Rework Grammar and Parser

Add proper headless binary construction:
	Includes basic validation

Add Error and Warning structs to Parser
Add FileNode pointer getter to Parser
Change all `char8_t*` and `const char8_t` to `const char*` in Parser
Add Parser move operators and Parser deconstructor
Add BufferHandler PIMPL object to Parser
Add UTF-8 file Warning to v2script
Add proper Grammar value retrieval
Add AbstractSyntaxTree for v2script data parser:
	Has compile-time embedded type information accessible at compile-time and runtime
	Has Tab-based print functionality

Fix wrong environment reference for headless construction in SConstruct
Add error retrieval
Add BasicCallbackOStreamBuffer for callback streaming
Add CallbackStreamBuffer for char
Add CallbackWStreamBuffer for wchar_t
Add BasicCallbackStream
Add CallbackStream for char
Add CallbackWStream for wchar_t
Add grammar for events and decisions
Add event_parse to Parser
Add decision_parse to Parser
Add .clang-format
Ignore dirty lexy module
Add CSV parser and grammar:
	Creates std::vector<csv::LineObject> for a list of lines

Add BasicParser and BasicBufferHandler to reduce code reduplication

1 files changed, 31 insertions, 1 deletions

diff --git a/src/headless/main.cpp b/src/headless/main.cpp
index ffc6dab..94d6b8d 100644
--- a/src/headless/main.cpp
+++ b/src/headless/main.cpp
@@ -1,3 +1,33 @@
-int main() {
+#include <cstdio>
+#include <iostream>
+#include <string>
+#include <vector>
+
+#include <openvic-dataloader/v2script/Parser.hpp>
+
+int main(int argc, char** argv) {
+	if (argc < 2) {
+		std::fprintf(stderr, "usage: %s <filename>", argv[0]);
+		return 1;
+	}
+
+	auto parser = ovdl::v2script::Parser::from_file(argv[1]);
+	if (parser.has_error()) {
+		return 1;
+	}
+
+	parser.simple_parse();
+	if (parser.has_error()) {
+		return 2;
+	}
+
+	if (parser.has_warning()) {
+		for (auto& warning : parser.get_warnings()) {
+			std::cerr << "Warning: " << warning.message << std::endl;
+		}
+	}
+
+	std::cout << parser.get_file_node() << std::endl;
+
 	return 0;
 }
\ No newline at end of file