Module syntax::ext::baseExperimental [-] [+] [src]

Reexports

pub use self::SyntaxExtension::*;

BlockInfo
DummyResult	Fill-in macro expansion result, to allow compilation to continue after hitting errors.
ExtCtxt	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.
MacExpr	A convenience type for macros that return a single expression.
MacItems	A type for macros that return multiple items.
MacPat	A convenience type for macros that return a single pattern.
MacroDef
SyntaxEnv	In order to have some notion of scoping for macros, we want to implement the notion of a transformation environment.

An enum representing the different kinds of syntax extensions.

IdentMacroExpander
ItemDecorator
ItemModifier
MacResult	The result of a macro expansion. The return values of the various methods are spliced into the AST at the callsite of the macro (or just into the compiler's internal macro table, for `make_def`).
TTMacroExpander	Represents a thing that maps token trees to Macro Results

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