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[Parse] Improve macro expansion parsing

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* Unify macro expansion parsing logic between MacroExpansionExpr and
  MacroExpansionDecl
* Diagnose whitespace between '#' and the macro name
* Diagnose keyword as a macro name
This commit is contained in:
Rintaro Ishizaki
2023-05-15 13:30:55 -07:00
parent 23c19333df
commit e3a0f24cfe
9 changed files with 198 additions and 86 deletions
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10
include/swift/Parse/Parser.h
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@@ -1751,6 +1751,16 @@ public:
DeclNameRef parseDeclNameRef(DeclNameLoc &loc, const Diagnostic &diag,
DeclNameOptions flags);
/// Parse macro expansion.
///
/// macro-expansion:
/// '#' identifier generic-arguments? expr-paren? trailing-closure?
ParserStatus parseFreestandingMacroExpansion(
SourceLoc &poundLoc, DeclNameLoc &macroNameLoc, DeclNameRef &macroNameRef,
SourceLoc &leftAngleLoc, SmallVectorImpl<TypeRepr *> &genericArgs,
SourceLoc &rightAngleLoc, ArgumentList *&argList, bool isExprBasic,
const Diagnostic &diag);
ParserResult<Expr> parseExprIdentifier();
Expr *parseExprEditorPlaceholder(Token PlaceholderTok,
Identifier PlaceholderId);