diff --git a/lib/include/artichoke/Util/Strings.hpp b/lib/include/artichoke/Util/Strings.hpp
index 748096a..e011a69 100644
--- a/lib/include/artichoke/Util/Strings.hpp
+++ b/lib/include/artichoke/Util/Strings.hpp
@@ -27,7 +27,7 @@ namespace arti::lang {
   }
 
   static inline constexpr bool isIdentChar(char c) {
-    return isLetter(c) || c == '_';
+    return isLetter(c) || c == '_' || isDigit(c);
   }
 
   static inline constexpr bool isHexChar(char c) {
diff --git a/lib/src/Tokenizer/Token.cpp b/lib/src/Tokenizer/Token.cpp
index 9718b57..78052af 100644
--- a/lib/src/Tokenizer/Token.cpp
+++ b/lib/src/Tokenizer/Token.cpp
@@ -8,189 +8,76 @@ namespace arti::lang {
   std::string toString(const Token &value) {
     using enum TokenV;
 
+    std::string_view tokenStr;
+
     switch (value.value) {
-      case tkEOF:
-        return std::format("Token{{ {} }}", "tkEOF", value.strValue);
-      case tkString:
-        return std::format("Token{{ {}, {} }}", "tkString", value.strValue);
-      case tkDecimal:
-        return std::format(
-          "Token{{ {}, {} }}",
-          "tkDecimal",
-          value.strValue
-        );
-      case tkInteger:
-        return std::format(
-          "Token{{ {}, {} }}",
-          "tkInteger",
-          value.strValue
-        );
-      case tkCharacter:
-        return std::format(
-          "Token{{ {}, {} }}",
-          "tkCharacter",
-          value.strValue
-        );
-      case tkIdentifier:
-        return std::format(
-          "Token{{ {}, {} }}",
-          "tkIdentifier",
-          value.strValue
-        );
-      case opDot:
-        return std::format("Token{{ {}, {} }}", "opDot", value.strValue);
-      case opMod:
-        return std::format("Token{{ {}, {} }}", "opMod", value.strValue);
-      case opPlus:
-        return std::format("Token{{ {}, {} }}", "opPlus", value.strValue);
-      case opHyphen:
-        return std::format("Token{{ {}, {} }}", "opHyphen", value.strValue);
-      case opSlash:
-        return std::format("Token{{ {}, {} }}", "opSlash", value.strValue);
-      case opBang:
-        return std::format("Token{{ {}, {} }}", "opBang", value.strValue);
-      case opStar:
-        return std::format("Token{{ {}, {} }}", "opStar", value.strValue);
-      case opColon:
-        return std::format("Token{{ {}, {} }}", "opColon", value.strValue);
-      case opComma:
-        return std::format("Token{{ {}, {} }}", "opComma", value.strValue);
-      case opAssign:
-        return std::format("Token{{ {}, {} }}", "opAssign", value.strValue);
-      case opAccess:
-        return std::format("Token{{ {}, {} }}", "opAccess", value.strValue);
-      case opSemicolon:
-        return std::format(
-          "Token{{ {}, {} }}",
-          "opSemicolon",
-          value.strValue
-        );
-      case opCaret:
-        return std::format("Token{{ {}, {} }}", "opCaret", value.strValue);
-      case opTilde:
-        return std::format("Token{{ {}, {} }}", "opTilde", value.strValue);
-      case opEq:
-        return std::format("Token{{ {}, {} }}", "opEq", value.strValue);
-      case opNeq:
-        return std::format("Token{{ {}, {} }}", "opNeq", value.strValue);
-      case opLt:
-        return std::format("Token{{ {}, {} }}", "opLt", value.strValue);
-      case opGt:
-        return std::format("Token{{ {}, {} }}", "opGt", value.strValue);
-      case opLtEq:
-        return std::format("Token{{ {}, {} }}", "opLtEq", value.strValue);
-      case opGtEq:
-        return std::format("Token{{ {}, {} }}", "opGtEq", value.strValue);
-      case opLShift:
-        return std::format("Token{{ {}, {} }}", "opLShift", value.strValue);
-      case opRShift:
-        return std::format("Token{{ {}, {} }}", "opRShift", value.strValue);
-      case opBoolAnd:
-        return std::format(
-          "Token{{ {}, {} }}",
-          "opBoolAnd",
-          value.strValue
-        );
-      case opBoolOr:
