[DAPHNE-#773] Undetected invalid script args

- Fixed invalid script arguments that try to evaulate an expression
- Fixed invalid script arguments that were not literals
- Added testcases for single script arguments
- Added testcases where Daphne fails in case of an invalid script arguments

Author: ldirry

src/parser/daphnedsl/DaphneDSLVisitor.cpp

@@ -794,27 +794,41 @@ antlrcpp::Any DaphneDSLVisitor::visitArgExpr(DaphneDSLGrammarParser::ArgExprCont
             "argument " + arg + " referenced, but not provided as a command line argument"
         );
 
-    bool hasMinus;
-    std::string litStr;
-    if(!it->second.empty() && it->second[0] == '-') {
+    std::string argValue = it->second;
+    bool hasMinus = false;
+    if (!argValue.empty() && argValue[0] == '-') {
         hasMinus = true;
-        litStr = it->second.substr(1);
-    }
-    else {
-        hasMinus = false;
-        litStr = it->second;
+        argValue = argValue.substr(1);
     }
 
-    // Parse the string that was passed as the value for this argument on the
-    // command line as a DaphneDSL literal.
+    // Parse the argument value as a literal
     // TODO: fix for string literals when " are not escaped or not present
-    std::istringstream stream(litStr);
+    std::istringstream stream(argValue);
     antlr4::ANTLRInputStream input(stream);
-    input.name = "argument"; // TODO Does this make sense?
+    input.name = "argument";
     DaphneDSLGrammarLexer lexer(&input);
     antlr4::CommonTokenStream tokens(&lexer);
     DaphneDSLGrammarParser parser(&tokens);
-    DaphneDSLGrammarParser::LiteralContext * literalCtx = parser.literal();
+
+    CancelingErrorListener errorListener;
+    lexer.removeErrorListeners();
+    lexer.addErrorListener(&errorListener);
+    parser.removeErrorListeners();
+    parser.addErrorListener(&errorListener);
+
+    DaphneDSLGrammarParser::LiteralContext * literalCtx = nullptr;
+    try {
+        literalCtx = parser.literal();
+        if (tokens.LA(1) != antlr4::Token::EOF) {
+            // Ensure entire input is consumed; if not, it's not a valid literal
+            throw std::runtime_error("Extra input after literal");
+        }
+    }
+    catch (std::exception & e) {
+        throw ErrorHandler::compilerError(utils.getLoc(ctx->start), "DSLVisitor",
+            "Invalid literal value for argument '" + arg + "': " + argValue
+        );
+    }
 
     mlir::Value lit = visitLiteral(literalCtx);
     if(!hasMinus)

test/api/cli/scriptargs/ScriptArgsTest.cpp

@@ -31,6 +31,14 @@ TEST_CASE("Print single script argument", TAG_SCRIPTARGS) {
     compareDaphneToStr("-123.45\n"    , scriptPath.c_str(), "--args", "foo=-123.45");
     compareDaphneToStr("1\n"          , scriptPath.c_str(), "--args", "foo=true");
     compareDaphneToStr("hello world\n", scriptPath.c_str(), "--args", "foo=\"hello world\"");
+    compareDaphneToStr("nan\n", scriptPath.c_str(), "--args", "foo=nan");
+    compareDaphneToStr("inf\n", scriptPath.c_str(), "--args", "foo=inf");
+    compareDaphneToStr("-inf\n", scriptPath.c_str(), "--args", "foo=-inf");
+    compareDaphneToStr("12.34\n", scriptPath.c_str(), "--args", "foo=12.34f");
+    compareDaphneToStr("120000\n", scriptPath.c_str(), "--args", "foo=1.2e5f");
+    compareDaphneToStr("1e-14\n", scriptPath.c_str(), "--args", "foo=1E-14");
+    compareDaphneToStr("1\n", scriptPath.c_str(), "--args", "foo=true");
+    compareDaphneToStr("0\n", scriptPath.c_str(), "--args", "foo=false");
 }
 
 TEST_CASE("Missing script argument", TAG_SCRIPTARGS) {
@@ -89,13 +97,15 @@ TEST_CASE("Ways of specifying script arguments", TAG_SCRIPTARGS) {
     CHECK(err.str() == "");
 }
 
-// TODO While DAPHNE does not evaluate the expressions provided as script arguments,
-// these invalid script arguments are not properly detected, either. DAPHNE succeeds
-// with unexpected results (see #773).
-#if 0
+
 TEST_CASE("Don't support general expressions as script arguments", TAG_SCRIPTARGS) {
     const std::string scriptPath = dirPath + "printSingleArg.daphne";
     checkDaphneFails(scriptPath.c_str(), "--args", "foo=10+10");
     checkDaphneFails(scriptPath.c_str(), "--args", "foo=sin(1.23)");
 }
-#endif
+
+TEST_CASE("Don't support literal mixtures ", TAG_SCRIPTARGS) {
+    const std::string scriptPath = dirPath + "printSingleArg.daphne";
+    checkDaphneFails(scriptPath.c_str(), "--args", "foo=10xyz23");
+    checkDaphneFails(scriptPath.c_str(), "--args", "foo=-0.0mo");
+}