Module syntax::ext::base [−] [src]

Unstable (rustc_private)

Reexports

pub use self::SyntaxExtension::*;

BlockInfo	[Unstable]
DummyResult	[Unstable] Fill-in macro expansion result, to allow compilation to continue after hitting errors.
ExtCtxt	[Unstable] 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	[Unstable] `MacResult` implementation for the common case where you've already built each form of AST that you might return.
SyntaxEnv	[Unstable] In order to have some notion of scoping for macros, we want to implement the notion of a transformation environment.

Annotatable	[Unstable]
SyntaxExtension	[Unstable] An enum representing the different kinds of syntax extensions.

IdentMacroExpander	[Unstable]
MacResult	[Unstable] 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	[Unstable]
MultiItemModifier	[Unstable]
TTMacroExpander	[Unstable] Represents a thing that maps token trees to Macro Results

check_zero_tts	[Unstable] 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_string	[Unstable] 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.
get_exprs_from_tts	[Unstable] 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	[Unstable] Extract the string literal from the first token of `tts`. If this is not a string literal, emit an error and return None.