Rename all ParseSess variables/fields/lifetimes as psess.

Existing names for values of this type are `sess`, `parse_sess`,
`parse_session`, and `ps`. `sess` is particularly annoying because
that's also used for `Session` values, which are often co-located, and
it can be difficult to know which type a value named `sess` refers to.
(That annoyance is the main motivation for this change.) `psess` is nice
and short, which is good for a name used this much.

The commit also renames some `parse_sess_created` values as
`psess_created`.

Author: nnethercote

compiler/rustc_ast_lowering/src/expr.rs

@@ -125,12 +125,8 @@ impl<'hir> LoweringContext<'_, 'hir> {
                     let lit_kind = match LitKind::from_token_lit(*token_lit) {
                         Ok(lit_kind) => lit_kind,
                         Err(err) => {
-                            let guar = report_lit_error(
-                                &self.tcx.sess.parse_sess,
-                                err,
-                                *token_lit,
-                                e.span,
-                            );
+                            let guar =
+                                report_lit_error(&self.tcx.sess.psess, err, *token_lit, e.span);
                             LitKind::Err(guar)
                         }
                     };
@@ -721,7 +717,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
                         sym::track_caller,
                         span,
                     )))),
-                    id: self.tcx.sess.parse_sess.attr_id_generator.mk_attr_id(),
+                    id: self.tcx.sess.psess.attr_id_generator.mk_attr_id(),
                     style: AttrStyle::Outer,
                     span: unstable_span,
                 }],
@@ -1756,7 +1752,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
 
         // `#[allow(unreachable_code)]`
         let attr = attr::mk_attr_nested_word(
-            &self.tcx.sess.parse_sess.attr_id_generator,
+            &self.tcx.sess.psess.attr_id_generator,
             AttrStyle::Outer,
             sym::allow,
             sym::unreachable_code,

compiler/rustc_ast_passes/src/ast_validation.rs

@@ -835,7 +835,7 @@ fn validate_generic_param_order(
 
 impl<'a> Visitor<'a> for AstValidator<'a> {
     fn visit_attribute(&mut self, attr: &Attribute) {
-        validate_attr::check_attr(&self.session.parse_sess, attr);
+        validate_attr::check_attr(&self.session.psess, attr);
     }
 
     fn visit_ty(&mut self, ty: &'a Ty) {

compiler/rustc_ast_passes/src/feature_gate.rs

@@ -507,7 +507,7 @@ pub fn check_crate(krate: &ast::Crate, sess: &Session, features: &Features) {
     check_incompatible_features(sess, features);
     let mut visitor = PostExpansionVisitor { sess, features };
 
-    let spans = sess.parse_sess.gated_spans.spans.borrow();
+    let spans = sess.psess.gated_spans.spans.borrow();
     macro_rules! gate_all {
         ($gate:ident, $msg:literal) => {
             if let Some(spans) = spans.get(&sym::$gate) {

compiler/rustc_attr/src/builtin.rs

@@ -524,9 +524,9 @@ pub fn cfg_matches(
 ) -> bool {
     eval_condition(cfg, sess, features, &mut |cfg| {
         try_gate_cfg(cfg.name, cfg.span, sess, features);
-        match sess.parse_sess.check_config.expecteds.get(&cfg.name) {
+        match sess.psess.check_config.expecteds.get(&cfg.name) {
             Some(ExpectedValues::Some(values)) if !values.contains(&cfg.value) => {
-                sess.parse_sess.buffer_lint_with_diagnostic(
+                sess.psess.buffer_lint_with_diagnostic(
                     UNEXPECTED_CFGS,
                     cfg.span,
                     lint_node_id,
@@ -541,8 +541,8 @@ pub fn cfg_matches(
                     ),
                 );
             }
-            None if sess.parse_sess.check_config.exhaustive_names => {
-                sess.parse_sess.buffer_lint_with_diagnostic(
+            None if sess.psess.check_config.exhaustive_names => {
+                sess.psess.buffer_lint_with_diagnostic(
                     UNEXPECTED_CFGS,
                     cfg.span,
                     lint_node_id,
@@ -555,7 +555,7 @@ pub fn cfg_matches(
             }
             _ => { /* not unexpected */ }
         }
-        sess.parse_sess.config.contains(&(cfg.name, cfg.value))
+        sess.psess.config.contains(&(cfg.name, cfg.value))
     })
 }
 
