Struct rustc_session::options::Options

pub struct Options {

    pub crate_types: Vec<CrateType>,
    pub optimize: OptLevel,
    pub debug_assertions: bool,
    pub debuginfo: DebugInfo,
    pub lint_opts: Vec<(String, Level)>,
    pub lint_cap: Option<Level>,
    pub describe_lints: bool,
    pub output_types: OutputTypes,
    pub search_paths: Vec<SearchPath>,
    pub libs: Vec<NativeLib>,
    pub maybe_sysroot: Option<PathBuf>,
    pub target_triple: TargetTriple,
    pub test: bool,
    pub error_format: ErrorOutputType,
    pub incremental: Option<PathBuf>,
    pub debugging_opts: DebuggingOptions,
    pub prints: Vec<PrintRequest>,
    pub borrowck_mode: BorrowckMode,
    pub cg: CodegenOptions,
    pub externs: Externs,
    pub extern_dep_specs: ExternDepSpecs,
    pub crate_name: Option<String>,
    pub alt_std_name: Option<String>,
    pub unstable_features: UnstableFeatures,
    pub actually_rustdoc: bool,
    pub trimmed_def_paths: TrimmedDefPaths,
    pub cli_forced_codegen_units: Option<usize>,
    pub cli_forced_thinlto_off: bool,
    pub remap_path_prefix: Vec<(PathBuf, PathBuf)>,
    pub real_rust_source_base_dir: Option<PathBuf>,
    pub edition: Edition,
    pub json_artifact_notifications: bool,
    pub json_unused_externs: bool,
    pub pretty: Option<PpMode>,
    pub working_dir: RealFileName,
}

The top-level command-line options struct.

For each option, one has to specify how it behaves with regard to the dependency tracking system of incremental compilation. This is done via the square-bracketed directive after the field type. The options are:

• [TRACKED] A change in the given field will cause the compiler to completely clear the incremental compilation cache before proceeding.

• [TRACKED_NO_CRATE_HASH] Same as [TRACKED], but will not affect the crate hash. This is useful for options that only affect the incremental cache.

• [UNTRACKED] Incremental compilation is not influenced by this option.

• [SUBSTRUCT] Second-level sub-structs containing more options.

If you add a new option to this struct or one of the sub-structs like CodegenOptions, think about how it influences incremental compilation. If in doubt, specify [TRACKED], which is always “correct” but might lead to unnecessary re-compilation.

Fields

crate_types: Vec<CrateType>

The crate config requested for the session, which may be combined with additional crate configurations during the compile process.

optimize: OptLevel

debug_assertions: bool

Include the debug_assertions flag in dependency tracking, since it can influence whether overflow checks are done or not.

debuginfo: DebugInfo

lint_opts: Vec<(String, Level)>

lint_cap: Option<Level>

describe_lints: bool

output_types: OutputTypes

search_paths: Vec<SearchPath>

libs: Vec<NativeLib>

maybe_sysroot: Option<PathBuf>

target_triple: TargetTriple

test: bool

error_format: ErrorOutputType

incremental: Option<PathBuf>

If Some, enable incremental compilation, using the given directory to store intermediate results.

debugging_opts: DebuggingOptions

prints: Vec<PrintRequest>

borrowck_mode: BorrowckMode

Determines which borrow checker(s) to run. This is the parsed, sanitized version of debugging_opts.borrowck, which is just a plain string.

cg: CodegenOptions

externs: Externs

extern_dep_specs: ExternDepSpecs

crate_name: Option<String>

alt_std_name: Option<String>

An optional name to use as the crate for std during std injection, written extern crate name as std. Defaults to std. Used by out-of-tree drivers.

unstable_features: UnstableFeatures

Indicates how the compiler should treat unstable features.

actually_rustdoc: bool

Indicates whether this run of the compiler is actually rustdoc. This is currently just a hack and will be removed eventually, so please try to not rely on this too much.

trimmed_def_paths: TrimmedDefPaths

Control path trimming.

cli_forced_codegen_units: Option<usize>

Specifications of codegen units / ThinLTO which are forced as a result of parsing command line options. These are not necessarily what rustc was invoked with, but massaged a bit to agree with commands like --emit llvm-ir which they’re often incompatible with if we otherwise use the defaults of rustc.

cli_forced_thinlto_off: bool

remap_path_prefix: Vec<(PathBuf, PathBuf)>

Remap source path prefixes in all output (messages, object files, debug, etc.).

real_rust_source_base_dir: Option<PathBuf>

Base directory containing the src/ for the Rust standard library, and potentially rustc as well, if we can can find it. Right now it’s always $sysroot/lib/rustlib/src/rust (i.e. the rustup rust-src component).

This directory is what the virtual /rustc/$hash is translated back to, if Rust was built with path remapping to /rustc/$hash enabled (the rust.remap-debuginfo option in config.toml).

edition: Edition

json_artifact_notifications: bool

true if we’re emitting JSON blobs about each artifact produced by the compiler.

json_unused_externs: bool

true if we’re emitting a JSON blob containing the unused externs

pretty: Option<PpMode>

working_dir: RealFileName

The (potentially remapped) working directory

Implementations

impl Options

pub fn build_dep_graph(&self) -> bool

Returns true if there is a reason to build the dep graph.

pub fn file_path_mapping(&self) -> FilePathMapping

pub fn will_create_output_file(&self) -> bool

Returns true if there will be an output file generated.

pub fn share_generics(&self) -> bool

impl Options

pub fn dep_tracking_hash(&self, for_crate_hash: bool) -> u64

Trait Implementations

impl Clone for Options

fn clone(&self) -> Options

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for Options

fn default() -> Options

Returns the “default value” for a type.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 1728 bytes