compilerbook-starter-code/expr.h at master · dthain/compilerbook-starter-code · GitHub

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#ifndef EXPR_H
#define EXPR_H

#include "symbol.h"

typedef enum {
	EXPR_ADD,
	EXPR_SUB,
	EXPR_MUL,
	EXPR_DIV
	/* many more kinds of exprs to add here */
} expr_t;

struct expr {
	/* used by all kinds of exprs */
	expr_t kind;
	struct expr *left;
	struct expr *right;

	/* used by various leaf exprs */
	const char *name;
	int literal_value;
	const char * string_literal;
	struct symbol *symbol;
};

struct expr * expr_create( expr_t kind, struct expr *left, struct expr *right );

struct expr * expr_create_name( const char *n );
struct expr * expr_create_integer_literal( int c );
struct expr * expr_create_boolean_literal( int c );
struct expr * expr_create_char_literal( char c );
struct expr * expr_create_string_literal( const char *str );

void expr_print( struct expr *e );

#endif