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//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2023 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for Swift project authors
//
import SwiftSyntax
import SwiftSyntaxMacros
/// Get an expression initializing an instance of ``SourceLocation`` from an
/// arbitrary expression value.
///
/// - Parameters:
/// - expr: The expression value for which an instance of ``SourceLocation``
/// is needed.
/// - context: The macro context in which the expression is being parsed.
///
/// - Returns: An expression value that initializes an instance of
/// ``SourceLocation`` for `expr`.
func createSourceLocationExpr(of expr: some SyntaxProtocol, context: some MacroExpansionContext) -> ExprSyntax {
if expr.isProtocol((any FreestandingMacroExpansionSyntax).self) {
// Freestanding macro expressions can just use __here()
// directly and do not need to talk to the macro context to get source
// location info.
return "Testing.SourceLocation.__here()"
}
// Get the equivalent source location in both `#fileID` and `#filePath` modes.
guard let fileIDSourceLoc: AbstractSourceLocation = context.location(of: expr),
let filePathSourceLoc: AbstractSourceLocation = context.location(of: expr, at: .afterLeadingTrivia, filePathMode: .filePath)
else {
return "Testing.SourceLocation.__here()"
}
return "Testing.SourceLocation(fileID: \(fileIDSourceLoc.file), filePath: \(filePathSourceLoc.file), line: \(fileIDSourceLoc.line), column: \(fileIDSourceLoc.column))"
}
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