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[Compile Time Values] Add syntactic verification of valid expressions in '@const' contexts

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Syntactically verify that initializer expressions of '@const' variables and argument expressions to '@const' parameters consist strictly of syntactically-verifiable set of basic values and operations
This commit is contained in:
Artem Chikin
2025-04-15 15:37:02 -07:00
parent abcc134621
commit d8176a7e89
36 changed files with 582 additions and 18 deletions
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20
test/ConstValues/DiagModulesSyntactic.swift Normal file
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// Constant globals should "work" even when used across files in non-WMO builds.
// REQUIRES: swift_feature_CompileTimeValues
// RUN: %empty-directory(%t)
// RUN: split-file %s %t
// RUN: %target-swift-frontend -emit-module -o %t/MyModule.swiftmodule %t/MyModule.swift -parse-as-library -enable-experimental-feature CompileTimeValues
// RUN: %target-swift-frontend -emit-ir -I %t %t/Main.swift -verify -enable-experimental-feature CompileTimeValues
//--- MyModule.swift
public func foo() -> Int {
return 42
}
//--- Main.swift
import MyModule
@const let constGlobal1: Int = foo()
// expected-error@-1 {{not supported in a '@const' expression}}