home *** CD-ROM | disk | FTP | other *** search
- /*
- * syn.h
- *
- * $Id: syn.h,v 1.8 1994/08/29 20:16:14 parrt Exp parrt $
- * $Revision: 1.8 $
- *
- * This file includes definitions and macros associated with syntax diagrams
- *
- * 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 1.23
- * Terence Parr
- * Parr Research Corporation
- * with Purdue University and AHPCRC, University of Minnesota
- * 1989-1994
- */
-
- #define NumNodeTypes 4
- #define NumJuncTypes 9
-
- /* List the different node types */
- #define nJunction 1
- #define nRuleRef 2
- #define nToken 3
- #define nAction 4
-
- /* Different types of junctions */
- #define aSubBlk 1
- #define aOptBlk 2
- #define aLoopBlk 3
- #define EndBlk 4
- #define RuleBlk 5
- #define Generic 6 /* just a junction--no unusual characteristics */
- #define EndRule 7
- #define aPlusBlk 8
- #define aLoopBegin 9
-
- typedef int NodeType;
-
- #define TreeBlockAllocSize 500
- #define JunctionBlockAllocSize 200
- #define ActionBlockAllocSize 50
- #define RRefBlockAllocSize 100
- #define TokenBlockAllocSize 100
-
- /* note that 'right' is used by the tree node allocator as a ptr for linked list */
- typedef struct _tree {
- struct _tree *down, *right;
- int token;
- union {
- int rk; /* if token==EpToken, => how many more tokens req'd */
- struct _tree *tref; /* if token==TREE_REF */
- set sref; /* if token==SET */
- } v;
- #ifdef TREE_DEBUG
- int in_use;
- #endif
- } Tree;
-
- /* a predicate is defined to be a predicate action and a token tree with
- * context info (if used); later, this struct may include the
- * "hoisting distance" when we hoist past tokens.
- *
- * A tree is used to indicate && vs ||
- *
- * p
- * |
- * q--r
- *
- * indicates p && (q||r).
- */
- typedef struct _Predicate {
- struct _Predicate *down, *right; /* these have to be first */
- char *expr;
- Tree *tcontext; /* used if lookahead depth of > one is needed (tree) */
- set scontext[2];/* used if lookahead depth of one is needed (set) */
- /* scontext[0] is not used; only needed so genExprSets()
- routine works (it expects an array)
- */
- set completion; /* which lookahead depths are required to complete tcontext? */
- } Predicate;
-
- #define TokenString(_i) ((TokenInd!=NULL)?TokenStr[TokenInd[_i]]:TokenStr[_i])
- #define ExprString(_i) ((TokenInd!=NULL)?ExprStr[TokenInd[_i]]:ExprStr[_i])
-
-
- /* M e s s a g e P a s s i n g T o N o d e s */
-
- /*
- * assumes a 'Junction *r' exists. This macro calls a function with
- * the pointer to the node to operate on and a pointer to the rule
- * in which it is enclosed.
- */
- #define TRANS(p) {if ( (p)==NULL ) fatal("TRANS: NULL object"); \
- if ( (p)->ntype == nJunction ) (*(fpJTrans[((Junction *)(p))->jtype]))( p );\
- else (*(fpTrans[(p)->ntype]))( p );}
-
- #define PRINT(p) {if ( (p)==NULL ) fatal("PRINT: NULL object");\
- (*(fpPrint[(p)->ntype]))( p );}
-
- #define REACH(p,k,rk,a) {if ( (p)==NULL ) fatal("REACH: NULL object");\
- (a) = (*(fpReach[(p)->ntype]))( p, k, rk );}
-
- #define TRAV(p,k,rk,a) {if ( (p)==NULL ) fatal("TRAV: NULL object");\
- (a) = (*(fpTraverse[(p)->ntype]))( p, k, rk );}
-
- /* All syntax diagram nodes derive from Node -- superclass
- */
- #ifdef __cplusplus
- class Node {
- public:
- NodeType ntype;
- };
- #else
- typedef struct _node {
- NodeType ntype;
- } Node;
- #endif
-
- #ifdef __cplusplus
- class ActionNode : public Node {
- public:
- #else
- typedef struct _anode {
- NodeType ntype;
- #endif
- Node *next;
- char *action;
- int file; /* index in FileStr (name of file with action) */
- int line; /* line number that action occurs on */
- int is_predicate; /* true if action is a <<...>>? predicate action */
- int done; /* don't dump if action dumped (used for predicates) */
- int init_action; /* is this the 1st action of 1st prod of block? */
- char *pred_fail; /* what to do/print when predicate fails */
- #ifdef __cplusplus
- };
- #else
- } ActionNode;
- #endif
-
- #ifdef __cplusplus
- class TokNode : public Node {
- public:
- #else
