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#ifndef PARSER_H
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#define PARSER_H
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/* ast_expr_t */
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typedef enum {
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EXPR_STRING,
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EXPR_BINARY,
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EXPR_INTEGER,
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} ast_expr_type_t;
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typedef struct ast_expr {
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ast_expr_type_t type;
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union {
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char *string;
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struct {
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char op;
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struct ast_expr *a;
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struct ast_expr *b;
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} binary;
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int integer;
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};
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struct ast_expr *next;
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char nexttype;
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} ast_expr_t;
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ast_expr_t *ast_string_alloc(char const *value);
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ast_expr_t *ast_binary_alloc(char op, ast_expr_t *a, ast_expr_t *b);
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ast_expr_t *ast_integer_alloc(int i);
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void ast_expr_pp(ast_expr_t *expr);
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void ast_expr_free(ast_expr_t *expr);
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void ast_expr_free_list(ast_expr_t *expr);
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/* ast_comment_t */
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typedef struct {
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char *value;
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int is_rem;
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} ast_comment_t;
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ast_comment_t *ast_comment_alloc(char const *value, int is_rem);
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void ast_comment_free(ast_comment_t *comment);
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/* ast_token_t */
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typedef struct {
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char *value;
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} ast_token_t;
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ast_token_t *ast_token_alloc(char const *value);
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void ast_token_free(ast_token_t *token);
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/* ast_stmt_t */
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typedef enum {
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STMT_CALL,
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STMT_COMMENT,
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} ast_stmt_type_t;
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typedef struct ast_stmt {
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ast_stmt_type_t type;
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union {
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struct {
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ast_token_t *target;
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ast_expr_t *args;
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} call;
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ast_comment_t *comment;
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};
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struct ast_stmt *next;
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} ast_stmt_t;
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ast_stmt_t *ast_stmt_alloc(ast_stmt_type_t type);
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void ast_stmt_pp(ast_stmt_t *stmt);
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void ast_stmt_free(ast_stmt_t *stmt);
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void ast_stmt_free_list(ast_stmt_t *stmt);
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/* ast_t */
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typedef struct {
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ast_stmt_t *stmts;
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} ast_t;
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ast_t *ast_alloc(void);
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void ast_append_stmt(ast_t *ast, ast_stmt_t *stmt);
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void ast_pp(ast_t *ast);
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void ast_free(ast_t *ast);
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/* flex/bison */
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int yylex(void);
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int yyparse(ast_t *ast);
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int yywrap(void);
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void yyerror(ast_t *ast, char const *s);
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int parser_test(void);
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/* from lang.l */
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void begin_scan(char const *s);
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void finish_scan();
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#endif
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/* vim: set sw=4 et: */
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