Module syntax::ext::base [−] [src]

🔬 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?

Reexports

pub use self::SyntaxExtension::*;

DummyResolver	[ Experimental ]
DummyResult	[ Experimental ] Fill-in macro expansion result, to allow compilation to continue after hitting errors.
ExpansionData	[ Experimental ]
ExtCtxt	[ Experimental ] One of these is made during expansion and incrementally updated as we go; when a macro expansion occurs, the resulting nodes have the `backtrace() -> expn_info` of their expansion context stored into their span.
MacEager	[ Experimental ] `MacResult` implementation for the common case where you've already built each form of AST that you might return.
ModuleData	[ Experimental ]

Annotatable	[ Experimental ]
Determinacy	[ Experimental ]
MacroKind	[ Experimental ] Represents different kinds of macro invocations that can be resolved.
SyntaxExtension	[ Experimental ] An enum representing the different kinds of syntax extensions.

AttrProcMacro	[ Experimental ]
IdentMacroExpander	[ Experimental ]
MacResult	[ Experimental ] The result of a macro expansion. The return values of the various methods are spliced into the AST at the callsite of the macro.
MultiItemDecorator	[ Experimental ]
MultiItemModifier	[ Experimental ]
ProcMacro	[ Experimental ]
Resolver	[ Experimental ]
TTMacroExpander	[ Experimental ] Represents a thing that maps token trees to Macro Results

check_zero_tts	[ Experimental ] Non-fatally assert that `tts` is empty. Note that this function returns even when `tts` is non-empty, macros that need to stop compilation should call `cx.parse_sess.span_diagnostic.abort_if_errors()` (this should be done as rarely as possible).
expr_to_spanned_string	[ Experimental ] Extract a string literal from the macro expanded version of `expr`, emitting `err_msg` if `expr` is not a string literal. This does not stop compilation on error, merely emits a non-fatal error and returns None.
expr_to_string	[ Experimental ]
get_exprs_from_tts	[ Experimental ] Extract comma-separated expressions from `tts`. If there is a parsing error, emit a non-fatal error and return None.
get_single_str_from_tts	[ Experimental ] Extract the string literal from the first token of `tts`. If this is not a string literal, emit an error and return None.