Volt

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Volt is an open source programming language created in 2011.

Source code:

git clone https://github.com/VoltLang/Volta

#570on PLDB

13Years Old

158Repos

Volt is a C-inspired programming language that toes the line between expressiveness and control.

Volt website
Volt is developed on GitHub and has 142 stars
There are at least 158 Volt repos on GitHub
file extensions for Volt include volt
The Google BigQuery Public Dataset GitHub snapshot shows 298 users using Volt in 351 repos on GitHub
GitHub supports syntax highlighting for Volt
volt-lang.org was registered in 2013

Example from Linguist:

// Copyright © 2012-2013, Jakob Bornecrantz.  All rights reserved.
// See copyright notice in src/volt/license.d (BOOST ver. 1.0).
module main;

import core.stdc.stdio;
import core.stdc.stdlib;

import watt.process;
import watt.path;

import results;
import list;
import cmd;

int main()
{
	auto cmdGroup = new CmdGroup();
	bool printOk = true;
	bool printImprovments = true;
	bool printFailing = true;
	bool printRegressions = true;
	string compiler = getEnv("VOLT");

	if (compiler is null) {
		printf("compiler envar not set\n".ptr);
		return -1;
	}

	/// @todo Scan for files
	auto tests = testList;

	int total;
	int passed;
	int failed;
	int improved;
	int regressed;

	auto rets = new Result[] (tests.length);
	for (size_t i; i < tests.length; i++) {
		rets[i] = new Result();
		rets[i].runTest(cmdGroup, tests[i], compiler);
	}

	cmdGroup.waitAll();

	for (size_t i; i < tests.length; i++) {
		auto ret = rets[i];
		total++;
		if (ret.ok) {
			passed++;
			improved += cast(int)!ret.hasPassed;

			if (!ret.hasPassed && printImprovments) {
				printf("%s: %s, improved!\n".ptr, ret.test.ptr, ret.msg.ptr);
			} else if (printOk) {
				printf("%s: %s\n".ptr, ret.test.ptr, ret.msg.ptr);
			}
		} else {
			failed++;
			regressed += cast(int)ret.hasPassed;


			if (ret.hasPassed && printRegressions) {
				printf("%s: %s, regressed!\n".ptr, ret.test.ptr, ret.msg.ptr);
			} else if (printFailing) {
				printf("%s: %s\n".ptr, ret.test.ptr, ret.msg.ptr);
			}
		}
		fflush(stdout);
	}

	auto xml = fopen("results.xml".ptr, "w+".ptr);
	if (xml !is null) {
		fprintf(xml, "<testsuites errors=\"%u\" failures=\"%u\" tests=\"%u\">\n".ptr,
				regressed, failed - regressed, total);
		for (size_t i; i < rets.length; i++) {
			rets[i].xmlLog(xml);
		}
		fprintf(xml, "</testsuites>\n".ptr);
		fflush(xml);
		fclose(xml);
		xml = null;
	}

	auto rate = cast(float)passed / cast(float)total * 100.f;
	printf("Summary: %i tests, %i pass%s, %i failure%s, %.2f%% pass rate, %i regressions, %i improvements.\n".ptr,
	       total,
	       passed, (passed == 1 ? "".ptr : "es".ptr),
	       failed, (failed == 1 ? "".ptr : "s".ptr),
	       cast(double)rate, regressed, improved);

	return regressed ? -1 : 0;
}

Feature	Supported	Token	Example
Print() Debugging	✓	printf
Comments	✓		// A comment
Line Comments	✓	//	// A comment
Semantic Indentation	X

Volt - Programming language

Language features