fn check_trait_fn_not_const(&self, constness: Const) {
if let Const::Yes(span) = constness {
- struct_span_err!(
- self.session,
- span,
- E0379,
- "functions in traits cannot be declared const"
- )
- .span_label(span, "functions in traits cannot be const")
- .emit();
+ self.session.emit_err(TraitFnConst { span });
}
}
GenericParamKind::Lifetime { .. } => {
if !param.bounds.is_empty() {
let spans: Vec<_> = param.bounds.iter().map(|b| b.span()).collect();
- self.err_handler()
- .span_err(spans, "lifetime bounds cannot be used in this context");
+ self.session.emit_err(ForbiddenLifetimeBound { spans });
}
None
}
})
.collect();
if !non_lt_param_spans.is_empty() {
- self.err_handler().span_err(
- non_lt_param_spans,
- "only lifetime parameters can be used in this context",
- );
+ self.session.emit_err(ForbiddenNonLifetimeParam { spans: non_lt_param_spans });
}
}
let max_num_args: usize = u16::MAX.into();
if fn_decl.inputs.len() > max_num_args {
let Param { span, .. } = fn_decl.inputs[0];
- self.err_handler().span_fatal(
- span,
- &format!("function can not have more than {} arguments", max_num_args),
- );
+ self.session.emit_fatal(FnParamTooMany { span, max_num_args });
}
}
match &*fn_decl.inputs {
[Param { ty, span, .. }] => {
if let TyKind::CVarArgs = ty.kind {
- self.err_handler().span_err(
- *span,
- "C-variadic function must be declared with at least one named argument",
- );
+ self.session.emit_err(FnParamCVarArgsOnly { span: *span });
}
}
[ps @ .., _] => {
for Param { ty, span, .. } in ps {
if let TyKind::CVarArgs = ty.kind {
- self.err_handler().span_err(
- *span,
- "`...` must be the last argument of a C-variadic function",
- );
+ self.session.emit_err(FnParamCVarArgsNotLast { span: *span });
}
}
}
})
.for_each(|attr| {
if attr.is_doc_comment() {
- self.err_handler()
- .struct_span_err(
- attr.span,
- "documentation comments cannot be applied to function parameters",
- )
- .span_label(attr.span, "doc comments are not allowed here")
- .emit();
+ self.session.emit_err(FnParamDocComment { span: attr.span });
} else {
- self.err_handler().span_err(
- attr.span,
- "allow, cfg, cfg_attr, deny, expect, \
- forbid, and warn are the only allowed built-in attributes in function parameters",
- );
+ self.session.emit_err(FnParamForbiddenAttr { span: attr.span });
}
});
}
fn check_decl_self_param(&self, fn_decl: &FnDecl, self_semantic: SelfSemantic) {
if let (SelfSemantic::No, [param, ..]) = (self_semantic, &*fn_decl.inputs) {
if param.is_self() {
- self.err_handler()
- .struct_span_err(
- param.span,
- "`self` parameter is only allowed in associated functions",
- )
- .span_label(param.span, "not semantically valid as function parameter")
- .note("associated functions are those in `impl` or `trait` definitions")
- .emit();
+ self.session.emit_err(FnParamForbiddenSelf { span: param.span });
}
}
}