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Kea 3.0.0
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Parser for a logical expression. More...
#include <client_class_def_parser.h>
Public Member Functions | |
| void | parse (ExpressionPtr &expression, isc::data::ConstElementPtr expression_cfg, uint16_t family, isc::eval::EvalContext::CheckDefined check_defined=isc::eval::EvalContext::acceptAll, isc::eval::EvalContext::ParserType parser_type=isc::eval::EvalContext::PARSER_BOOL) |
| Parses an expression configuration element into an Expression. | |
| Public Member Functions inherited from isc::data::SimpleParser | |
| uint16_t | getUint16 (isc::data::ConstElementPtr scope, const std::string &name) |
| Returns a value converted to uint16_t. | |
| uint32_t | getUint32 (isc::data::ConstElementPtr scope, const std::string &name) |
| Returns a value converted to uint32_t. | |
| uint8_t | getUint8 (ConstElementPtr scope, const std::string &name) |
| Get an uint8_t value. | |
| const isc::util::Triplet< uint32_t > | parseIntTriplet (const data::ConstElementPtr &scope, const std::string &name) |
| Parses an integer triplet. | |
Additional Inherited Members | |
| Static Public Member Functions inherited from isc::data::SimpleParser | |
| static void | checkKeywords (const SimpleKeywords &keywords, isc::data::ConstElementPtr scope) |
| Checks acceptable keywords with their expected type. | |
| static void | checkRequired (const SimpleRequiredKeywords &required, isc::data::ConstElementPtr scope) |
| Checks that all required keywords are present. | |
| static size_t | deriveParams (isc::data::ConstElementPtr parent, isc::data::ElementPtr child, const ParamsList ¶ms) |
| Derives (inherits) parameters from parent scope to a child. | |
| static isc::asiolink::IOAddress | getAddress (const ConstElementPtr &scope, const std::string &name) |
| Returns a IOAddress parameter from a scope. | |
| static bool | getBoolean (isc::data::ConstElementPtr scope, const std::string &name) |
| Returns a boolean parameter from a scope. | |
| static double | getDouble (const ConstElementPtr &scope, const std::string &name) |
| Returns a floating point parameter from a scope. | |
| static int64_t | getInteger (isc::data::ConstElementPtr scope, const std::string &name) |
| Returns an integer parameter from a scope. | |
| static int64_t | getInteger (isc::data::ConstElementPtr scope, const std::string &name, int64_t min, int64_t max) |
| Returns an integer parameter from a scope and checks its range. | |
| static const data::Element::Position & | getPosition (const std::string &name, const data::ConstElementPtr parent) |
| Utility method that returns position of an element. | |
| static std::string | getString (isc::data::ConstElementPtr scope, const std::string &name) |
| Returns a string parameter from a scope. | |
| static size_t | setDefaults (isc::data::ElementPtr scope, const SimpleDefaults &default_values) |
| Sets the default values. | |
| static size_t | setListDefaults (isc::data::ConstElementPtr list, const SimpleDefaults &default_values) |
| Sets the default values for all entries in a list. | |
| Protected Member Functions inherited from isc::data::SimpleParser | |
| template<typename target_type, target_type convert> | |
| target_type | getAndConvert (isc::data::ConstElementPtr scope, const std::string &name, const std::string &type_name) |
| Returns a converted value from a scope. | |
| template<typename int_type> | |
| int_type | getIntType (isc::data::ConstElementPtr scope, const std::string &name) |
| Returns an integer value with range checking from a scope. | |
Parser for a logical expression.
This parser creates an instance of an Expression from a string. The string is passed to the Eval Parser and the resultant Expression is stored into the ExpressionPtr reference passed into the constructor.
Definition at line 63 of file client_class_def_parser.h.
| void isc::dhcp::ExpressionParser::parse | ( | ExpressionPtr & | expression, |
| isc::data::ConstElementPtr | expression_cfg, | ||
| uint16_t | family, | ||
| isc::eval::EvalContext::CheckDefined | check_defined = isc::eval::EvalContext::acceptAll, | ||
| isc::eval::EvalContext::ParserType | parser_type = isc::eval::EvalContext::PARSER_BOOL ) |
Parses an expression configuration element into an Expression.
| expression | variable in which to store the new expression |
| expression_cfg | the configuration entry to be parsed. |
| family | the address family of the expression. |
| check_defined | a closure to check if a client class is defined. |
| parser_type | the expected type of the evaluated expression. |
| DhcpConfigError | if parsing was unsuccessful. |
Definition at line 38 of file client_class_def_parser.cc.
References isc::eval::EvalContext::expression_, isc_throw, isc::eval::EvalContext::PARSER_STRING, isc::eval::EvalContext::parseString(), isc::data::Element::string, isc::dhcp::Option::V4, and isc::dhcp::Option::V6.
Referenced by isc::dhcp::ClientClassDictionary::initMatchExpr(), and isc::dhcp::ClientClassDefParser::parse().