From c5169863e1ec3060d3bdc3b8c0317710ce8c3ee3 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Mon, 19 Dec 2022 20:54:29 +0200
Subject: [PATCH] Use std::function instead of sigc::slot in BooleanEvaluator

---
 source/booleanevaluator.cpp  | 8 ++++----
 source/booleanevaluator.h    | 8 ++++----
 source/conditionalloader.cpp | 5 +++--
 3 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/source/booleanevaluator.cpp b/source/booleanevaluator.cpp
index 0103741..074956a 100644
--- a/source/booleanevaluator.cpp
+++ b/source/booleanevaluator.cpp
@@ -5,8 +5,8 @@ using namespace std;
 
 /* I'd rather have overloads with different slots, but that creates an
 ambiguity because slots have template constructors. */
-BooleanEvaluator::BooleanEvaluator(const Slot &s, bool allow_compare):
-	slot(s),
+BooleanEvaluator::BooleanEvaluator(const Function &f, bool allow_compare):
+	func(f),
 	ops(allow_compare ? "&|!=^" : "&|!")
 { }
 
@@ -31,7 +31,7 @@ bool BooleanEvaluator::evaluate(const string &str)
 					op_stack.pop_back();
 					string var = var_stack.back();
 					var_stack.pop_back();
-					bool value = (slot(var, &buf) == (op=='='));
+					bool value = (func(var, &buf) == (op=='='));
 					value_stack.push_back(value);
 				}
 				else
@@ -81,7 +81,7 @@ bool BooleanEvaluator::pop_value()
 	{
 		string var = var_stack.back();
 		var_stack.pop_back();
-		return slot(var, 0);
+		return func(var, 0);
 	}
 	else if(!value_stack.empty())
 	{
diff --git a/source/booleanevaluator.h b/source/booleanevaluator.h
index 08ed432..7c2af6f 100644
--- a/source/booleanevaluator.h
+++ b/source/booleanevaluator.h
@@ -1,17 +1,17 @@
 #ifndef BOOLEANEVALUATOR_H_
 #define BOOLEANEVALUATOR_H_
 
+#include <functional>
 #include <string>
 #include <vector>
-#include <sigc++/slot.h>
 
 class BooleanEvaluator
 {
 public:
-	typedef sigc::slot<bool, const std::string &, const std::string *> Slot;
+	using Function = std::function<bool(const std::string &, const std::string *)>;
 
 private:
-	Slot slot;
+	Function func;
 	std::string ops;
 	std::vector<std::string> var_stack;
 	std::vector<unsigned char> value_stack;
@@ -19,7 +19,7 @@ private:
 	bool last_was_op;
 
 public:
-	BooleanEvaluator(const Slot &, bool = true);
+	BooleanEvaluator(const Function &, bool = true);
 
 	bool evaluate(const std::string &);
 private:
diff --git a/source/conditionalloader.cpp b/source/conditionalloader.cpp
index 43e613b..731c559 100644
--- a/source/conditionalloader.cpp
+++ b/source/conditionalloader.cpp
@@ -16,7 +16,8 @@ ArchitectureConditional::ArchitectureConditional(const Builder &b, const string
 
 void ArchitectureConditional::if_arch(const string &cond)
 {
-	BooleanEvaluator eval(sigc::hide<1>(sigc::mem_fun(&builder.get_current_arch(), &Architecture::match_name)), false);
+	const Architecture &arch = builder.get_current_arch();
+	BooleanEvaluator eval([&arch](const string &value, const string *){ return arch.match_name(value); }, false);
 	bool match = eval.evaluate(cond);
 	builder.get_logger().log("configure", format("%s: arch %s %smatched", log_prefix, cond, (match ? "" : "not ")));
 	if(match)
@@ -33,7 +34,7 @@ FeatureConditional::FeatureConditional(const SourcePackage &p, const string &l):
 
 void FeatureConditional::if_feature(const string &cond)
 {
-	BooleanEvaluator eval(sigc::mem_fun(&package, &SourcePackage::match_feature));
+	BooleanEvaluator eval([this](const string &feat, const string *value){ return package.match_feature(feat, value); });
 	bool match = eval.evaluate(cond);
 	package.get_builder().get_logger().log("configure", format("%s: feature %s %smatched", log_prefix, cond, (match ? "" : "not ")));
 	if(match)
-- 
2.43.0