@@ -598,7 +598,7 @@ pub fn eval_condition(
     features: Option<&Features>,
     eval: &mut impl FnMut(Condition) -> bool,
 ) -> bool {
-    let dcx = &sess.parse_sess.dcx;
+    let dcx = &sess.psess.dcx;
     match &cfg.kind {
         ast::MetaItemKind::List(mis) if cfg.name_or_empty() == sym::version => {
             try_gate_cfg(sym::version, cfg.span, sess, features);
@@ -626,7 +626,7 @@ pub fn eval_condition(
             };
 
             // See https://github.com/rust-lang/rust/issues/64796#issuecomment-640851454 for details
-            if sess.parse_sess.assume_incomplete_release {
+            if sess.psess.assume_incomplete_release {
                 RustcVersion::CURRENT > min_version
             } else {
                 RustcVersion::CURRENT >= min_version

compiler/rustc_builtin_macros/src/asm.rs

@@ -45,7 +45,7 @@ pub fn parse_asm_args<'a>(
     sp: Span,
     is_global_asm: bool,
 ) -> PResult<'a, AsmArgs> {
-    let dcx = &p.sess.dcx;
+    let dcx = &p.psess.dcx;
 
     if p.token == token::Eof {
         return Err(dcx.create_err(errors::AsmRequiresTemplate { span: sp }));
@@ -296,7 +296,7 @@ pub fn parse_asm_args<'a>(
 fn err_duplicate_option(p: &mut Parser<'_>, symbol: Symbol, span: Span) {
     // Tool-only output
     let full_span = if p.token.kind == token::Comma { span.to(p.token.span) } else { span };
-    p.sess.dcx.emit_err(errors::AsmOptAlreadyprovided { span, symbol, full_span });
+    p.psess.dcx.emit_err(errors::AsmOptAlreadyprovided { span, symbol, full_span });
 }
 
 /// Try to set the provided option in the provided `AsmArgs`.
@@ -368,7 +368,7 @@ fn parse_clobber_abi<'a>(p: &mut Parser<'a>, args: &mut AsmArgs) -> PResult<'a,
     p.expect(&token::OpenDelim(Delimiter::Parenthesis))?;
 
     if p.eat(&token::CloseDelim(Delimiter::Parenthesis)) {
-        return Err(p.sess.dcx.create_err(errors::NonABI { span: p.token.span }));
+        return Err(p.psess.dcx.create_err(errors::NonABI { span: p.token.span }));
     }
 
     let mut new_abis = Vec::new();
@@ -379,7 +379,7 @@ fn parse_clobber_abi<'a>(p: &mut Parser<'a>, args: &mut AsmArgs) -> PResult<'a,
             }
             Err(opt_lit) => {
                 let span = opt_lit.map_or(p.token.span, |lit| lit.span);
-                let mut err = p.sess.dcx.struct_span_err(span, "expected string literal");
+                let mut err = p.psess.dcx.struct_span_err(span, "expected string literal");
                 err.span_label(span, "not a string literal");
                 return Err(err);
             }
@@ -495,15 +495,15 @@ fn expand_preparsed_asm(
             };
 
             if template_str.contains(".intel_syntax") {
-                ecx.parse_sess().buffer_lint(
+                ecx.psess().buffer_lint(
                     lint::builtin::BAD_ASM_STYLE,
                     find_span(".intel_syntax"),
                     ecx.current_expansion.lint_node_id,
                     "avoid using `.intel_syntax`, Intel syntax is the default",
                 );
             }
             if template_str.contains(".att_syntax") {
-                ecx.parse_sess().buffer_lint(
+                ecx.psess().buffer_lint(
                     lint::builtin::BAD_ASM_STYLE,
                     find_span(".att_syntax"),
                     ecx.current_expansion.lint_node_id,

