chore: avoid reserved name

TODO: update state0 and cleanup

src/Lean/Elab/Declaration.lean

@@ -42,7 +42,8 @@ private def isNamedDef (stx : Syntax) : Bool :=
     let decl := stx[1]
     let k := decl.getKind
     k == ``Lean.Parser.Command.abbrev ||
-    k == ``Lean.Parser.Command.def ||
+    k == ``Lean.Parser.Command.definition ||
+    k == ``Lean.Parser.Command.def || -- TODO: delete
     k == ``Lean.Parser.Command.theorem ||
     k == ``Lean.Parser.Command.opaque ||
     k == ``Lean.Parser.Command.axiom ||

src/Lean/Elab/DefView.lean

@@ -142,7 +142,8 @@ def mkDefViewOfExample (modifiers : Modifiers) (stx : Syntax) : DefView :=
 def isDefLike (stx : Syntax) : Bool :=
   let declKind := stx.getKind
   declKind == ``Parser.Command.abbrev ||
-  declKind == ``Parser.Command.def ||
+  declKind == ``Parser.Command.definition ||
+  declKind == ``Parser.Command.def || -- TODO: delete
   declKind == ``Parser.Command.theorem ||
   declKind == ``Parser.Command.opaque ||
   declKind == ``Parser.Command.instance ||
@@ -152,7 +153,9 @@ def mkDefView (modifiers : Modifiers) (stx : Syntax) : CommandElabM DefView :=
   let declKind := stx.getKind
   if declKind == ``Parser.Command.«abbrev» then
     return mkDefViewOfAbbrev modifiers stx
-  else if declKind == ``Parser.Command.def then
+  else if declKind == ``Parser.Command.definition then
+    return mkDefViewOfDef modifiers stx
+  else if declKind == ``Parser.Command.def then -- TODO: delete
     return mkDefViewOfDef modifiers stx
   else if declKind == ``Parser.Command.theorem then
     return mkDefViewOfTheorem modifiers stx

src/Lean/Linter/MissingDocs.lean

@@ -123,7 +123,7 @@ def declModifiersPubNoDoc (mods : Syntax) : Bool :=
 
 def lintDeclHead (k : SyntaxNodeKind) (id : Syntax) : CommandElabM Unit := do
   if k == ``«abbrev» then lintNamed id "public abbrev"
-  else if k == ``«def» then lintNamed id "public def"
+  else if k == ``definition then lintNamed id "public def"
   else if k == ``«opaque» then lintNamed id "public opaque"
   else if k == ``«axiom» then lintNamed id "public axiom"
   else if k == ``«inductive» then lintNamed id "public inductive"

src/Lean/Parser/Command.lean

@@ -114,7 +114,9 @@ def «abbrev»         := leading_parser
   "abbrev " >> declId >> ppIndent optDeclSig >> declVal
 def optDefDeriving   :=
   optional (ppDedent ppLine >> atomic ("deriving " >> notSymbol "instance") >> sepBy1 ident ", ")
-def «def»            := leading_parser
+def definition     := leading_parser
+  "def " >> recover declId skipUntilWsOrDelim >> ppIndent optDeclSig >> declVal >> optDefDeriving
+def «def»     := leading_parser -- TODO: delete
   "def " >> recover declId skipUntilWsOrDelim >> ppIndent optDeclSig >> declVal >> optDefDeriving
 def «theorem»        := leading_parser
   "theorem " >> recover declId skipUntilWsOrDelim >> ppIndent declSig >> declVal
@@ -198,7 +200,7 @@ def «structure»          := leading_parser
     optDeriving
 @[builtin_command_parser] def declaration := leading_parser
   declModifiers false >>
-  («abbrev» <|> «def» <|> «theorem» <|> «opaque» <|> «instance» <|> «axiom» <|> «example» <|>
+  («abbrev» <|> definition <|> «def» <|> «theorem» <|> «opaque» <|> «instance» <|> «axiom» <|> «example» <|>
    «inductive» <|> classInductive <|> «structure»)
 @[builtin_command_parser] def «deriving»     := leading_parser
   "deriving " >> "instance " >> derivingClasses >> " for " >> sepBy1 (recover ident skip) ", "

stage0/src/stdlib_flags.h

@@ -8,7 +8,7 @@ options get_default_options() {
     // switch to `true` for ABI-breaking changes affecting meta code
     opts = opts.update({"interpreter", "prefer_native"}, false);
     // switch to `true` for changing built-in parsers used in quotations
-    opts = opts.update({"internal", "parseQuotWithCurrentStage"}, false);
+    opts = opts.update({"internal", "parseQuotWithCurrentStage"}, true);
     // toggling `parseQuotWithCurrentStage` may also require toggling the following option if macros/syntax
     // with custom precheck hooks were affected
     opts = opts.update({"quotPrecheck"}, true);