487 lines
17 KiB
Go
487 lines
17 KiB
Go
package checker
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import (
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"strings"
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"github.com/microsoft/typescript-go/internal/ast"
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"github.com/microsoft/typescript-go/internal/core"
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"github.com/microsoft/typescript-go/internal/nodebuilder"
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"github.com/microsoft/typescript-go/internal/printer"
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)
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// TODO: Memoize once per checker to retain threadsafety
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func createPrinterWithDefaults(emitContext *printer.EmitContext) *printer.Printer {
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return printer.NewPrinter(printer.PrinterOptions{}, printer.PrintHandlers{}, emitContext)
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}
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func createPrinterWithRemoveComments(emitContext *printer.EmitContext) *printer.Printer {
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return printer.NewPrinter(printer.PrinterOptions{RemoveComments: true}, printer.PrintHandlers{}, emitContext)
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}
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func createPrinterWithRemoveCommentsOmitTrailingSemicolonNeverAsciiEscape(emitContext *printer.EmitContext) *printer.Printer {
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// TODO: OmitTrailingSemicolon support
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return printer.NewPrinter(printer.PrinterOptions{
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RemoveComments: true,
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NeverAsciiEscape: true,
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}, printer.PrintHandlers{}, emitContext)
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}
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func createPrinterWithRemoveCommentsNeverAsciiEscape(emitContext *printer.EmitContext) *printer.Printer {
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return printer.NewPrinter(printer.PrinterOptions{
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RemoveComments: true,
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NeverAsciiEscape: true,
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}, printer.PrintHandlers{}, emitContext)
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}
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type semicolonRemoverWriter struct {
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hasPendingSemicolon bool
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inner printer.EmitTextWriter
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}
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func (s *semicolonRemoverWriter) commitSemicolon() {
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if s.hasPendingSemicolon {
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s.inner.WriteTrailingSemicolon(";")
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s.hasPendingSemicolon = false
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}
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}
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func (s *semicolonRemoverWriter) Clear() {
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s.inner.Clear()
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}
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func (s *semicolonRemoverWriter) DecreaseIndent() {
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s.commitSemicolon()
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s.inner.DecreaseIndent()
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}
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func (s *semicolonRemoverWriter) GetColumn() core.UTF16Offset {
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return s.inner.GetColumn()
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}
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func (s *semicolonRemoverWriter) GetIndent() int {
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return s.inner.GetIndent()
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}
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func (s *semicolonRemoverWriter) GetLine() int {
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return s.inner.GetLine()
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}
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func (s *semicolonRemoverWriter) GetTextPos() int {
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return s.inner.GetTextPos()
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}
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func (s *semicolonRemoverWriter) HasTrailingComment() bool {
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return s.inner.HasTrailingComment()
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}
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func (s *semicolonRemoverWriter) HasTrailingWhitespace() bool {
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return s.inner.HasTrailingWhitespace()
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}
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func (s *semicolonRemoverWriter) IncreaseIndent() {
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s.commitSemicolon()
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s.inner.IncreaseIndent()
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}
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func (s *semicolonRemoverWriter) IsAtStartOfLine() bool {
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return s.inner.IsAtStartOfLine()
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}
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func (s *semicolonRemoverWriter) RawWrite(s1 string) {
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s.commitSemicolon()
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s.inner.RawWrite(s1)
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}
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func (s *semicolonRemoverWriter) String() string {
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s.commitSemicolon()
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return s.inner.String()
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}
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func (s *semicolonRemoverWriter) Write(s1 string) {
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s.commitSemicolon()
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s.inner.Write(s1)
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}
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func (s *semicolonRemoverWriter) WriteComment(text string) {
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s.commitSemicolon()
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s.inner.WriteComment(text)
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}
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func (s *semicolonRemoverWriter) WriteKeyword(text string) {
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s.commitSemicolon()
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s.inner.WriteKeyword(text)
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}
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func (s *semicolonRemoverWriter) WriteLine() {
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s.commitSemicolon()
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s.inner.WriteLine()
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}
