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303a3e5824
The Swift 4 Migrator is invoked through either the driver and frontend
with the -update-code flag.
The basic pipeline in the frontend is:
- Perform some list of syntactic fixes (there are currently none).
- Perform N rounds of sema fix-its on the primary input file, currently
set to 7 based on prior migrator seasons. Right now, this is just set
to take any fix-it suggested by the compiler.
- Emit a replacement map file, a JSON file describing replacements to a
file that Xcode knows how to understand.
Currently, the Migrator maintains a history of migration states along
the way for debugging purposes.
- Add -emit-remap frontend option
This will indicate the EmitRemap frontend action.
- Don't fork to a separte swift-update binary.
This is going to be a mode of the compiler, invoked by the same flags.
- Add -disable-migrator-fixits option
Useful for debugging, this skips the phase in the Migrator that
automatically applies fix-its suggested by the compiler.
- Add -emit-migrated-file-path option
This is used for testing/debugging scenarios. This takes the final
migration state's output text and writes it to the file specified
by this option.
- Add -dump-migration-states-dir
This dumps all of the migration states encountered during a migration
run for a file to the given directory. For example, the compiler
fix-it migration pass dumps the input file, the output file, and the
remap file between the two.
State output has the following naming convention:
${Index}-${MigrationPassName}-${What}.${extension}, such as:
1-FixitMigrationState-Input.swift
rdar://problem/30926261
67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
//===--- Semantics.cpp - Semantics manager --------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "swift/Sema/Semantics.h"
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#include "swift/AST/Expr.h"
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#include "swift/AST/Decl.h"
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#include "swift/AST/Stmt.h"
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using namespace swift;
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using namespace swift::sema;
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using namespace swift::syntax;
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void
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Semantics::recordSyntaxMapping(RC<syntax::SyntaxData> FromNode,
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ASTNode ToNode) {
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if (FromNode->getKind() == SyntaxKind::Unknown) {
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return;
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}
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SyntaxMap[FromNode] = ToNode;
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}
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llvm::Optional<ASTNode>
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Semantics::getNodeForSyntax(syntax::Syntax SyntaxNode) const {
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auto Found = SyntaxMap.find(SyntaxNode.Root);
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if (Found == SyntaxMap.end()) {
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return None;
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}
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return Found->getSecond();
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}
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void Semantics::clearSyntaxMap() {
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SyntaxMap.shrink_and_clear();
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}
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void Semantics::dumpSyntaxMap() const {
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for (const auto &SyntaxAndSemaNode : SyntaxMap) {
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auto SyntaxNode = SyntaxAndSemaNode.getFirst();
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auto SemanticNode = SyntaxAndSemaNode.getSecond();
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llvm::errs() << "\n=====================================================\n";
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SyntaxNode->dump(llvm::errs());
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llvm::errs() << "\n\n---- Maps to semantic node: ----\n\n";
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if (SemanticNode.is<Expr *>()) {
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SemanticNode.get<Expr *>()->dump(llvm::errs());
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} else if (SemanticNode.is<Decl *>()) {
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SemanticNode.get<Decl *>()->dump(llvm::errs());
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} else if (SemanticNode.is<Expr *>()) {
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SemanticNode.get<Expr *>()->dump(llvm::errs());
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} else {
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llvm_unreachable("ASTNode has pointer to unknown thing!");
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}
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llvm::errs() << "\n=====================================================\n";
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}
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}
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