PCCTSAST.h
资源名称:pccts133.zip [点击查看]
上传用户:itx_2006
上传日期:2007-01-06
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文件大小:4k
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- /* Abstract syntax tree
- *
- * SOFTWARE RIGHTS
- *
- * We reserve no LEGAL rights to the Purdue Compiler Construction Tool
- * Set (PCCTS) -- PCCTS is in the public domain. An individual or
- * company may do whatever they wish with source code distributed with
- * PCCTS or the code generated by PCCTS, including the incorporation of
- * PCCTS, or its output, into commerical software.
- *
- * We encourage users to develop software with PCCTS. However, we do ask
- * that credit is given to us for developing PCCTS. By "credit",
- * we mean that if you incorporate our source code into one of your
- * programs (commercial product, research project, or otherwise) that you
- * acknowledge this fact somewhere in the documentation, research report,
- * etc... If you like PCCTS and have developed a nice tool with the
- * output, please mention that you developed it using PCCTS. In
- * addition, we ask that this header remain intact in our source code.
- * As long as these guidelines are kept, we expect to continue enhancing
- * this system and expect to make other tools available as they are
- * completed.
- *
- * ANTLR 1.33
- * Terence Parr
- * Parr Research Corporation
- * with Purdue University and AHPCRC, University of Minnesota
- * 1989-1998
- */
- #ifndef PCCTSAST_H
- #define PCCTSAST_H
- #include "pcctscfg.h"
- #include PCCTS_STDIO_H
- #include PCCTS_STDLIB_H
- PCCTS_NAMESPACE_STD
- //class SList;
- #define StringScanMaxText 50
- #define MaxTreeStackDepth 400
- //
- // 7-Apr-97 133MR1 signed int not accepted by AT&T cfront
- //
- typedef struct stringlexer {
- int c; // MR1
- char *input;
- char *p;
- char text[StringScanMaxText];
- } StringLexer;
- /* Define the structures needed for ast_scan() */
- typedef struct stringparser {
- int token;
- StringLexer *lexer;
- int num_labels;
- } StringParser;
- typedef struct _scanast {
- struct _scanast *_right, *_down;
- int _token;
- int label_num;
- int type() { return _token; }
- struct _scanast *right() { return _right; }
- struct _scanast *down() { return _down; }
- } ScanAST;
- #define VALID_SCAN_TOKEN(t) (t>=__LPAREN && t<=__PERIOD)
- class DllExportPCCTS PCCTS_AST {
- protected:
- static char *scan_token_tbl[];
- enum {
- __LPAREN=1,
- __RPAREN=2,
- __PERCENT=3,
- __INT=4,
- __COLON=5,
- __POUND=6,
- __PERIOD=7,
- __StringScanEOF=-1};
- protected:
- char *scan_token_str(int t);
- void stringlexer_init(StringLexer *scanner, char *input);
- void stringparser_init(StringParser *, StringLexer *);
- ScanAST *stringparser_parse_scanast(char *templ, int *n);
- ScanAST *stringparser_parse_tree(StringParser *parser);
- ScanAST *stringparser_parse_element(StringParser *parser);
- void stringscan_advance(StringLexer *scanner);
- int stringscan_gettok(StringLexer *scanner);
- void _push(PCCTS_AST **st, int *sp, PCCTS_AST *e);
- PCCTS_AST *_pop(PCCTS_AST **st, int *sp);
- int match_partial(PCCTS_AST *t, PCCTS_AST *u);
- int scanmatch(ScanAST *t, PCCTS_AST **labels[], int *n);
- void scanast_free(ScanAST *t);
- ScanAST *new_scanast(int tok);
- void stringparser_match(StringParser *parser, int type);
- virtual PCCTS_AST *deepCopyBushy();
- public:
- PCCTS_AST() {;}
- virtual ~PCCTS_AST() {;}
- /* This group must be defined for SORCERER to work correctly */
- virtual PCCTS_AST *right() = 0;
- virtual PCCTS_AST *down() = 0;
- virtual void setRight(PCCTS_AST *t) = 0;
- virtual void setDown(PCCTS_AST *t) = 0;
- // we define these so ANTLR doesn't have to
- virtual int type() { return 0; }
- virtual void setType(int t) {;}
- virtual PCCTS_AST *shallowCopy() {panic("no shallowCopy() defined"); return NULL;}
- /* These are not needed by ANTLR, but are support functions */
- virtual PCCTS_AST *deepCopy(); // used by SORCERER in transform mode
- virtual void addChild(PCCTS_AST *t);
- virtual void lisp_action(FILE *f) {;}
- virtual void lisp(FILE *f);
- static PCCTS_AST *make(PCCTS_AST *rt, ...);
- virtual PCCTS_AST *ast_find_all(PCCTS_AST *u, PCCTS_AST **cursor);
- virtual int match(PCCTS_AST *u);
- virtual void insert_after(PCCTS_AST *b);
- virtual void append(PCCTS_AST *b);
- virtual PCCTS_AST *tail();
- virtual PCCTS_AST *bottom();
- static PCCTS_AST *cut_between(PCCTS_AST *a, PCCTS_AST *b);
- // virtual SList *to_slist();
- virtual void tfree();
- int ast_scan(char *templ, ...);
- virtual int nsiblings();
- virtual PCCTS_AST *sibling_index(int i);
- void require(int e,char *err){ if ( !e ) panic(err); }
- virtual void panic(char *err)
- { fprintf(stderr, "PCCTS_AST: %sn", err); exit(PCCTS_EXIT_FAILURE); }
- };
- #endif /* PCCTSAST_H */