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proc_macro: Add an expand_expr method to TokenStream #87264

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Nov 13, 2021
Merged

proc_macro: Add an expand_expr method to TokenStream #87264

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28 changes: 15 additions & 13 deletions compiler/rustc_expand/src/proc_macro.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -24,8 +24,9 @@ impl base::ProcMacro for BangProcMacro {
span: Span,
input: TokenStream,
) -> Result<TokenStream, ErrorReported> {
let proc_macro_backtrace = ecx.ecfg.proc_macro_backtrace;
let server = proc_macro_server::Rustc::new(ecx);
self.client.run(&EXEC_STRATEGY, server, input, ecx.ecfg.proc_macro_backtrace).map_err(|e| {
self.client.run(&EXEC_STRATEGY, server, input, proc_macro_backtrace).map_err(|e| {
let mut err = ecx.struct_span_err(span, "proc macro panicked");
if let Some(s) = e.as_str() {
err.help(&format!("message: {}", s));
Expand All @@ -48,9 +49,10 @@ impl base::AttrProcMacro for AttrProcMacro {
annotation: TokenStream,
annotated: TokenStream,
) -> Result<TokenStream, ErrorReported> {
let proc_macro_backtrace = ecx.ecfg.proc_macro_backtrace;
let server = proc_macro_server::Rustc::new(ecx);
self.client
.run(&EXEC_STRATEGY, server, annotation, annotated, ecx.ecfg.proc_macro_backtrace)
.run(&EXEC_STRATEGY, server, annotation, annotated, proc_macro_backtrace)
.map_err(|e| {
let mut err = ecx.struct_span_err(span, "custom attribute panicked");
if let Some(s) = e.as_str() {
Expand Down Expand Up @@ -97,19 +99,19 @@ impl MultiItemModifier for ProcMacroDerive {
nt_to_tokenstream(&item, &ecx.sess.parse_sess, CanSynthesizeMissingTokens::No)
};

let proc_macro_backtrace = ecx.ecfg.proc_macro_backtrace;
let server = proc_macro_server::Rustc::new(ecx);
let stream =
match self.client.run(&EXEC_STRATEGY, server, input, ecx.ecfg.proc_macro_backtrace) {
Ok(stream) => stream,
Err(e) => {
let mut err = ecx.struct_span_err(span, "proc-macro derive panicked");
if let Some(s) = e.as_str() {
err.help(&format!("message: {}", s));
}
err.emit();
return ExpandResult::Ready(vec![]);
let stream = match self.client.run(&EXEC_STRATEGY, server, input, proc_macro_backtrace) {
Ok(stream) => stream,
Err(e) => {
let mut err = ecx.struct_span_err(span, "proc-macro derive panicked");
if let Some(s) = e.as_str() {
err.help(&format!("message: {}", s));
}
};
err.emit();
return ExpandResult::Ready(vec![]);
}
};

let error_count_before = ecx.sess.parse_sess.span_diagnostic.err_count();
let mut parser =
Expand Down
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