add break and continue commands

alib2cli/src/ast/command/BreakCommand.h

+#ifndef _CLI_BREAK_COMMAND_H_
+#define _CLI_BREAK_COMMAND_H_
+
+#include <ast/Command.h>
+#include <environment/Environment.h>
+
+namespace cli {
+
+class BreakCommand : public Command {
+public:
+	CommandResult run ( Environment & /* environment */ ) const override {
+		return CommandResult::BREAK;
+	}
+};
+
+} /* namespace cli */
+
+#endif /* _CLI_BREAK_COMMAND_H_ */

alib2cli/src/ast/command/CommandList.h

@@ -17,6 +17,9 @@ public:
 		for ( size_t i = 0; i < m_commands.size ( ) && res == CommandResult::OK; ++ i ) {
 			res = m_commands [ i ]->run ( environment );
 			environment.clearTemporaries ( );
+
+			if ( res == CommandResult::CONTINUE || res == CommandResult::BREAK )
+				return res;
 		}
 		return res;

alib2cli/src/ast/command/CommandResult.h

@@ -7,6 +7,8 @@ enum class CommandResult {
 	OK,
 	QUIT,
 	RETURN,
+	CONTINUE,
+	BREAK,
 	EXCEPTION,
 	ERROR,
 	EOT

alib2cli/src/ast/command/ContinueCommand.h

+#ifndef _CLI_CONTINUE_COMMAND_H_
+#define _CLI_CONTINUE_COMMAND_H_
+
+#include <ast/Command.h>
+#include <environment/Environment.h>
+
+namespace cli {
+
+class ContinueCommand : public Command {
+public:
+	CommandResult run ( Environment & /* environment */ ) const override {
+		return CommandResult::CONTINUE;
+	}
+};
+
+} /* namespace cli */
+
+#endif /* _CLI_CONTINUE_COMMAND_H_ */

alib2cli/src/ast/command/WhileCommand.h

@@ -27,6 +27,14 @@ public:
 				break;
 			res = m_body->run ( environment );
+
+			if ( res == CommandResult::CONTINUE )
+				res = CommandResult::OK;
+
+			if ( res == CommandResult::BREAK ) {
+				res = CommandResult::OK;
+				break;
+			}
 		}
 		return res;

alib2cli/src/environment/Environment.cpp

@@ -21,7 +21,12 @@ cli::CommandResult Environment::execute ( std::shared_ptr < cli::LineInterface >
 cli::CommandResult Environment::execute_line ( cli::CharSequence charSequence ) {
 	try {
 		cli::Parser parser = cli::Parser ( cli::Lexer ( std::move ( charSequence ) ) );
-		return parser.parse ( )->run ( * this );
+		cli::CommandResult res = parser.parse ( )->run ( * this );
+
+		if ( res == CommandResult::CONTINUE || res == CommandResult::BREAK )
+			throw std::logic_error ( "There is no loop to continue/break." );
+
+		return res;
 	} catch ( ... ) {
 		alib::ExceptionHandler::handle ( common::Streams::err );
 		return cli::CommandResult::EXCEPTION;

alib2cli/src/parser/Parser.cpp

@@ -35,6 +35,8 @@
 #include <ast/command/InterpretCommand.h>
 #include <ast/command/IfCommand.h>
 #include <ast/command/WhileCommand.h>
+#include <ast/command/BreakCommand.h>
+#include <ast/command/ContinueCommand.h>
 #include <ast/command/ReturnCommand.h>
 #include <ast/expression/BatchExpression.h>
@@ -523,6 +525,16 @@ std::unique_ptr < Command > Parser::command ( ) {
 		std::unique_ptr < Command > body = semicolon_command ( );
 		return std::make_unique < WhileCommand > ( std::move ( condition ), std::move ( body ) );
+	} else if ( check_nonreserved_kw ( "break" ) ) {
+		if ( globalScope ( ) )
+			throw exception::CommonException ( "Statement not available in global scope." );
+		match_nonreserved_kw ( "break" );
+		return std::make_unique < BreakCommand > ( );
+	} else if ( check_nonreserved_kw ( "continue" ) ) {
+		if ( globalScope ( ) )
+			throw exception::CommonException ( "Statement not available in global scope." );
+		match_nonreserved_kw ( "continue" );
+		return std::make_unique < ContinueCommand > ( );
 	} else {
 		throw exception::CommonException ( "Mismatched set " + ext::to_string ( getCheckOptions ( ) ) + " while expanding parse rule. Token is " + ( ( std::string ) m_current ) + "." );
 	}