Rework Grammar and Parser

Properly construct headless binary with basic validation and print functionality

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

Add proper Grammar value retrieval
Simplify AST node resolution for Grammar

Add AbstractSyntaxTree for v2script data parser:
	Has compile-time embedded type information accessible at compile-time and runtime
	Optionally compiled AST print functionality

Add detail/TypeName.hpp
Add detail/SelfType.hpp
Add detail/DetectUtf8.hpp
Add detail/Errors.hpp
Add detail/Warnings.hpp

Add `OPENVIC_DATALOADER_PRINT_NODES` for headless construction
Fix wrong environment reference for headless construction in SConstruct

1 files changed, 33 insertions, 1 deletions

diff --git a/src/headless/main.cpp b/src/headless/main.cpp
index ffc6dab..afd569f 100644
--- a/src/headless/main.cpp
+++ b/src/headless/main.cpp
@@ -1,3 +1,35 @@
-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;
+		}
+	}
+
+#ifdef OPENVIC_DATALOADER_PRINT_NODES
+	parser.get_file_node()->print(std::cout);
+#endif
+
 	return 0;
 }
\ No newline at end of file