compiler/rustc_builtin_macros/src/cfg_accessible.rs

@@ -46,7 +46,7 @@ impl MultiItemModifier for Expander {
     ) -> ExpandResult<Vec<Annotatable>, Annotatable> {
         let template = AttributeTemplate { list: Some("path"), ..Default::default() };
         validate_attr::check_builtin_meta_item(
-            &ecx.sess.parse_sess,
+            &ecx.sess.psess,
             meta_item,
             ast::AttrStyle::Outer,
             sym::cfg_accessible,

compiler/rustc_builtin_macros/src/cfg_eval.rs

@@ -195,8 +195,7 @@ impl CfgEval<'_, '_> {
         // Re-parse the tokens, setting the `capture_cfg` flag to save extra information
         // to the captured `AttrTokenStream` (specifically, we capture
         // `AttrTokenTree::AttributesData` for all occurrences of `#[cfg]` and `#[cfg_attr]`)
-        let mut parser =
-            rustc_parse::stream_to_parser(&self.cfg.sess.parse_sess, orig_tokens, None);
+        let mut parser = rustc_parse::stream_to_parser(&self.cfg.sess.psess, orig_tokens, None);
         parser.capture_cfg = true;
         match parse_annotatable_with(&mut parser) {
             Ok(a) => annotatable = a,

compiler/rustc_builtin_macros/src/cmdline_attrs.rs

@@ -7,10 +7,10 @@ use rustc_ast::{self as ast, AttrItem, AttrStyle};
 use rustc_session::parse::ParseSess;
 use rustc_span::FileName;
 
-pub fn inject(krate: &mut ast::Crate, parse_sess: &ParseSess, attrs: &[String]) {
+pub fn inject(krate: &mut ast::Crate, psess: &ParseSess, attrs: &[String]) {
     for raw_attr in attrs {
         let mut parser = rustc_parse::new_parser_from_source_str(
-            parse_sess,
+            psess,
             FileName::cli_crate_attr_source_code(raw_attr),
             raw_attr.clone(),
         );
@@ -25,12 +25,12 @@ pub fn inject(krate: &mut ast::Crate, parse_sess: &ParseSess, attrs: &[String])
         };
         let end_span = parser.token.span;
         if parser.token != token::Eof {
-            parse_sess.dcx.emit_err(errors::InvalidCrateAttr { span: start_span.to(end_span) });
+            psess.dcx.emit_err(errors::InvalidCrateAttr { span: start_span.to(end_span) });
             continue;
         }
 
         krate.attrs.push(mk_attr(
-            &parse_sess.attr_id_generator,
+            &psess.attr_id_generator,
             AttrStyle::Inner,
             path,
             args,

compiler/rustc_builtin_macros/src/concat.rs

@@ -43,7 +43,7 @@ pub fn expand_concat(
                     guar = Some(guarantee);
                 }
                 Err(err) => {
-                    guar = Some(report_lit_error(&cx.sess.parse_sess, err, token_lit, e.span));
+                    guar = Some(report_lit_error(&cx.sess.psess, err, token_lit, e.span));
                 }
             },
             // We also want to allow negative numeric literals.
@@ -52,7 +52,7 @@ pub fn expand_concat(
                     Ok(LitKind::Int(i, _)) => accumulator.push_str(&format!("-{i}")),
                     Ok(LitKind::Float(f, _)) => accumulator.push_str(&format!("-{f}")),
                     Err(err) => {
-                        guar = Some(report_lit_error(&cx.sess.parse_sess, err, token_lit, e.span));
+                        guar = Some(report_lit_error(&cx.sess.psess, err, token_lit, e.span));
                     }
                     _ => missing_literal.push(e.span),
                 }

compiler/rustc_builtin_macros/src/concat_bytes.rs

@@ -55,7 +55,7 @@ fn invalid_type_err(
         Ok(LitKind::Int(_, _)) => dcx.emit_err(ConcatBytesNonU8 { span }),
         Ok(LitKind::ByteStr(..) | LitKind::Byte(_)) => unreachable!(),
         Ok(LitKind::Err(guar)) => guar,
-        Err(err) => report_lit_error(&cx.sess.parse_sess, err, token_lit, span),
+        Err(err) => report_lit_error(&cx.sess.psess, err, token_lit, span),
     }
 }