i'm not sure of what i acomplished here

1 files changed, 19 insertions, 2 deletions

diff --git a/src/main.c b/src/main.c
index 666f847..ba67715 100644
--- a/src/main.c
+++ b/src/main.c
@@ -8,9 +8,17 @@
 typedef enum {
 	TOK_PUNCT,
 	TOK_NUM,
+	TOK_WORD,
 	TOK_EOF,
 } TokenType;
 
+static const char * str_tok[] = {
+	[TOK_PUNCT] = "TOK_PUNCT",
+	[TOK_NUM] = "TOK_NUM",
+	[TOK_WORD] = "TOK_WORD",
+	[TOK_EOF] = "TOK_EOF",
+};
+
 typedef struct Token Token;
 struct Token {
 	TokenType type;
@@ -35,7 +43,7 @@ static void
 expect(const Token *tok, TokenType type)
 {
 	if (tok->type != type)
-		error("expected a %u", type);
+		error("expected a %s", str_tok[type]);
 }
 
 static bool
@@ -91,12 +99,20 @@ tokenize(char *p)
 			continue;
 		}
 
-		if (strchr("+-/*", *p) != NULL) {
+		if (strchr("+-/*()", *p) != NULL) {
 			cur = cur->next = new_token(TOK_PUNCT, p, p + 1);
 			p += 1;
 			continue;
 		}
 
+		if (isalpha(*p)) {
+			char *q = p;
+			while (isalnum(*p))
+				p += 1;
+			cur = cur->next = new_token(TOK_WORD, q, p);
+			continue;
+		}
+
 		error("invalid token");
 	}
 	cur->next = new_token(TOK_EOF, p, p);
@@ -126,6 +142,7 @@ main(int argc, char **argv)
 		case '-': punct = "SUB"; break;
 		case '*': punct = "MUL"; break;
 		case '/': punct = "DIV"; break;
+		default: break;
 		}
 		tok = tok->next;