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78b89b201c
This started out as a crash, where an expression macro could not be defined in terms of one of the builtin macros (e.g., `#line`), because we were expecting a macro expansion expression but didn't get one. Easy fix. However, this uncovered a second bug, which is that we couldn't handle an expression macro expansino to `#line`. This is because we were parsing the macro expansion buffer as "top level items", which treats `#line` at the start of a line as a deprecated alias of `#sourceLocation`. Switch over to parsing a single expression in these contexts, and fix up an issue where `#isolation` didn't even have that expression. Fixes rdar://139372780.
45 lines
1.6 KiB
Swift
45 lines
1.6 KiB
Swift
// Expanding macros that are defined in terms of other macros.
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// RUN: %empty-directory(%t)
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// RUN: %host-build-swift -swift-version 5 -emit-library -o %t/%target-library-name(MacroDefinition) -parse-as-library -module-name=MacroDefinition %S/Inputs/syntax_macro_definitions.swift
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// Diagnostics testing
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// RUN: %target-typecheck-verify-swift -swift-version 5 -load-plugin-library %t/%target-library-name(MacroDefinition) -module-name MacroUser -DTEST_DIAGNOSTICS
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// Execution testing
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// RUN: %target-build-swift -swift-version 5 -load-plugin-library %t/%target-library-name(MacroDefinition) %s -o %t/main -module-name MacroUser
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// RUN: %target-codesign %t/main
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// RUN: %target-run %t/main | %FileCheck %s
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// REQUIRES: swift_swift_parser, executable_test
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@freestanding(expression) macro stringify<T>(_ value: T) -> (T, String) = #externalMacro(module: "MacroDefinition", type: "StringifyMacro")
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@freestanding(expression) macro stringifySeven() -> (Int, String) = #stringify(7)
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@freestanding(expression) macro recurse(_: Bool) = #externalMacro(module: "MacroDefinition", type: "RecursiveMacro")
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@freestanding(expression) macro recurseThrough(_ value: Bool) = #recurse(value)
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func testFreestandingExpansionOfOther() {
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// CHECK: ---testFreestandingExpansionOfOther
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print("---testFreestandingExpansionOfOther")
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// CHECK-NEXT: (7, "7")
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print(#stringifySeven)
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#recurseThrough(false)
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#if TEST_DIAGNOSTICS
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#recurseThrough(true)
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// expected-note@-1 {{in expansion of macro 'recurseThrough' here}}
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#endif
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}
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@freestanding(expression)
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macro myLineMacro() -> Int = #line
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var thisLine = #myLineMacro
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testFreestandingExpansionOfOther()
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