[lexer.h] Adding function to skip whitespace

src/lexer.h

@@ -19,6 +19,7 @@ void lexer_read_char(struct lexer *l);
 struct token lexer_next_token(struct lexer *l);
 struct str lexer_read_ident(struct lexer *l);
 enum token_type_enum lexer_lookup_ident(struct str ident);
+void lexer_skip_whitespace(struct lexer *l);
 
 bool _lexer_is_letter(char c);
 
@@ -50,6 +51,8 @@ lexer_next_token(struct lexer *l)
 {
 	struct token t = TOKEN_ILLEGAL;
 
+	lexer_skip_whitespace(l);
+
 	switch ( l->c ) {
 	case '=':  t = token_create(TT_ASSIGN,    str_from_cstr("=", 1)); break;
 	case ';':  t = token_create(TT_SEMICOLON, str_from_cstr(";", 1)); break;
@@ -126,6 +129,22 @@ lexer_lookup_ident(struct str ident)
 	return TT_IDENT;
 }
 
+void 
+lexer_skip_whitespace(struct lexer *l)
+{
+loop:
+	switch ( l->c ) {
+	case ' ':
+	case '\t':
+	case '\r':
+	case '\n':
+		lexer_read_char(l);
+		goto loop;
+	}
+
+	return;
+}
+
 bool
 _lexer_is_letter(char c)
 {