fix type-to-string conv. + fix binary type check + add modulo + rework import (now include)

core/lexer.go

@@ -29,6 +29,7 @@ const (
 	TokenMinus
 	TokenStar
 	TokenSlash
+	TokenPercent
 	TokenBang
 	TokenSemicolon
 
@@ -55,7 +56,7 @@ const (
 	TokenVar
 	TokenIf
 	TokenElse
-	TokenImport
+	TokenInclude
 	TokenType
 	TokenFor
 	TokenIn
@@ -166,8 +167,8 @@ func (t TokenKind) String() string {
 		return "open bracket"
 	case TokenCloseBracket:
 		return "close bracket"
-	case TokenImport:
-		return "import"
+	case TokenInclude:
+		return "include"
 	case TokenColon:
 		return "colon"
 	case TokenPipe:
@@ -195,7 +196,7 @@ var Keywords = map[string]TokenKind{
 	"nil":        TokenNil,
 	"if":         TokenIf,
 	"else":       TokenElse,
-	"import":     TokenImport,
+	"include":    TokenInclude,
 	"var":        TokenVar,
 	"fn":         TokenFunc,
 	"return":     TokenReturn,
@@ -268,6 +269,8 @@ func (l *Lexer) NextToken() (Token, error) {
 		}
 
 		return l.makeToken(TokenSlash), nil
+	case '%':
+		return l.makeToken(TokenPercent), nil
 	case '(':
 		return l.makeToken(TokenOpenParenthesis), nil
 	case ')':