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func (s *semicolonRemoverWriter) WriteLineForce(force bool) {
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s.commitSemicolon()
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s.inner.WriteLineForce(force)
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}
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func (s *semicolonRemoverWriter) WriteLiteral(s1 string) {
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s.commitSemicolon()
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s.inner.WriteLiteral(s1)
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}
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func (s *semicolonRemoverWriter) WriteOperator(text string) {
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s.commitSemicolon()
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s.inner.WriteOperator(text)
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}
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func (s *semicolonRemoverWriter) WriteParameter(text string) {
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s.commitSemicolon()
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s.inner.WriteParameter(text)
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}
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func (s *semicolonRemoverWriter) WriteProperty(text string) {
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s.commitSemicolon()
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s.inner.WriteProperty(text)
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}
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func (s *semicolonRemoverWriter) WritePunctuation(text string) {
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s.commitSemicolon()
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s.inner.WritePunctuation(text)
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}
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func (s *semicolonRemoverWriter) WriteSpace(text string) {
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s.commitSemicolon()
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s.inner.WriteSpace(text)
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}
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func (s *semicolonRemoverWriter) WriteStringLiteral(text string) {
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s.commitSemicolon()
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s.inner.WriteStringLiteral(text)
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}
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func (s *semicolonRemoverWriter) WriteSymbol(text string, symbol *ast.Symbol) {
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s.commitSemicolon()
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s.inner.WriteSymbol(text, symbol)
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}
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func (s *semicolonRemoverWriter) WriteTrailingSemicolon(text string) {
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s.hasPendingSemicolon = true
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}
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func getTrailingSemicolonDeferringWriter(writer printer.EmitTextWriter) printer.EmitTextWriter {
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return &semicolonRemoverWriter{false, writer}
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}
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func (c *Checker) TypeToString(t *Type) string {
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return c.typeToString(t, nil)
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}
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func (c *Checker) typeToString(t *Type, enclosingDeclaration *ast.Node) string {
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return c.typeToStringEx(t, enclosingDeclaration, TypeFormatFlagsAllowUniqueESSymbolType|TypeFormatFlagsUseAliasDefinedOutsideCurrentScope, nil)
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}
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func toNodeBuilderFlags(flags TypeFormatFlags) nodebuilder.Flags {
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return nodebuilder.Flags(flags & TypeFormatFlagsNodeBuilderFlagsMask)
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}
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func (c *Checker) TypeToStringEx(t *Type, enclosingDeclaration *ast.Node, flags TypeFormatFlags, vc *VerbosityContext) string {
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return c.typeToStringEx(t, enclosingDeclaration, flags, vc)
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}
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func (c *Checker) typeToStringEx(t *Type, enclosingDeclaration *ast.Node, flags TypeFormatFlags, vc *VerbosityContext) string {
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// Serialization of types can lead to (lazy) resolution of members, which can cause diagnostics that again require
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// serialization of types. This can potentially result in infinite recursion and stack overflows. To prevent that,
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// after a certain number of recursive invocations the function simply returns "?".
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if c.serializationLevel >= maxSerializationLevel {
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return "?"
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}
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newLine := ""
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if flags&TypeFormatFlagsMultilineObjectLiterals != 0 {
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newLine = "\n"
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}
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writer := printer.NewTextWriter(newLine, 0)
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noTruncation := ((vc == nil || vc.MaxTruncationLength == 0) && c.compilerOptions.NoErrorTruncation == core.TSTrue) || (flags&TypeFormatFlagsNoTruncation != 0)
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combinedFlags := toNodeBuilderFlags(flags) | nodebuilder.FlagsIgnoreErrors
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if noTruncation {
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combinedFlags = combinedFlags | nodebuilder.FlagsNoTruncation
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}
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nodeBuilder, release := c.getNodeBuilder()
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defer release()
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oldVerbosity := nodeBuilder.verbosity
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nodeBuilder.verbosity = vc
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defer func() {
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nodeBuilder.verbosity = oldVerbosity
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}()
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c.serializationLevel++
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typeNode := nodeBuilder.TypeToTypeNode(t, enclosingDeclaration, combinedFlags, nodebuilder.InternalFlagsNone, nil)
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c.serializationLevel--
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if typeNode == nil {
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panic("should always get typenode")
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}
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// The unresolved type gets a synthesized comment on `any` to hint to users that it's not a plain `any`.
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// Otherwise, we always strip comments out.
