tests/extra/tc_ufcs_all_kinds: support gdc

Remove the usage of `-run` which isn't supported by gdc and only pass
`-verrors=0` to dmd and ldc2 since gdc doesn't support the flag and,
by default, all errors are printed.

Change the format in which errors are printed to keep it consistent
across all the three major compilers (a style that they all support is
the gnu style) and make the matching code in generate_tests.d more
readable by using a regex.

Signed-off-by: Andrei Horodniceanu <a.horodniceanu@proton.me>

.gitignore

@@ -31,6 +31,8 @@ stdout.txt
 # script-generated expected with absolute file paths
 tests/tc_locate_ufcs_function/expected.txt
 tests/tc_recursive_public_import/expected.txt
+# other script-generated files
+tests/extra/tc_ufcs_all_kinds/generate_tests
 
 # Dub files
 .dub

tests/extra/tc_ufcs_all_kinds/generate_tests.d

@@ -129,29 +129,28 @@ int main(string[] args)
 
 	fs.write("proc_test.d", code);
 
-	auto output = executeShell("$DC -verrors=0 -c proc_test.d").output;
+	// $DC and $ERROR_FLAGS are set up in run.sh
+	auto output = executeShell("$DC $ERROR_FLAGS -c proc_test.d").output;
 
 	size_t numErrors = 0;
 
 	string[][string] variableIncompatibilities;
 
+	// Example of a line we want to match: `proc_test.d:2568:22: error: [...]'
+	auto errRegex = regex(`proc_test\.d:([0-9]*):[0-9]*: error`, "i");
 	foreach (err; output.lineSplitter)
 	{
-		if (!err.startsWith("proc_test.d("))
-			continue;
-		err = err["proc_test.d(".length .. $];
-		auto lineNo = err.parse!int;
-		if (!err.startsWith("): Error: "))
-			continue;
-		err = err["): Error: ".length .. $];
-		string line = lines[lineNo - 1];
-		enforce(line.endsWith("();"), "Unexpected error in line " ~ lineNo.to!string);
-		line = line[0 .. $ - 3];
-		string varName = line.findSplit(".")[0];
-		string funcName = line.findSplit(".")[2];
-		// writeln("variable type ", varLookup[varName], " can't call ", funcLookup[funcName]);
-		variableIncompatibilities[varName] ~= funcName;
-		numErrors++;
+		if (auto m = matchFirst(err, errRegex)) {
+			auto lineNo = to!int(m[1]);
+			string line = lines[lineNo - 1];
+			enforce(line.endsWith("();"), "Unexpected error in line " ~ lineNo.to!string);
+			line = line[0 .. $ - 3];
+			string varName = line.findSplit(".")[0];
+			string funcName = line.findSplit(".")[2];
+			// writeln("variable type ", varLookup[varName], " can't call ", funcLookup[funcName]);
+			variableIncompatibilities[varName] ~= funcName;
+			numErrors++;
+		}
 	}
 
 	enforce(numErrors > 1_000, "compiler didn't error as expected, need to adjust tests!");

tests/extra/tc_ufcs_all_kinds/run.sh

@@ -4,4 +4,26 @@ if [ -z "${DC:-}" ]; then
 	DC=dmd
 fi
 
-DC="$DC" "$DC" -run generate_tests.d "$1"
+DCBASE=$(basename ${DC})
+
+# Set up ERROR_FLAGS to make all compilers output errors in the same
+# format to make matching easier in generate_tests.d. Also make them
+# output all errors.
+if [[ ${DCBASE} == *gdc* ]]; then
+	outputFlag=-o
+	# Not needed as gdc defaults to printing all errors
+	ERROR_FLAGS=
+elif [[ ${DCBASE} == *gdmd* ]]; then
+	outputFlag=-of
+	ERROR_FLAGS=
+elif [[ ${DCBASE} == *ldc* || ${DCBASE} == *dmd* ]]; then
+	outputFlag=-of
+	ERROR_FLAGS='-verrors=0 -verror-style=gnu -vcolumns'
+else
+	echo "Unknown compiler ${DC}"
+	exit 1
+fi
+
+$DC ${outputFlag}generate_tests generate_tests.d
+export DC ERROR_FLAGS
+./generate_tests "${1}"