-        return std::format("Token{{ {}, {} }}", "opBoolOr", value.strValue);
-      case opAnd:
-        return std::format("Token{{ {}, {} }}", "opAnd", value.strValue);
-      case opOr:
-        return std::format("Token{{ {}, {} }}", "opOr", value.strValue);
-      case opLParen:
-        return std::format("Token{{ {}, {} }}", "opLParen", value.strValue);
-      case opRParen:
-        return std::format("Token{{ {}, {} }}", "opRParen", value.strValue);
-      case opLBracket:
-        return std::format(
-          "Token{{ {}, {} }}",
-          "opLBracket",
-          value.strValue
-        );
-      case opRBracket:
-        return std::format(
-          "Token{{ {}, {} }}",
-          "opRBracket",
-          value.strValue
-        );
-      case opLSquirly:
-        return std::format(
-          "Token{{ {}, {} }}",
-          "opLSquirly",
-          value.strValue
-        );
-      case opRSquirly:
-        return std::format(
-          "Token{{ {}, {} }}",
-          "opRSquirly",
-          value.strValue
-        );
-      case opArrow:
-        return std::format("Token{{ {}, {} }}", "opArrow", value.strValue);
-      case kwOr:
-        return std::format("Token{{ {}, {} }}", "kwOr", value.strValue);
-      case kwNot:
-        return std::format("Token{{ {}, {} }}", "kwNot", value.strValue);
-      case kwAnd:
-        return std::format("Token{{ {}, {} }}", "kwAnd", value.strValue);
-      case kwIf:
-        return std::format("Token{{ {}, {} }}", "kwIf", value.strValue);
-      case kwElse:
-        return std::format("Token{{ {}, {} }}", "kwElse", value.strValue);
-      case kwFn:
-        return std::format("Token{{ {}, {} }}", "kwFn", value.strValue);
-      case kwEnum:
-        return std::format("Token{{ {}, {} }}", "kwEnum", value.strValue);
-      case kwStruct:
-        return std::format("Token{{ {}, {} }}", "kwStruct", value.strValue);
-      case kwVariant:
-        return std::format(
-          "Token{{ {}, {} }}",
-          "kwVariant",
-          value.strValue
-        );
-      case kwDef:
-        return std::format("Token{{ {}, {} }}", "kwDef", value.strValue);
-      case kwLet:
-        return std::format("Token{{ {}, {} }}", "kwLet", value.strValue);
-      case kwMut:
-        return std::format("Token{{ {}, {} }}", "kwMut", value.strValue);
-      case kwFor:
-        return std::format("Token{{ {}, {} }}", "kwFor", value.strValue);
-      case kwWhile:
-        return std::format("Token{{ {}, {} }}", "kwWhile", value.strValue);
-      case kwReturn:
-        return std::format("Token{{ {}, {} }}", "kwReturn", value.strValue);
-      case kwUnreachable:
-        return std::format(
-          "Token{{ {}, {} }}",
-          "kwUnreachable",
-          value.strValue
-        );
-      case kwDefer:
-        return std::format("Token{{ {}, {} }}", "kwDefer", value.strValue);
-      case kwErrDefer:
-        return std::format(
-          "Token{{ {}, {} }}",
-          "kwErrDefer",
-          value.strValue
-        );
-      case kwTrue:
-        return std::format("Token{{ {}, {} }}", "kwTrue", value.strValue);
-      case kwFalse:
-        return std::format("Token{{ {}, {} }}", "kwFalse", value.strValue);
-      case kwNull:
-        return std::format("Token{{ {}, {} }}", "kwNull", value.strValue);
-      case kwImport:
-        return std::format("Token{{ {}, {} }}", "kwImport", value.strValue);
-      case kwExport:
-        return std::format("Token{{ {}, {} }}", "kwExport", value.strValue);
-      case kwModule:
-        return std::format("Token{{ {}, {} }}", "kwModule", value.strValue);
-      default:
-        return "<Undefined>";
+      case tkEOF:         return "Token{{ tkEOF }}";
+      case tkString:      tokenStr = "tkString"; break;
+      case tkDecimal:     tokenStr = "tkDecimal"; break;
+      case tkInteger:     tokenStr = "tkInteger"; break;
+      case tkCharacter:   tokenStr = "tkCharacter"; break;
