Main: Fix compilation of older steps

src/step5_tco.cpp

@@ -29,9 +29,7 @@ static blaze::EnvironmentPtr s_outer_env = blaze::Environment::create();
 static auto cleanup(int signal) -> void;
 static auto installLambdas(blaze::EnvironmentPtr env) -> void;
 static auto rep(std::string_view input, blaze::EnvironmentPtr env) -> std::string;
-static auto read(std::string_view input) -> blaze::ASTNodePtr;
-static auto eval(blaze::ASTNodePtr ast, blaze::EnvironmentPtr env) -> blaze::ASTNodePtr;
-static auto print(blaze::ASTNodePtr exp) -> std::string;
+static auto print(blaze::ValuePtr exp) -> std::string;
 
 auto main(int argc, char* argv[]) -> int
 {
@@ -99,35 +97,39 @@ static auto rep(std::string_view input, blaze::EnvironmentPtr env) -> std::strin
 	blaze::Error::the().clearErrors();
 	blaze::Error::the().setInput(input);
 
-	return print(eval(read(input), env));
+	return print(blaze::eval(blaze::read(input), env));
 }
 
-static auto read(std::string_view input) -> blaze::ASTNodePtr
+namespace blaze {
+
+auto read(std::string_view input) -> ValuePtr
 {
-	blaze::Lexer lexer(input);
+	Lexer lexer(input);
 	lexer.tokenize();
-	if (blaze::Settings::the().get("dump-lexer") == "1") {
+	if (Settings::the().get("dump-lexer") == "1") {
 		lexer.dump();
 	}
 
-	blaze::Reader reader(std::move(lexer.tokens()));
+	Reader reader(std::move(lexer.tokens()));
 	reader.read();
-	if (blaze::Settings::the().get("dump-reader") == "1") {
+	if (Settings::the().get("dump-reader") == "1") {
 		reader.dump();
 	}
 
 	return reader.node();
 }
 
-static auto eval(blaze::ASTNodePtr ast, blaze::EnvironmentPtr env) -> blaze::ASTNodePtr
+auto eval(ValuePtr ast, EnvironmentPtr env) -> ValuePtr
 {
-	blaze::Eval eval(ast, env);
+	Eval eval(ast, env);
 	eval.eval();
 
 	return eval.ast();
 }
 
-static auto print(blaze::ASTNodePtr exp) -> std::string
+} // namespace blaze
+
+static auto print(blaze::ValuePtr exp) -> std::string
 {
 	blaze::Printer printer;