File: tokens.h

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/* Compiler implementation of the D programming language
 * Copyright (C) 1999-2018 by The D Language Foundation, All Rights Reserved
 * written by Walter Bright
 * http://www.digitalmars.com
 * Distributed under the Boost Software License, Version 1.0.
 * http://www.boost.org/LICENSE_1_0.txt
 * https://github.com/dlang/dmd/blob/master/src/tokens.h
 */

#ifndef DMD_TOKENS_H
#define DMD_TOKENS_H

#ifdef __DMC__
#pragma once
#endif /* __DMC__ */

#include "port.h"
#include "mars.h"

class Identifier;

/* Tokens:
        (       )
        [       ]
        {       }
        <       >       <=      >=      ==      !=      ===     !==
        <<      >>      <<=     >>=     >>>     >>>=
        +       -       +=      -=
        *       /       %       *=      /=      %=
        &       |       ^       &=      |=      ^=
        =       !       ~       @
        ^^      ^^=
        ++      --
        .       ->      :       ,       =>
        ?       &&      ||
 */

enum TOK
{
        TOKreserved,

        // Other
        TOKlparen,      TOKrparen,
        TOKlbracket,    TOKrbracket,
        TOKlcurly,      TOKrcurly,
        TOKcolon,       TOKneg,
        TOKsemicolon,   TOKdotdotdot,
        TOKeof,         TOKcast,
        TOKnull,        TOKassert,
        TOKtrue,        TOKfalse,
        TOKarray,       TOKcall,
        TOKaddress,
        TOKtype,        TOKthrow,
        TOKnew,         TOKdelete,
        TOKstar,        TOKsymoff,
        TOKvar,         TOKdotvar,
        TOKdotid,       TOKdotti,
        TOKdottype,     TOKslice,
        TOKarraylength, TOKversion,
        TOKmodule,      TOKdollar,
        TOKtemplate,    TOKdottd,
        TOKdeclaration, TOKtypeof,
        TOKpragma,      TOKdsymbol,
        TOKtypeid,      TOKuadd,
        TOKremove,
        TOKnewanonclass, TOKcomment,
        TOKarrayliteral, TOKassocarrayliteral,
        TOKstructliteral,
        TOKclassreference,
        TOKthrownexception,
        TOKdelegateptr,
        TOKdelegatefuncptr,

// 54
        // Operators
        TOKlt,          TOKgt,
        TOKle,          TOKge,
        TOKequal,       TOKnotequal,
        TOKidentity,    TOKnotidentity,
        TOKindex,       TOKis,

// 64
        TOKshl,         TOKshr,
        TOKshlass,      TOKshrass,
        TOKushr,        TOKushrass,
        TOKcat,         TOKcatass,      TOKcatelemass,  TOKcatdcharass,     // ~ ~=
        TOKadd,         TOKmin,         TOKaddass,      TOKminass,
        TOKmul,         TOKdiv,         TOKmod,
        TOKmulass,      TOKdivass,      TOKmodass,
        TOKand,         TOKor,          TOKxor,
        TOKandass,      TOKorass,       TOKxorass,
        TOKassign,      TOKnot,         TOKtilde,
        TOKplusplus,    TOKminusminus,  TOKconstruct,   TOKblit,
        TOKdot,         TOKarrow,       TOKcomma,
        TOKquestion,    TOKandand,      TOKoror,
        TOKpreplusplus, TOKpreminusminus,

// 105
        // Numeric literals
        TOKint32v, TOKuns32v,
        TOKint64v, TOKuns64v,
        TOKint128v, TOKuns128v,
        TOKfloat32v, TOKfloat64v, TOKfloat80v,
        TOKimaginary32v, TOKimaginary64v, TOKimaginary80v,

        // Char constants
        TOKcharv, TOKwcharv, TOKdcharv,

        // Leaf operators
        TOKidentifier,  TOKstring, TOKxstring,
        TOKthis,        TOKsuper,
        TOKhalt,        TOKtuple,
        TOKerror,

        // Basic types
        TOKvoid,
        TOKint8, TOKuns8,
        TOKint16, TOKuns16,
        TOKint32, TOKuns32,
        TOKint64, TOKuns64,
        TOKint128, TOKuns128,
        TOKfloat32, TOKfloat64, TOKfloat80,
        TOKimaginary32, TOKimaginary64, TOKimaginary80,
        TOKcomplex32, TOKcomplex64, TOKcomplex80,
        TOKchar, TOKwchar, TOKdchar, TOKbool,

// 152
        // Aggregates
        TOKstruct, TOKclass, TOKinterface, TOKunion, TOKenum, TOKimport,
        TOKalias, TOKoverride, TOKdelegate, TOKfunction,
        TOKmixin,

        TOKalign, TOKextern, TOKprivate, TOKprotected, TOKpublic, TOKexport,
        TOKstatic, TOKfinal, TOKconst, TOKabstract,
        TOKdebug, TOKdeprecated, TOKin, TOKout, TOKinout, TOKlazy,
        TOKauto, TOKpackage, TOKmanifest, TOKimmutable,

// 183
        // Statements
        TOKif, TOKelse, TOKwhile, TOKfor, TOKdo, TOKswitch,
        TOKcase, TOKdefault, TOKbreak, TOKcontinue, TOKwith,
        TOKsynchronized, TOKreturn, TOKgoto, TOKtry, TOKcatch, TOKfinally,
        TOKasm, TOKforeach, TOKforeach_reverse,
        TOKscope,
        TOKon_scope_exit, TOKon_scope_failure, TOKon_scope_success,

// 207
        // Contracts
        TOKinvariant,

        // Testing
        TOKunittest,

        // Added after 1.0
        TOKargTypes,
        TOKref,
        TOKmacro,

// 212
        TOKparameters,
        TOKtraits,
        TOKoverloadset,
        TOKpure,
        TOKnothrow,
        TOKgshared,
        TOKline,
        TOKfile,
        TOKfilefullpath,
        TOKmodulestring,
        TOKfuncstring,
        TOKprettyfunc,
        TOKshared,
        TOKat,
        TOKpow,
        TOKpowass,
        TOKgoesto,
        TOKvector,
        TOKpound,

// 231
        TOKinterval,
        TOKvoidexp,
        TOKcantexp,
        TOKshowctfecontext,

        TOKobjc_class_reference,

        TOKMAX
};

#define TOKwild TOKinout

struct Token
{
    Token *next;
    Loc loc;
    const utf8_t *ptr;         // pointer to first character of this token within buffer
    TOK value;
    const utf8_t *blockComment; // doc comment string prior to this token
    const utf8_t *lineComment;  // doc comment for previous token
    union
    {
        // Integers
        sinteger_t intvalue;
        uinteger_t unsvalue;

        // Floats
        real_t floatvalue;

        struct
        {   utf8_t *ustring;     // UTF8 string
            unsigned len;
            unsigned char postfix;      // 'c', 'w', 'd'
        };

        Identifier *ident;
    };

    static const char *tochars[TOKMAX];

    static Token *freelist;
    static Token *alloc();
    void free();

    Token() : next(NULL) {}
    int isKeyword();
#ifdef DEBUG
    void print();
#endif
    const char *toChars() const;
    static const char *toChars(TOK);
};

#endif /* DMD_TOKENS_H */