Struct CliConfig 

pub struct CliConfig { /* private fields */ }

Rustflags provided via cargo’s --config CLI option.

Cargo merges --config values in left-to-right order with the same logic used for config files: arrays are joined with higher precedence items placed later. CLI values take precedence over config files and config environment variables (CARGO_TARGET_<T>_RUSTFLAGS, CARGO_BUILD_RUSTFLAGS), but not over the RUSTFLAGS/CARGO_ENCODED_RUSTFLAGS environment variables, which shortcut the rustflags resolution entirely.

Implementations

impl CliConfig

pub fn parse(config_args: &[String]) -> Result<Self>

Parses cargo --config arguments (KEY=VALUE in TOML syntax, or a path to an extra config file ending in .toml).

target.'cfg(...)' keys are ignored because evaluating cfg expressions requires querying rustc; cargo still applies them to the actual build, they just don’t influence zig’s -mcpu.

pub fn rustflags( &self, cargo_config: &Config, rust_target: &str, ) -> Result<Option<Flags>>

Resolves the effective rustflags for rust_target, overlaying the CLI-provided values onto the config file/environment resolution.

Cargo resolves rustflags from four mutually exclusive sources, in order, using the first one that is set:

1. CARGO_ENCODED_RUSTFLAGS environment variable
2. RUSTFLAGS environment variable
3. all matching target.<triple>.rustflags and target.<cfg>.rustflags config entries joined together
4. build.rustflags config value

--config values participate in sources 3 and 4 with the highest precedence within those sources (joined last).

Trait Implementations

impl Clone for CliConfig

fn clone(&self) -> CliConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CliConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for CliConfig

fn default() -> CliConfig

Returns the “default value” for a type.

impl PartialEq for CliConfig

fn eq(&self, other: &CliConfig) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for CliConfig