get a druntime config option using standard configuration options
opt name of the option to retrieve
dg if non-null, passes the option through this
delegate and only returns its return value if non-null
reverse reverse the default processing order cmdline/envvar/rt_options
to allow overwriting settings in the delegate with values
from higher priority
*
returns the options' value if
- set on the command line as "--DRT-<opt>=value" (rt_cmdline_enabled enabled)
- the environment variable "DRT_<OPT>" is set (rt_envvars_enabled enabled)
- rt_options[] contains an entry "<opt>=value"
- null otherwise
The D Programming Language's Unofficial Docs
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get a druntime config option using standard configuration options opt name of the option to retrieve dg if non-null, passes the option through this delegate and only returns its return value if non-null reverse reverse the default processing order cmdline/envvar/rt_options to allow overwriting settings in the delegate with values from higher priority * returns the options' value if - set on the command line as "--DRT-<opt>=value" (rt_cmdline_enabled enabled) - the environment variable "DRT_<OPT>" is set (rt_envvars_enabled enabled) - rt_options[] contains an entry "<opt>=value" - null otherwise