- typedef struct _toknode {
- NodeType ntype;
- #endif
- Node *next;
- char *rname; /* name of rule it's in */
- int file; /* index in FileStr (name of file with rule) */
- int line; /* line number that token occurs on */
- int token;
- int astnode; /* leaf/root/excluded (used to build AST's) */
- unsigned char label;/* token label or expression ? */
- unsigned char remapped;
- /* used if token id's are forced to certain positions;
- * a function walks the tree reassigning token numbers */
- unsigned char upper_range;
- /* used only if Token is of type T1..T2; in this case,
- * use token..upper_range as the range; else
- * upper_range must be 0 */
- unsigned char wild_card;
- /* indicates that the token is the "." wild-card;
- * field token is ignored if wild_card is set
- */
- unsigned int elnum; /* element number within the alternative */
- struct _TCnode *tclass; /* token class if tokclass ref */
- set tset; /* set of tokens represented by meta token */
- unsigned char complement; /* complement the set? */
- #ifdef __cplusplus
- };
- #else
- } TokNode;
- #endif
-
- #ifdef __cplusplus
- class RuleRefNode : public Node {
- public:
- #else
- typedef struct _rrnode {
- NodeType ntype;
- #endif
- Node *next;
- char *rname; /* name of rule it's in */
- int file; /* index in FileStr (name of file with rule)
- it's in */
- int line; /* line number that rule ref occurs on */
- char *text; /* reference to which rule */
- char *parms; /* point to parameters of rule invocation
- (if present) */
- char *assign; /* point to left-hand-side of assignment
- (if any) */
- int linked; /* Has a FoLink already been established? */
- int astnode; /* excluded? (used to build AST's) */
- unsigned int elnum; /* element number within the alternative */
- #ifdef __cplusplus
- };
- #else
- } RuleRefNode;
- #endif
-
- #ifdef __cplusplus
- class Junction : public Node {
- public:
- #else
- typedef struct _junct {
- NodeType ntype;
- #endif
- char ignore; /* used by FIRST computation to ignore
- empty alt added for the (...)+ blks */
- char visited; /* used by recursive routines to avoid
- infinite recursion */
- char pvisited; /* used by print routines to avoid
- infinite recursion */
- char fvisited; /* used by FoLink() to avoid
- infinite recursion */
- char *lock; /* used by REACH to track infinite recursion */
- char *pred_lock; /* used by find_predicates to track infinite recursion */
- int altnum; /* used in subblocks. altnum==0 means not an
- alt of subrule */
- int jtype; /* annotation for code-gen/FIRST/FOLLOW.
- Junction type */
- #ifdef __cplusplus
- Junction *end; /* pointer to node with EndBlk in it
- if blk == a block type */
- #else
- struct _junct *end; /* pointer to node with EndBlk in it
- if blk == a block type */
- #endif
- Node *p1, *p2;
- char *rname; /* name of rule junction is in */
- int file; /* index in FileStr (name of file with rule)
- if blk == RuleBlk */
- int line; /* line number that rule occurs on */
- int halt; /* never move past a junction with halt==TRUE */
- char *pdecl; /* point to declaration of parameters on rule
- (if present) */
- char *parm; /* point to parameter of block invocation
- (if present) */
- int predparm; /* indicates that the 'parm' is a predicate
- * to be used in the while loop generated
- * for blocks */
- char *ret; /* point to return type of rule (if present) */
- char *erraction; /* point to error action (if present) */
- int blockid; /* if start of block, then this is a unique ID */
- set *fset; /* used for code generation */
- Tree *ftree; /* used for code generation */
- Predicate *predicate;/* predicate that can be used to disambiguate */
- char guess; /* true if (...)? block */
- char approx; /* limit block to use linear approx lookahead? */
- set tokrefs; /* if ith element of alt is tokref then i is member */
- set rulerefs; /* if ith element of alt is rule ref then i is member */
- #ifdef __cplusplus
- };
- #else
- } Junction;
- #endif
-
- typedef struct { Node *left, *right; } Graph;
-
-