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var p *printer.Printer
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if t == c.unresolvedType {
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p = createPrinterWithDefaults(nodeBuilder.EmitContext())
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} else {
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p = createPrinterWithRemoveComments(nodeBuilder.EmitContext())
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}
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var sourceFile *ast.SourceFile
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if enclosingDeclaration != nil {
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sourceFile = ast.GetSourceFileOfNode(enclosingDeclaration)
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}
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p.Write(typeNode, sourceFile, writer, nil)
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result := writer.String()
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maxLength := defaultMaximumTruncationLength * 2
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if vc != nil && vc.MaxTruncationLength > 0 {
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maxLength = vc.MaxTruncationLength * 10 // hard cutoff matching Strada's absoluteMaximumLength
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}
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if noTruncation {
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maxLength = noTruncationMaximumTruncationLength * 2
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}
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if maxLength > 0 && result != "" && len(result) >= maxLength {
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if vc != nil {
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vc.Truncated = true
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}
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return result[0:maxLength-len("...")] + "..."
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}
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return result
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}
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func (c *Checker) SymbolToString(s *ast.Symbol) string {
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return c.symbolToString(s)
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}
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func (c *Checker) symbolToString(symbol *ast.Symbol) string {
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return c.symbolToStringEx(symbol, nil, ast.SymbolFlagsAll, SymbolFormatFlagsAllowAnyNodeKind)
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}
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func (c *Checker) SymbolToStringEx(symbol *ast.Symbol, enclosingDeclaration *ast.Node, meaning ast.SymbolFlags, flags SymbolFormatFlags) string {
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return c.symbolToStringEx(symbol, enclosingDeclaration, meaning, flags)
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}
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func (c *Checker) symbolToStringEx(symbol *ast.Symbol, enclosingDeclaration *ast.Node, meaning ast.SymbolFlags, flags SymbolFormatFlags) string {
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writer, putWriter := printer.GetSingleLineStringWriter()
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defer putWriter()
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nodeFlags := nodebuilder.FlagsIgnoreErrors
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internalNodeFlags := nodebuilder.InternalFlagsNone
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if flags&SymbolFormatFlagsUseOnlyExternalAliasing != 0 {
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nodeFlags |= nodebuilder.FlagsUseOnlyExternalAliasing
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}
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if flags&SymbolFormatFlagsWriteTypeParametersOrArguments != 0 {
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nodeFlags |= nodebuilder.FlagsWriteTypeParametersInQualifiedName
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}
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if flags&SymbolFormatFlagsUseAliasDefinedOutsideCurrentScope != 0 {
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nodeFlags |= nodebuilder.FlagsUseAliasDefinedOutsideCurrentScope
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}
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if flags&SymbolFormatFlagsDoNotIncludeSymbolChain != 0 {
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internalNodeFlags |= nodebuilder.InternalFlagsDoNotIncludeSymbolChain
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}
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if flags&SymbolFormatFlagsWriteComputedProps != 0 {
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internalNodeFlags |= nodebuilder.InternalFlagsWriteComputedProps
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}
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nodeBuilder, release := c.getNodeBuilder()
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defer release()
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var sourceFile *ast.SourceFile
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if enclosingDeclaration != nil {
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sourceFile = ast.GetSourceFileOfNode(enclosingDeclaration)
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}
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var printer_ *printer.Printer
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// add neverAsciiEscape for GH#39027
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if enclosingDeclaration != nil && enclosingDeclaration.Kind == ast.KindSourceFile {
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printer_ = createPrinterWithRemoveCommentsNeverAsciiEscape(nodeBuilder.EmitContext())
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} else {
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printer_ = createPrinterWithRemoveComments(nodeBuilder.EmitContext())
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}
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var builder func(symbol *ast.Symbol, meaning ast.SymbolFlags, enclosingDeclaration *ast.Node, flags nodebuilder.Flags, internalFlags nodebuilder.InternalFlags, tracker nodebuilder.SymbolTracker) *ast.Node
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if flags&SymbolFormatFlagsAllowAnyNodeKind != 0 {
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builder = nodeBuilder.SymbolToNode
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} else {
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builder = nodeBuilder.SymbolToEntityName
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}
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entity := builder(symbol, meaning, enclosingDeclaration, nodeFlags, internalNodeFlags, nil) // TODO: GH#18217
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printer_.Write(entity /*sourceFile*/, sourceFile, getTrailingSemicolonDeferringWriter(writer), nil) // TODO: GH#18217
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return writer.String()
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}
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func (c *Checker) signatureToString(signature *Signature) string {
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return c.signatureToStringEx(signature, nil, TypeFormatFlagsNone, nil)
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}
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func (c *Checker) SignatureToStringEx(signature *Signature, enclosingDeclaration *ast.Node, flags TypeFormatFlags, vc *VerbosityContext) string {
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return c.signatureToStringEx(signature, enclosingDeclaration, flags, vc)
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}
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func (c *Checker) signatureToStringEx(signature *Signature, enclosingDeclaration *ast.Node, flags TypeFormatFlags, vc *VerbosityContext) string {
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isConstructor := signature.flags&SignatureFlagsConstruct != 0 && flags&TypeFormatFlagsWriteCallStyleSignature == 0
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var sigOutput ast.Kind
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if flags&TypeFormatFlagsWriteArrowStyleSignature != 0 {
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if isConstructor {
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sigOutput = ast.KindConstructorType
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} else {
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sigOutput = ast.KindFunctionType
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}
