core.internal.parseoptions

struct MemVal;

UDA for field treated as memory value

bool initConfigOptions(CFG)(ref CFG cfg, string cfgname);

initialize members of struct CFG from rt_config options

options will be read from the environment, the command line or embedded into the executable as configured (see rt.config)

fields of the struct are populated by parseOptions().

bool parseOptions(CFG)(ref CFG cfg, string opt);

initialize members of struct CFG from a string of sub-options.

fields of the struct are populated by listing them as space separated sub-options :value, e.g. "precise:1 profile:1"

supported field value types:

• strings (without spaces)
• integer types (positive values only)
• bool
• float

If the struct has a member "help" it is called if it is found as a sub-option. If the struct has a member "errorName", is used as the name reported in error messages. Otherwise the struct name is used.

bool rt_parseOption(T)(const(char)[] optname, ref inout(char)[] str, ref T res, const(char)[] errName);

Parses an individual option optname value from a provided string str. The option type is given by the type T of the field res to which the parsed value will be written too. In case of an error, errName will be used to display an error message and the failure of the parsing will be indicated by a falsy return value.

For boolean values, '0/n/N' (false) or '1/y/Y' (true) are accepted.

Parameters:

const(char)[] optname	name of the option to parse
inout(char)[] str	raw string to parse the option value from
T res	reference to the resulting data field that the option should be parsed too
const(char)[] errName	full-text name of the option which should be displayed in case of errors

Returns:

false if a parsing error happened.