Module settings

Shared settings module.

This module defines data structures to access the settings defined in the meta language.

Each settings group is translated to a Flags struct either in this module or in its ISA-specific settings module. The struct provides individual getter methods for all of the settings as well as computed predicate flags.

The Flags struct is immutable once it has been created. A Builder instance is used to create it.

Example

use cranelift_codegen::settings::{self, Configurable};

let mut b = settings::builder();
b.set("opt_level", "speed_and_size");

let f = settings::Flags::new(b);
assert_eq!(f.opt_level(), settings::OptLevel::SpeedAndSize);

Modules

• detail
  Implementation details for generated code.

Structs

• Builder
  Collect settings values based on a template.
• Flags
  Flags group shared.
• FlagsOrIsa
  Wrapper containing flags and optionally a TargetIsa trait object.
• PredicateView
  A reference to just the boolean predicates of a settings object.
• Setting
  Represents an available builder setting.
• Value
  Represents a setting value.

Enums

• LibcallCallConv
  Values for shared.libcall_call_conv.
• OptLevel
  Values for shared.opt_level.
• ProbestackStrategy
  Values for shared.probestack_strategy.
• RegallocAlgorithm
  Values for shared.regalloc_algorithm.
• SetError
  An error produced when changing a setting.
• SettingKind
  Represents the kind of setting.
• StackSwitchModel
  Values for shared.stack_switch_model.
• TlsModel
  Values for shared.tls_model.

Traits

• Configurable
  A string-based configurator for settings groups.

Functions

• builder
  Create a settings::Builder for the shared settings group.

Type Aliases

• SetResult
  A result returned when changing a setting.