+      case tkIdentifier:  tokenStr = "tkIdentifier"; break;
+      case opDot:         tokenStr = "opDot"; break;
+      case opMod:         tokenStr = "opMod"; break;
+      case opPlus:        tokenStr = "opPlus"; break;
+      case opHyphen:      tokenStr = "opHyphen"; break;
+      case opSlash:       tokenStr = "opSlash"; break;
+      case opBang:        tokenStr = "opBang"; break;
+      case opStar:        tokenStr = "opStar"; break;
+      case opColon:       tokenStr = "opColon"; break;
+      case opComma:       tokenStr = "opComma"; break;
+      case opAssign:      tokenStr = "opAssign"; break;
+      case opAccess:      tokenStr = "opAccess"; break;
+      case opSemicolon:   tokenStr = "opSemicolon"; break;
+      case opCaret:       tokenStr = "opCaret"; break;
+      case opTilde:       tokenStr = "opTilde"; break;
+      case opEq:          tokenStr = "opEq"; break;
+      case opNeq:         tokenStr = "opNeq"; break;
+      case opLt:          tokenStr = "opLt"; break;
+      case opGt:          tokenStr = "opGt"; break;
+      case opLtEq:        tokenStr = "opLtEq"; break;
+      case opGtEq:        tokenStr = "opGtEq"; break;
+      case opLShift:      tokenStr = "opLShift"; break;
+      case opRShift:      tokenStr = "opRShift"; break;
+      case opBoolAnd:     tokenStr = "opBoolAnd"; break;
+      case opBoolOr:      tokenStr = "opBoolOr"; break;
+      case opAnd:         tokenStr = "opAnd"; break;
+      case opOr:          tokenStr = "opOr"; break;
+      case opLParen:      tokenStr = "opLParen"; break;
+      case opRParen:      tokenStr = "opRParen"; break;
+      case opLBracket:    tokenStr = "opLBracket"; break;
+      case opRBracket:    tokenStr = "opRBracket"; break;
+      case opLSquirly:    tokenStr = "opLSquirly"; break;
+      case opRSquirly:    tokenStr = "opRSquirly"; break;
+      case opArrow:       tokenStr = "opArrow"; break;
+      case kwOr:          tokenStr = "kwOr"; break;
+      case kwNot:         tokenStr = "kwNot"; break;
+      case kwAnd:         tokenStr = "kwAnd"; break;
+      case kwIf:          tokenStr = "kwIf"; break;
+      case kwElse:        tokenStr = "kwElse"; break;
+      case kwFn:          tokenStr = "kwFn"; break;
+      case kwEnum:        tokenStr = "kwEnum"; break;
+      case kwStruct:      tokenStr = "kwStruct"; break;
+      case kwVariant:     tokenStr = "kwVariant"; break;
+      case kwDef:         tokenStr = "kwDef"; break;
+      case kwLet:         tokenStr = "kwLet"; break;
+      case kwMut:         tokenStr = "kwMut"; break;
+      case kwFor:         tokenStr = "kwFor"; break;
+      case kwWhile:       tokenStr = "kwWhile"; break;
+      case kwReturn:      tokenStr = "kwReturn"; break;
+      case kwUnreachable: tokenStr = "kwUnreachable"; break;
+      case kwDefer:       tokenStr = "kwDefer"; break;
+      case kwErrDefer:    tokenStr = "kwErrDefer"; break;
+      case kwTrue:        tokenStr = "kwTrue"; break;
+      case kwFalse:       tokenStr = "kwFalse"; break;
+      case kwNull:        tokenStr = "kwNull"; break;
+      case kwImport:      tokenStr = "kwImport"; break;
+      case kwExport:      tokenStr = "kwExport"; break;
+      case kwModule:      tokenStr = "kwModule"; break;
+      default:            tokenStr = "<Undefined>"; break;
     }
 
-    std::unreachable();
+    return std::format("Token{{ {}, {} }}", tokenStr, value.strValue);
   }
+
 } // namespace arti::lang
diff --git a/lib/src/Tokenizer/Tokenizer.cpp b/lib/src/Tokenizer/Tokenizer.cpp
index 9c1dd47..f20a25f 100644
--- a/lib/src/Tokenizer/Tokenizer.cpp
+++ b/lib/src/Tokenizer/Tokenizer.cpp
@@ -430,7 +430,7 @@ namespace arti::lang {
       return langException<ExceptCode::ecInvalidLiteral>(
         line,
         column,
-        "end of string (\")",
+        "end of char literal (')",
         "EOF"
       );
     }
@@ -439,7 +439,7 @@ namespace arti::lang {
       return langException<ExceptCode::ecInvalidLiteral>(
