Struct rustc::session::Session

pub struct Session {
    pub target: Config,
    pub host: Target,
    pub opts: Options,
    pub parse_sess: ParseSess,
    pub entry_fn: RefCell<Option<(NodeId, Span)>>,
    pub entry_type: Cell<Option<EntryFnType>>,
    pub plugin_registrar_fn: Cell<Option<NodeId>>,
    pub derive_registrar_fn: Cell<Option<NodeId>>,
    pub default_sysroot: Option<PathBuf>,
    pub local_crate_source_file: Option<PathBuf>,
    pub working_dir: (PathBuf, bool),
    pub lint_store: RefCell<LintStore>,
    pub buffered_lints: RefCell<Option<LintBuffer>>,
    pub one_time_diagnostics: RefCell<FxHashSet<(DiagnosticMessageId, Option<Span>, String)>>,
    pub plugin_llvm_passes: RefCell<Vec<String>>,
    pub plugin_attributes: RefCell<Vec<(String, AttributeType)>>,
    pub crate_types: RefCell<Vec<CrateType>>,
    pub dependency_formats: RefCell<Dependencies>,
    pub crate_disambiguator: RefCell<Option<CrateDisambiguator>>,
    pub features: RefCell<Features>,
    pub recursion_limit: Cell<usize>,
    pub type_length_limit: Cell<usize>,
    pub injected_allocator: Cell<Option<CrateNum>>,
    pub allocator_kind: Cell<Option<AllocatorKind>>,
    pub injected_panic_runtime: Cell<Option<CrateNum>>,
    pub imported_macro_spans: RefCell<HashMap<Span, (String, Span)>>,
    pub perf_stats: PerfStats,
    pub code_stats: RefCell<CodeStats>,
    pub print_fuel_crate: Option<String>,
    pub print_fuel: Cell<u64>,
    pub jobserver_from_env: Option<Client>,
    pub has_global_allocator: Cell<bool>,
    // some fields omitted
}

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Represents the data associated with a compilation session for a single crate.

Fields

target: Config

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host: Target

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opts: Options

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parse_sess: ParseSess

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entry_fn: RefCell<Option<(NodeId, Span)>>

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For a library crate, this is always none

entry_type: Cell<Option<EntryFnType>>

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plugin_registrar_fn: Cell<Option<NodeId>>

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derive_registrar_fn: Cell<Option<NodeId>>

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default_sysroot: Option<PathBuf>

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local_crate_source_file: Option<PathBuf>

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The name of the root source file of the crate, in the local file system. None means that there is no source file.

working_dir: (PathBuf, bool)

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The directory the compiler has been executed in plus a flag indicating if the value stored here has been affected by path remapping.

lint_store: RefCell<LintStore>

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buffered_lints: RefCell<Option<LintBuffer>>

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one_time_diagnostics: RefCell<FxHashSet<(DiagnosticMessageId, Option<Span>, String)>>

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Set of (DiagnosticId, Option, message) tuples tracking (sub)diagnostics that have been set once, but should not be set again, in order to avoid redundantly verbose output (Issue #24690, #44953).

plugin_llvm_passes: RefCell<Vec<String>>

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plugin_attributes: RefCell<Vec<(String, AttributeType)>>

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crate_types: RefCell<Vec<CrateType>>

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dependency_formats: RefCell<Dependencies>

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crate_disambiguator: RefCell<Option<CrateDisambiguator>>

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The crate_disambiguator is constructed out of all the -C metadata arguments passed to the compiler. Its value together with the crate-name forms a unique global identifier for the crate. It is used to allow multiple crates with the same name to coexist. See the trans::back::symbol_names module for more information.

features: RefCell<Features>

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recursion_limit: Cell<usize>

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The maximum recursion limit for potentially infinitely recursive operations such as auto-dereference and monomorphization.

type_length_limit: Cell<usize>

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The maximum length of types during monomorphization.

injected_allocator: Cell<Option<CrateNum>>

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The metadata::creader module may inject an allocator/panic_runtime dependency if it didn't already find one, and this tracks what was injected.

allocator_kind: Cell<Option<AllocatorKind>>

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injected_panic_runtime: Cell<Option<CrateNum>>

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imported_macro_spans: RefCell<HashMap<Span, (String, Span)>>

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Map from imported macro spans (which consist of the localized span for the macro body) to the macro name and definition span in the source crate.

