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[Macros] Always parse macro expansions, diagnose later

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Always parse macro expansions, regardless of language mode, and
eliminate the fallback path for very, very, very old object literals
like `#Color`. Instead, check for the feature flag for macro
declaration and at macro expansion time, since this is a semantic
restriction.

While here, refactor things so the vast majority of the macro-handling
logic still applies even if the Swift Swift parser is disabled. Only
attempts to expand the macro will fail. This allows us to enable the
macro-diagnostics test everywhere.
This commit is contained in:
Doug Gregor
2022-12-23 23:22:21 -08:00
parent 71ca9c86e6
commit 6bb9cb8b5d
20 changed files with 105 additions and 217 deletions
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2
test/ModuleInterface/unbuildable.swift
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@@ -22,7 +22,7 @@
// RUN: not %target-swift-frontend -typecheck-module-from-interface %t/UnbuildableCurrent.swiftinterface 2>&1 | %FileCheck -check-prefixes=ALL,CURRENT-VERIFY %s
// RUN: not %target-swift-frontend -typecheck-module-from-interface %t/UnbuildableFuture.swiftinterface 2>&1 | %FileCheck -check-prefixes=ALL,FUTURE-VERIFY %s
// ALL: Unbuildable{{[^.]+}}.swiftinterface:{{[0-9]+}}:{{[0-9]+}}: error: use of unknown directive '#somethingYouveNeverHeardOf'
// ALL: Unbuildable{{[^.]+}}.swiftinterface:{{[0-9]+}}:{{[0-9]+}}: error: no macro named 'somethingYouveNeverHeardOf'
#if CURRENT
import UnbuildableCurrent