visitor.h

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#ifndef __VISITOR_H
#define __VISITOR_H
 
#include "ast.h"
 
 
/*
 * AST TRAVERSAL (VISITOR PATTERN)
 */
 
typedef struct NodeVisitor
{
    void *data;
 
    Destructor dtor;
 
    /*
     * Traversal routines; each of these is called at the appropriate time as
     * the visitor traverses the AST.
     */
 
    #ifndef SKIP_IN_DOXYGEN
    void (* previsit_default)     (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_default)     (struct NodeVisitor* visitor, ASTNode* node);
    void (* previsit_program)     (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_program)     (struct NodeVisitor* visitor, ASTNode* node);
    void (* previsit_vardecl)     (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_vardecl)     (struct NodeVisitor* visitor, ASTNode* node);
    void (* previsit_funcdecl)    (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_funcdecl)    (struct NodeVisitor* visitor, ASTNode* node);
    void (* previsit_block)       (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_block)       (struct NodeVisitor* visitor, ASTNode* node);
    void (* previsit_assignment)  (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_assignment)  (struct NodeVisitor* visitor, ASTNode* node);
    void (* previsit_conditional) (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_conditional) (struct NodeVisitor* visitor, ASTNode* node);
    void (* previsit_whileloop)   (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_whileloop)   (struct NodeVisitor* visitor, ASTNode* node);
    void (* previsit_return)      (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_return)      (struct NodeVisitor* visitor, ASTNode* node);
    void (* previsit_break)       (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_break)       (struct NodeVisitor* visitor, ASTNode* node);
    void (* previsit_continue)    (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_continue)    (struct NodeVisitor* visitor, ASTNode* node);
    void (* previsit_binaryop)    (struct NodeVisitor* visitor, ASTNode* node);
    void (*  invisit_binaryop)    (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_binaryop)    (struct NodeVisitor* visitor, ASTNode* node);
    void (* previsit_unaryop)     (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_unaryop)     (struct NodeVisitor* visitor, ASTNode* node);
    void (* previsit_location)    (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_location)    (struct NodeVisitor* visitor, ASTNode* node);
    void (* previsit_funccall)    (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_funccall)    (struct NodeVisitor* visitor, ASTNode* node);
    void (* previsit_literal)     (struct NodeVisitor* visitor, ASTNode* node);
    void (*postvisit_literal)     (struct NodeVisitor* visitor, ASTNode* node);
    #endif
 
} NodeVisitor;
 
NodeVisitor* NodeVisitor_new();
 
void NodeVisitor_traverse (NodeVisitor* visitor, ASTNode* node);
 
void NodeVisitor_traverse_and_free (NodeVisitor* visitor, ASTNode* node);
 
void NodeVisitor_free (NodeVisitor* visitor);
 
 
/*
 * VISITORS
 */
 
NodeVisitor* PrintVisitor_new (FILE* output);
 
NodeVisitor* GenerateASTGraph_new (FILE* output);
 
NodeVisitor* SetParentVisitor_new();
 
NodeVisitor* CalcDepthVisitor_new ();
 
#endif