bjoernager/rust
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Add feature gates for f16 and f128

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Includes related tests and documentation pages.

Michael Goulet: Don't issue feature error in resolver for f16/f128
unless finalize

Co-authored-by: Michael Goulet <michael@errs.io>
This commit is contained in:
Trevor Gross 2024-03-02 21:45:23 -05:00
parent dc65095298
commit e782d27ec6
11 changed files with 252 additions and 2 deletions
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13
compiler/rustc_ast_passes/src/feature_gate.rs
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@ -1,7 +1,7 @@
use rustc_ast as ast;
use rustc_ast::visit::{self, AssocCtxt, FnCtxt, FnKind, Visitor};
use rustc_ast::{attr, AssocConstraint, AssocConstraintKind, NodeId};
use rustc_ast::{PatKind, RangeEnd};
use rustc_ast::{token, PatKind, RangeEnd};
use rustc_feature::{AttributeGate, BuiltinAttribute, Features, GateIssue, BUILTIN_ATTRIBUTE_MAP};
use rustc_session::parse::{feature_err, feature_err_issue, feature_warn};
use rustc_session::Session;
@ -378,6 +378,17 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
ast::ExprKind::TryBlock(_) => {
gate!(&self, try_blocks, e.span, "`try` expression is experimental");
}
ast::ExprKind::Lit(token::Lit { kind: token::LitKind::Float, suffix, .. }) => {
match suffix {
Some(sym::f16) => {
gate!(&self, f16, e.span, "the type `f16` is unstable")
}
Some(sym::f128) => {
gate!(&self, f128, e.span, "the type `f128` is unstable")
}
_ => (),
}
}
_ => {}
}
visit::walk_expr(self, e)