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path: root/src/brussel.codegen.comp/CodegenDecl.cpp
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#include "CodegenDecl.hpp"

#include "CodegenUtils.hpp"

#include <fmt/format.h>
#include <Utils.hpp>

const std::string& DeclStruct::GetMangledName() const {
	if (mangledName.empty()) {
		mangledName = Utils::MakeMangledName(name, container);
	}
	return mangledName;
}

std::string DeclXGlobalVar::MangleCtorName(std::string_view targetName) {
	return fmt::format("{}_MANGLED_ctor", targetName);
}

std::string DeclXGlobalVar::MangleDtorName(std::string_view targetName) {
	return fmt::format("{}_MANGLED_dtor", targetName);
}

const std::string& DeclEnum::GetMangledName() const {
	if (mangledName.empty()) {
		mangledName = Utils::MakeMangledName(name, container);
	}
	return mangledName;
}

static EnumValuePattern NextPattern(EnumValuePattern val) {
	return (EnumValuePattern)(val + 1);
}

EnumValuePattern DeclEnum::CalcPattern() const {
	if (elements.empty()) return EVP_Continuous;

	auto pattern = EVP_Continuous;
restart:
	auto lastVal = elements[0].value;
	for (size_t i = 1; i < elements.size(); ++i) {
		auto currVal = elements[i].value;
		switch (pattern) {
			case EVP_Continuous: {
				bool satisfy = lastVal + 1 == currVal;
				if (!satisfy) {
					pattern = NextPattern(pattern);
					goto restart;
				}
			} break;

			case EVP_Bits: {
				bool satisfy = (lastVal << 1) == currVal;
				if (!satisfy) {
					pattern = NextPattern(pattern);
					goto restart;
				}
			} break;

			// A random pattern can match anything
			case EVP_Random:
			case EVP_COUNT: break;
		}
		lastVal = currVal;
	}

	return pattern;
}

EnumValuePattern DeclEnum::GetPattern() const {
	if (pattern == EVP_COUNT) {
		pattern = CalcPattern();
	}
	return pattern;
}