINT_NONE)
                        return tok1;
                tok2 = internal_yylex();
                // if the following token is not an identifier
                //   (or left parenthesis or colon, where appropriate),
                //   ignore the hint completely, warn, and try again
                // also ignore two or more hints in a row
                if (hint == bison_token::HINT_CTOR ||
                                hint == bison_token::HINT_NO_CTOR) {
                        if (tok2->type_get() == bison_token::TOK_LEFT_PAR)
                                break;
                } else if (hint == bison_token::HINT_BITFIELD ||
                                hint == bison_token::HINT_NO_BITFIELD) {
                        if (tok2->type_get() == bison_token::TOK_COLON)
                                break;
                } else if (tok2->type_get() == bison_token::TOK_IDENT) {
                        if (prefix2hint(tok2->value_get()) == bison_token::HINT_NONE)
                                break;
                        else
                                ;       // hint before another hint
                }
                llog(prl) << "user-specified hint (\"" << tok1->value_get() <<
                        "\") irrelevant, discarding\n";
                tok1 = tok2;
        } while (true);
        // now we have the user hint (in hint) and the hinted token (in tok2)
        tok2->user_hint_set(hint);
        return tok2;
}

void lestes::lang::cplus::syn::prefixer::init	(	mode_type	,
		ptr< preprocessor >
	)			[static]

Definition at line 48 of file prefixer.cc.

References mode, and pp.

{
        mode = a_mode;
        pp = a_pp;
}

prefixer::mode_type lestes::lang::cplus::syn::prefixer::mode_get

(

)

[static]

Definition at line 54 of file prefixer.cc.

References mode.

{
        return mode;
}

ptr< bison_token > lestes::lang::cplus::syn::prefixer::internal_yylex

(

)

[static, protected]

used internally to actually call the lex scanner

Definition at line 59 of file prefixer.cc.

References lestes::intercode::intercode::create(), and pp.

Referenced by yylex().

{
        return bison_token::create( pp->read() );
}

bison_token::hint_type lestes::lang::cplus::syn::prefixer::prefix2hint

(

const ucn_string &

)

[static, protected]

given ucn_string, returns corresponding hint; when the string is not a valid prefix, HINT_NONE is returned

Definition at line 86 of file prefixer.cc.

References lestes::lang::cplus::syn::prefix2hint_map_item::hint, lestes::lang::cplus::syn::prefix2hint_map, and lestes::lang::cplus::syn::prefix2hint_map_item::value.

Referenced by yylex().

{
        const struct prefix2hint_map_item * it = prefix2hint_map;
        // try to match the strings, stop at the end of the array where the string is empty
        while (!(it->value.empty()) && str != it->value)
                ++it;
        return it->hint;
}

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Member Data Documentation

prefixer::mode_type lestes::lang::cplus::syn::prefixer::mode [static, private]

Definition at line 66 of file prefixer.hh.

Referenced by init(), mode_get(), and yylex().

ptr< prefixer::preprocessor > lestes::lang::cplus::syn::prefixer::pp [static, private]

Definition at line 67 of file prefixer.hh.

Referenced by init(), and internal_yylex().

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

• prefixer.hh
• prefixer.cc

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