char allow

• 0x09
• 0x11 to 0x13
• 0x20 to 0x23
• 0x25 to 0x3F
• 0x41 to 0x5F
• 0x61 to 0x7E

C Keyword

auto break case char const continue default do double else enum extern float for goto if inline (C99) int long register restrict (C99) return short signed sizeof static struct switch typedef union unsigned void volatile while

C Preprocessor Keyword

if elif else endif

ifdef ifndef define undef

include line error pragma

defined

AST

struct node {
    struct node *left;  # +0
    struct node *right; # +8
    int nodetype;       # +16
    void *value;        # +24
};
sizeof(struct node) = 32;

nodeType	type number	value
return	1	return code
int function	2	name of function