[−][src]Module syntax::ext::base

Structs

DummyResult	Fill-in macro expansion result, to allow compilation to continue after hitting errors.
ExpansionData
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_data` of their expansion context stored into their span.
Indeterminate	Error type that denotes indeterminacy.
MacEager	`MacResult` implementation for the common case where you've already built each form of AST that you might return.
ModuleData
SpecialDerives	Built-in derives that need some extra tracking beyond the usual macro functionality.
SyntaxExtension	A struct representing a macro definition in "lowered" form ready for expansion.

Annotatable
InvocationRes	Result of resolving a macro invocation.
MacroKind	The kind of macro invocation or definition.
SyntaxExtensionKind	A syntax extension kind.

AttrProcMacro
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.
MultiItemModifier
ProcMacro
Resolver
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_spanned_string	Extracts 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
get_exprs_from_tts	Extracts comma-separated expressions from `tts`. If there is a parsing error, emit a non-fatal error and return `None`.
get_single_str_from_tts	Interpreting `tts` as a comma-separated sequence of expressions, expect exactly one string literal, or emit an error and return `None`.

MacroExpanderFn
NamedSyntaxExtension