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} else {
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if isConstructor {
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sigOutput = ast.KindConstructSignature
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} else {
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sigOutput = ast.KindCallSignature
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}
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}
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nodeBuilder, release := c.getNodeBuilder()
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defer release()
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oldVerbosity := nodeBuilder.verbosity
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nodeBuilder.verbosity = vc
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defer func() {
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nodeBuilder.verbosity = oldVerbosity
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}()
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combinedFlags := toNodeBuilderFlags(flags) | nodebuilder.FlagsIgnoreErrors | nodebuilder.FlagsWriteTypeParametersInQualifiedName
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sig := nodeBuilder.SignatureToSignatureDeclaration(signature, sigOutput, enclosingDeclaration, combinedFlags, nodebuilder.InternalFlagsNone, nil)
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p := createPrinterWithRemoveCommentsOmitTrailingSemicolonNeverAsciiEscape(nodeBuilder.EmitContext())
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var sourceFile *ast.SourceFile
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if enclosingDeclaration != nil {
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sourceFile = ast.GetSourceFileOfNode(enclosingDeclaration)
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}
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if flags&TypeFormatFlagsMultilineObjectLiterals != 0 {
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writer := printer.NewTextWriter("\n", 0)
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p.Write(sig, sourceFile, getTrailingSemicolonDeferringWriter(writer), nil)
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return writer.String()
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}
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writer, putWriter := printer.GetSingleLineStringWriter()
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defer putWriter()
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p.Write(sig, sourceFile, getTrailingSemicolonDeferringWriter(writer), nil)
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return writer.String()
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}
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func (c *Checker) typePredicateToString(typePredicate *TypePredicate) string {
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return c.typePredicateToStringEx(typePredicate, nil, TypeFormatFlagsUseAliasDefinedOutsideCurrentScope)
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}
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func (c *Checker) typePredicateToStringEx(typePredicate *TypePredicate, enclosingDeclaration *ast.Node, flags TypeFormatFlags) string {
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writer, putWriter := printer.GetSingleLineStringWriter()
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defer putWriter()
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nodeBuilder, release := c.getNodeBuilder()
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defer release()
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combinedFlags := toNodeBuilderFlags(flags) | nodebuilder.FlagsIgnoreErrors | nodebuilder.FlagsWriteTypeParametersInQualifiedName
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predicate := nodeBuilder.TypePredicateToTypePredicateNode(typePredicate, enclosingDeclaration, combinedFlags, nodebuilder.InternalFlagsNone, nil) // TODO: GH#18217
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printer_ := createPrinterWithRemoveComments(nodeBuilder.EmitContext())
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var sourceFile *ast.SourceFile
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if enclosingDeclaration != nil {
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sourceFile = ast.GetSourceFileOfNode(enclosingDeclaration)
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}
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printer_.Write(predicate /*sourceFile*/, sourceFile, writer, nil)
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return writer.String()
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}
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func (c *Checker) valueToString(value any) string {
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return ValueToString(value)
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}
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func (c *Checker) formatUnionTypes(types []*Type, expandingEnum bool) []*Type {
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var result []*Type
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var flags TypeFlags
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for i := 0; i < len(types); i++ {
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t := types[i]
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flags |= t.flags
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if t.flags&TypeFlagsNullable == 0 {
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if t.flags&TypeFlagsBooleanLiteral != 0 || (!expandingEnum && t.flags&TypeFlagsEnumLike != 0) {
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var baseType *Type
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if t.flags&TypeFlagsBooleanLiteral != 0 {
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baseType = c.booleanType
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} else {
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baseType = c.getBaseTypeOfEnumLikeType(t)
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}
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if baseType.flags&TypeFlagsUnion != 0 {
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count := len(baseType.AsUnionType().types)
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if i+count <= len(types) && c.getRegularTypeOfLiteralType(types[i+count-1]) == c.getRegularTypeOfLiteralType(baseType.AsUnionType().types[count-1]) {
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result = append(result, baseType)
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i += count - 1
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continue
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}
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}
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}
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result = append(result, t)
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}
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}
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if flags&TypeFlagsNull != 0 {
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result = append(result, c.nullType)
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}
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if flags&TypeFlagsUndefined != 0 {
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result = append(result, c.undefinedType)
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}
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return result
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}
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func (c *Checker) TypeToTypeNode(t *Type, enclosingDeclaration *ast.Node, flags nodebuilder.Flags, idToSymbol map[*ast.IdentifierNode]*ast.Symbol) *ast.TypeNode {
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nodeBuilder := c.getNodeBuilderEx(idToSymbol)
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return nodeBuilder.TypeToTypeNode(t, enclosingDeclaration, flags, nodebuilder.InternalFlagsNone, nil)
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}
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func (c *Checker) SignatureToSignatureDeclaration(signature *Signature, kind ast.Kind, enclosingDeclaration *ast.Node, flags nodebuilder.Flags) *ast.Node {
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nodeBuilder, release := c.getNodeBuilder()
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defer release()
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return nodeBuilder.SignatureToSignatureDeclaration(signature, kind, enclosingDeclaration, flags, nodebuilder.InternalFlagsNone, nil)
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}
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// ExpandSymbolForHover produces declaration strings for a symbol with verbosity support for expandable hover.