perf_stats: PerfStats

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Some measurements that are being gathered during compilation.

code_stats: RefCell<CodeStats>

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Data about code being compiled, gathered during compilation.

print_fuel_crate: Option<String>

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If -zprint-fuel=crate, Some(crate).

print_fuel: Cell<u64>

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Always set to zero and incremented so that we can print fuel expended by a crate.

jobserver_from_env: Option<Client>

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Loaded up early on in the initialization of this Session to avoid false positives about a job server in our environment.

has_global_allocator: Cell<bool>

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Metadata about the allocators for the current crate being compiled

Methods

impl Session

pub fn local_crate_disambiguator(&self) -> CrateDisambiguator

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pub fn struct_span_warn<'a, S: Into<MultiSpan>>(
    &'a self,
    sp: S,
    msg: &str
) -> DiagnosticBuilder<'a>

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pub fn struct_span_warn_with_code<'a, S: Into<MultiSpan>>(
    &'a self,
    sp: S,
    msg: &str,
    code: DiagnosticId
) -> DiagnosticBuilder<'a>

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pub fn struct_warn<'a>(&'a self, msg: &str) -> DiagnosticBuilder<'a>

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pub fn struct_span_err<'a, S: Into<MultiSpan>>(
    &'a self,
    sp: S,
    msg: &str
) -> DiagnosticBuilder<'a>

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pub fn struct_span_err_with_code<'a, S: Into<MultiSpan>>(
    &'a self,
    sp: S,
    msg: &str,
    code: DiagnosticId
) -> DiagnosticBuilder<'a>

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pub fn struct_err<'a>(&'a self, msg: &str) -> DiagnosticBuilder<'a>

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pub fn struct_err_with_code<'a>(
    &'a self,
    msg: &str,
    code: DiagnosticId
) -> DiagnosticBuilder<'a>

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pub fn struct_span_fatal<'a, S: Into<MultiSpan>>(
    &'a self,
    sp: S,
    msg: &str
) -> DiagnosticBuilder<'a>

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pub fn struct_span_fatal_with_code<'a, S: Into<MultiSpan>>(
    &'a self,
    sp: S,
    msg: &str,
    code: DiagnosticId
) -> DiagnosticBuilder<'a>

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pub fn struct_fatal<'a>(&'a self, msg: &str) -> DiagnosticBuilder<'a>

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pub fn span_fatal<S: Into<MultiSpan>>(&self, sp: S, msg: &str) -> !

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pub fn span_fatal_with_code<S: Into<MultiSpan>>(
    &self,
    sp: S,
    msg: &str,
    code: DiagnosticId
) -> !

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pub fn fatal(&self, msg: &str) -> !

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pub fn span_err_or_warn<S: Into<MultiSpan>>(
    &self,
    is_warning: bool,
    sp: S,
    msg: &str
)

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pub fn span_err<S: Into<MultiSpan>>(&self, sp: S, msg: &str)

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pub fn span_err_with_code<S: Into<MultiSpan>>(
    &self,
    sp: S,
    msg: &str,
    code: DiagnosticId
)

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pub fn err(&self, msg: &str)

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pub fn err_count(&self) -> usize

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pub fn has_errors(&self) -> bool

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pub fn abort_if_errors(&self)

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pub fn compile_status(&self) -> Result<(), CompileIncomplete>

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pub fn track_errors<F, T>(&self, f: F) -> Result<T, ErrorReported> where
    F: FnOnce() -> T, 

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pub fn span_warn<S: Into<MultiSpan>>(&self, sp: S, msg: &str)

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pub fn span_warn_with_code<S: Into<MultiSpan>>(
    &self,
    sp: S,
    msg: &str,
    code: DiagnosticId
)

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pub fn warn(&self, msg: &str)

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pub fn opt_span_warn<S: Into<MultiSpan>>(&self, opt_sp: Option<S>, msg: &str)

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pub fn delay_span_bug<S: Into<MultiSpan>>(&self, sp: S, msg: &str)

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Delay a span_bug() call until abort_if_errors()

pub fn note_without_error(&self, msg: &str)

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pub fn span_note_without_error<S: Into<MultiSpan>>(&self, sp: S, msg: &str)

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pub fn span_unimpl<S: Into<MultiSpan>>(&self, sp: S, msg: &str) -> !

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pub fn unimpl(&self, msg: &str) -> !

