108 lines
1.9 KiB
C
108 lines
1.9 KiB
C
#ifndef AST_H
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#define AST_H
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#include "lexer.h"
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/*
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expression → literal | unary | binary | grouping ;
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literal → NUMBER | STRING | "true" | "false" | "nil" ;
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grouping → "(" expression ")" ;
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unary → ( "-" | "!" ) expression ;
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binary → expression operator expression ;
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operator → "==" | "!=" | "<" | "<=" | ">" | ">=" | "+" | "-" | "*" | "/" ;
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*/
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typedef enum {
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EXPR_ASSIGN,
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EXPR_BINARY,
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EXPR_CALL,
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EXPR_GET,
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EXPR_GROUPING,
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EXPR_LITERAL,
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EXPR_LOGICAL,
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EXPR_SET,
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EXPR_SUPER,
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EXPR_THIS,
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EXPR_UNARY,
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EXPR_VARIABLE,
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} expr_type_t;
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typedef enum {
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VAL_BOOL,
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VAL_NIL,
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VAL_NUMBER,
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VAL_STRING,
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} value_type_t;
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typedef struct {
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value_type_t type;
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union {
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int boolean;
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double number;
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char *string;
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} as;
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} value_t;
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typedef struct expr_t {
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expr_type_t type;
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int line;
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union {
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struct {
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token_t name;
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struct expr_t *value;
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} assign;
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struct {
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token_t operator;
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struct expr_t *left;
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struct expr_t *right;
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} binary;
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struct {
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struct expr_t *callee;
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token_t paren;
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struct expr_t **arguments;
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} call;
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struct {
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struct expr_t *object;
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token_t name;
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} get;
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struct {
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struct expr_t *expression;
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} grouping;
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struct {
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value_t value;
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} literal;
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struct {
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token_t operator;
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struct expr_t *left;
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struct expr_t *right;
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} logical;
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struct {
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struct expr_t *object;
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token_t name;
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struct expr_t *value;
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} set;
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struct {
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token_t keyword;
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token_t method;
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} super;
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struct {
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token_t keyword;
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} this;
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struct {
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token_t operator;
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struct expr_t *right;
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} unary;
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struct {
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token_t name;
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} variable;
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} as;
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} expr_t;
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expr_t *create_binary_expr(token_t *operator, expr_t *left, expr_t *right);
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expr_t *create_unary_expr(token_t *operator, expr_t *right);
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expr_t *create_literal_expr(token_t *token);
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expr_t *create_grouping_expr(expr_t *expression);
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expr_t *create_variable_expr(token_t *name);
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void print_ast(expr_t *expr);
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#endif
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