         line,
         column,
-        "end of string (\")",
+        "end char literal (')",
         *iter
       );
     }
@@ -478,78 +478,76 @@ namespace arti::lang {
       { stIter, iter }
     };
 
-    std::string_view strToken{ stIter, iter };
-
-    if (strToken.compare("or") == 0) {
+    if (tok.strValue.compare("or") == 0) {
       tok.value = TokenV::kwOr;
     }
-    else if (strToken.compare("not") == 0) {
+    else if (tok.strValue.compare("not") == 0) {
       tok.value = TokenV::kwNot;
     }
-    else if (strToken.compare("and") == 0) {
+    else if (tok.strValue.compare("and") == 0) {
       tok.value = TokenV::kwAnd;
     }
-    else if (strToken.compare("if") == 0) {
+    else if (tok.strValue.compare("if") == 0) {
       tok.value = TokenV::kwIf;
     }
-    else if (strToken.compare("else") == 0) {
+    else if (tok.strValue.compare("else") == 0) {
       tok.value = TokenV::kwElse;
     }
-    else if (strToken.compare("fn") == 0) {
+    else if (tok.strValue.compare("fn") == 0) {
       tok.value = TokenV::kwFn;
     }
-    else if (strToken.compare("enum") == 0) {
+    else if (tok.strValue.compare("enum") == 0) {
       tok.value = TokenV::kwEnum;
     }
-    else if (strToken.compare("struct") == 0) {
+    else if (tok.strValue.compare("struct") == 0) {
       tok.value = TokenV::kwStruct;
     }
-    else if (strToken.compare("variant") == 0) {
+    else if (tok.strValue.compare("variant") == 0) {
       tok.value = TokenV::kwVariant;
     }
-    else if (strToken.compare("def") == 0) {
+    else if (tok.strValue.compare("def") == 0) {
       tok.value = TokenV::kwDef;
     }
-    else if (strToken.compare("let") == 0) {
+    else if (tok.strValue.compare("let") == 0) {
       tok.value = TokenV::kwLet;
     }
-    else if (strToken.compare("mut") == 0) {
+    else if (tok.strValue.compare("mut") == 0) {
       tok.value = TokenV::kwMut;
     }
-    else if (strToken.compare("for") == 0) {
+    else if (tok.strValue.compare("for") == 0) {
       tok.value = TokenV::kwFor;
     }
-    else if (strToken.compare("while") == 0) {
+    else if (tok.strValue.compare("while") == 0) {
       tok.value = TokenV::kwWhile;
     }
-    else if (strToken.compare("return") == 0) {
+    else if (tok.strValue.compare("return") == 0) {
       tok.value = TokenV::kwReturn;
     }
-    else if (strToken.compare("unreachable") == 0) {
+    else if (tok.strValue.compare("unreachable") == 0) {
       tok.value = TokenV::kwUnreachable;
     }
-    else if (strToken.compare("defer") == 0) {
+    else if (tok.strValue.compare("defer") == 0) {
       tok.value = TokenV::kwDefer;
     }
-    else if (strToken.compare("errdefer") == 0) {
+    else if (tok.strValue.compare("errdefer") == 0) {
       tok.value = TokenV::kwErrDefer;
     }
-    else if (strToken.compare("true") == 0) {
+    else if (tok.strValue.compare("true") == 0) {
       tok.value = TokenV::kwTrue;
     }
-    else if (strToken.compare("false") == 0) {
+    else if (tok.strValue.compare("false") == 0) {
       tok.value = TokenV::kwFalse;
     }
-    else if (strToken.compare("null") == 0) {
+    else if (tok.strValue.compare("null") == 0) {
       tok.value = TokenV::kwNull;
     }
-    else if (strToken.compare("import") == 0) {
+    else if (tok.strValue.compare("import") == 0) {
       tok.value = TokenV::kwImport;
     }
-    else if (strToken.compare("export") == 0) {
+    else if (tok.strValue.compare("export") == 0) {
       tok.value = TokenV::kwExport;
     }
-    else if (strToken.compare("module") == 0) {
+    else if (tok.strValue.compare("module") == 0) {
       tok.value = TokenV::kwModule;
     }
 
@@ -610,7 +608,7 @@ namespace arti::lang {
       tok.strValue = std::string_view{ stIter, iter };
     }
     else {
-      return langException<ExceptCode::ecInvalidCharacter>(
+      return langException<ExceptCode::ecInvalidToken>(
         line,
         column,
         tok.strValue