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pub fn buffer_lint<S: Into<MultiSpan>>(
    &self,
    lint: &'static Lint,
    id: NodeId,
    sp: S,
    msg: &str
)

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pub fn reserve_node_ids(&self, count: usize) -> NodeId

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pub fn next_node_id(&self) -> NodeId

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pub fn diagnostic<'a>(&'a self) -> &'a Handler

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pub fn diag_span_note_once<'a, 'b>(
    &'a self,
    diag_builder: &'b mut DiagnosticBuilder<'a>,
    msg_id: DiagnosticMessageId,
    span: Span,
    message: &str
)

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pub fn diag_note_once<'a, 'b>(
    &'a self,
    diag_builder: &'b mut DiagnosticBuilder<'a>,
    msg_id: DiagnosticMessageId,
    message: &str
)

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pub fn diag_span_suggestion_once<'a, 'b>(
    &'a self,
    diag_builder: &'b mut DiagnosticBuilder<'a>,
    msg_id: DiagnosticMessageId,
    span: Span,
    message: &str,
    suggestion: String
)

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pub fn codemap<'a>(&'a self) -> &'a CodeMap

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pub fn verbose(&self) -> bool

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pub fn time_passes(&self) -> bool

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pub fn profile_queries(&self) -> bool

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pub fn profile_queries_and_keys(&self) -> bool

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pub fn count_llvm_insns(&self) -> bool

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pub fn time_llvm_passes(&self) -> bool

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pub fn trans_stats(&self) -> bool

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pub fn meta_stats(&self) -> bool

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pub fn asm_comments(&self) -> bool

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pub fn no_verify(&self) -> bool

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pub fn borrowck_stats(&self) -> bool

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pub fn print_llvm_passes(&self) -> bool

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pub fn emit_end_regions(&self) -> bool

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pub fn lto(&self) -> bool

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pub fn panic_strategy(&self) -> PanicStrategy

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Returns the panic strategy for this compile session. If the user explicitly selected one using '-C panic', use that, otherwise use the panic strategy defined by the target.

pub fn linker_flavor(&self) -> LinkerFlavor

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn no_landing_pads(&self) -> bool

🔬 This is a nightly-only experimental API. (rustc_private)

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pub fn unstable_options(&self) -> bool

🔬 This is a nightly-only experimental API. (rustc_private)

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pub fn nonzeroing_move_hints(&self) -> bool

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn overflow_checks(&self) -> bool

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn crt_static(&self) -> bool

🔬 This is a nightly-only experimental API. (rustc_private)

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pub fn crt_static_feature(&self) -> bool

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn must_not_eliminate_frame_pointers(&self) -> bool

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn generate_plugin_registrar_symbol(
    &self,
    disambiguator: CrateDisambiguator,
    index: DefIndex
) -> String

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Returns the symbol name for the registrar function, given the crate Svh and the function DefIndex.

pub fn generate_derive_registrar_symbol(
    &self,
    disambiguator: CrateDisambiguator,
    index: DefIndex
) -> String

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn sysroot<'a>(&'a self) -> &'a Path

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn target_filesearch(&self, kind: PathKind) -> FileSearch

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn host_filesearch(&self, kind: PathKind) -> FileSearch

🔬 This is a nightly-only experimental API. (rustc_private)

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pub fn set_incr_session_load_dep_graph(&self, load: bool)

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn incr_session_load_dep_graph(&self) -> bool

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn init_incr_comp_session(
    &self,
    session_dir: PathBuf,
    lock_file: Lock,
    load_dep_graph: bool
)

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn finalize_incr_comp_session(&self, new_directory_path: PathBuf)

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn mark_incr_comp_session_as_invalid(&self)

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn incr_comp_session_dir(&self) -> Ref<PathBuf>

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn incr_comp_session_dir_opt(&self) -> Option<Ref<PathBuf>>

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn print_perf_stats(&self)

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

pub fn consider_optimizing<T: Fn() -> String>(
    &self,
    crate_name: &str,
    msg: T
) -> bool

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

We want to know if we're allowed to do an optimization for crate foo from -z fuel=foo=n. This expends fuel if applicable, and records fuel if applicable.

pub fn codegen_units(&self) -> usize

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Returns the number of codegen units that should be used for this compilation

pub fn thinlto(&self) -> bool

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Returns whether ThinLTO is enabled for this compilation