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/*
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Crown Copyright (c) 1997, 1998
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This TenDRA(r) Computer Program is subject to Copyright
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owned by the United Kingdom Secretary of State for Defence
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acting through the Defence Evaluation and Research Agency
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(DERA). It is made available to Recipients with a
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royalty-free licence for its use, reproduction, transfer
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to other parties and amendment for any purpose not excluding
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product development provided that any such use et cetera
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shall be deemed to be acceptance of the following conditions:-
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(1) Its Recipients shall ensure that this Notice is
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reproduced upon any copies or amended versions of it;
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(2) Any amended version of it shall be clearly marked to
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show both the nature of and the organisation responsible
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for the relevant amendment or amendments;
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(3) Its onward transfer from a recipient to another
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party shall be deemed to be that party's acceptance of
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these conditions;
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(4) DERA gives no warranty or assurance as to its
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quality or suitability for any purpose and DERA accepts
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no liability whatsoever in relation to any use to which
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it may be put.
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*/
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#ifndef PARSE_INCLUDED
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#define PARSE_INCLUDED
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/*
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TYPE REPRESENTING A PARSER STATE
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This type is used to represent the information to be saved before the
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separate compilation of any saved preprocessing tokens and restored
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afterwards.
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*/
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typedef struct pstate_tag {
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LOCATION loc ;
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OPTIONS *opts ;
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int flag [10] ;
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DECL_SPEC dspec [2] ;
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NAMESPACE nspace [2] ;
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STACK ( NAMESPACE ) nstack [3] ;
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} PARSE_STATE ;
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/*
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TOKEN EXPANSION STATES
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These values are used as arguments to expand_token to indicate the
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current parsing state.
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*/
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#define EXPAND_NORMAL 0
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#define EXPAND_AHEAD 1
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#define EXPAND_RESCAN 2
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#define EXPAND_TEMPLATE 3
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#define EXPAND_IDENTIFIER 4
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#define EXPAND_COLON_COLON 5
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#define EXPAND_CHECK_COLON 6
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#define EXPAND_DESTRUCTOR 7
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#define EXPAND_STRING 8
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/*
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TOKEN PARSER DECLARATIONS
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The routines in this module are concerned with reading the next lexical
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token from the input file. They include expand_token which is the top
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level lexical analysis and preprocessing routine.
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*/
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extern void init_parser PROTO_S ( ( PPTOKEN * ) ) ;
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extern int expand_token PROTO_S ( ( int ) ) ;
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extern int expand_preproc PROTO_S ( ( int ) ) ;
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extern void rescan_template PROTO_S ( ( NAMESPACE ) ) ;
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extern PPTOKEN *patch_tokens PROTO_S ( ( int ) ) ;
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extern PPTOKEN *restore_parser PROTO_S ( ( void ) ) ;
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extern PPTOKEN *read_loc_tokens PROTO_S ( ( PPTOKEN * ) ) ;
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extern void snip_tokens PROTO_S ( ( PPTOKEN *, PPTOKEN * ) ) ;
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extern void save_state PROTO_S ( ( PARSE_STATE *, int ) ) ;
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extern void restore_state PROTO_S ( ( PARSE_STATE * ) ) ;
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extern int crt_state_depth ;
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/*
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CURRENT TOKEN INFORMATION
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These variables are used to store information about the current lexical
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token as read by expand_token. crt_lex_token gives the current token
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number, with any additional information being stored in crt_token.
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last_lex_token gives the previous value of crt_lex_token. Finally
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saved_lex_token is used as a temporary store in exception handling.
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*/
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extern PPTOKEN *crt_token ;
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extern NAMESPACE crt_lookup ;
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extern int crt_lex_token ;
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extern int saved_lex_token ;
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extern int last_lex_token ;
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extern int have_syntax_error ;
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/*
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PARSER MACROS
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These macros are used by the SID parser to access the output of the
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lexical analysis and preprocessing routines. CURRENT_TERMINAL gives
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the value of the current lexical token. ADVANCE_LEXER reads the next
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lexical token. RESCAN_LEXER rescans the current token. SAVE_LEXER
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and RESTORE_LEXER are used in exception handling.
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*/
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#define CURRENT_TERMINAL crt_lex_token
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#define RESTORE_LEXER crt_lex_token = saved_lex_token ;
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#define next_token() expand_token ( EXPAND_AHEAD )
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#define RESCAN_LEXER crt_lex_token = expand_token ( EXPAND_RESCAN )
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#define ADVANCE_LEXER\
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{\
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last_lex_token = crt_lex_token ;\
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crt_lex_token = expand_token ( EXPAND_NORMAL ) ;\
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}
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#define SAVE_LEXER( T )\
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{\
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saved_lex_token = crt_lex_token ;\
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crt_lex_token = ( T ) ;\
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}
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#endif
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