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func (c *Checker) ExpandSymbolForHover(symbol *ast.Symbol, meaning ast.SymbolFlags, vc *VerbosityContext) string {
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nodeBuilder, release := c.getNodeBuilder()
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defer release()
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oldVerbosity := nodeBuilder.verbosity
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nodeBuilder.verbosity = vc
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defer func() {
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nodeBuilder.verbosity = oldVerbosity
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}()
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nodes := nodeBuilder.ExpandSymbolForHover(symbol, meaning)
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if len(nodes) == 0 {
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return ""
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}
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p := createPrinterWithRemoveComments(nodeBuilder.EmitContext())
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var sourceFile *ast.SourceFile
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if symbol.ValueDeclaration != nil {
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sourceFile = ast.GetSourceFileOfNode(symbol.ValueDeclaration)
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}
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var b strings.Builder
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for i, node := range nodes {
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if i > 0 {
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b.WriteString("\n")
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}
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b.WriteString(p.Emit(node, sourceFile))
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}
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return b.String()
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}
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// TypeParameterToStringEx renders a type parameter declaration (e.g. "T extends Foo") with optional verbosity support.
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func (c *Checker) TypeParameterToStringEx(t *Type, enclosingDeclaration *ast.Node, vc *VerbosityContext) string {
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nodeBuilder, release := c.getNodeBuilder()
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defer release()
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oldVerbosity := nodeBuilder.verbosity
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nodeBuilder.verbosity = vc
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defer func() {
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nodeBuilder.verbosity = oldVerbosity
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}()
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typeParamNode := nodeBuilder.TypeParameterToDeclaration(t, enclosingDeclaration, nodebuilder.FlagsIgnoreErrors, nodebuilder.InternalFlagsNone, nil)
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if typeParamNode == nil {
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return c.TypeToString(t)
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}
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p := createPrinterWithRemoveComments(nodeBuilder.EmitContext())
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var sourceFile *ast.SourceFile
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if enclosingDeclaration != nil {
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sourceFile = ast.GetSourceFileOfNode(enclosingDeclaration)
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}
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return p.Emit(typeParamNode, sourceFile)
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}
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func (c *Checker) TypeToTypeNodeEx(t *Type, enclosingDeclaration *ast.Node, flags nodebuilder.Flags, internalFlags nodebuilder.InternalFlags, idToSymbol map[*ast.IdentifierNode]*ast.Symbol) *ast.TypeNode {
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nodeBuilder := c.getNodeBuilderEx(idToSymbol)
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return nodeBuilder.TypeToTypeNode(t, enclosingDeclaration, flags, internalFlags, nil)
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}
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func (c *Checker) TypePredicateToTypePredicateNode(t *TypePredicate, enclosingDeclaration *ast.Node, flags nodebuilder.Flags, idToSymbol map[*ast.IdentifierNode]*ast.Symbol) *ast.TypePredicateNodeNode {
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nodeBuilder := c.getNodeBuilderEx(idToSymbol)
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return nodeBuilder.TypePredicateToTypePredicateNode(t, enclosingDeclaration, flags, nodebuilder.InternalFlagsNone, nil)
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}
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