kern: np: Add support for return statements

This commit introduces lexical, parsing and code generation support for
the return statements. As of now, one is only able to return unsigned integers
but this will be expanded upon in the future

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/sys/np/core/np_lex.c b/src/sys/np/core/np_lex.c
index 389f1e2..222feba 100644
--- a/src/sys/np/core/np_lex.c
+++ b/src/sys/np/core/np_lex.c
@@ -144,6 +144,11 @@ static int
 lex_cmptok(char *tokstr, struct lex_token *res)
 {
     switch (*tokstr) {
+    case 'r':
+        if (strcmp(tokstr, TOKEN_RETURN) == 0) {
+            res->token = TT_RETURN;
+        }
+        return 0;
     case 'b':
         if (strcmp(tokstr, TOKEN_BEGIN) == 0) {
             res->token = TT_BEGIN;