38 lines
1.0 KiB
Go
38 lines
1.0 KiB
Go
package estransforms
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import (
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"github.com/microsoft/typescript-go/internal/ast"
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"github.com/microsoft/typescript-go/internal/transformers"
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)
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type optionalCatchTransformer struct {
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transformers.Transformer
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}
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func (ch *optionalCatchTransformer) visit(node *ast.Node) *ast.Node {
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if node.SubtreeFacts()&ast.SubtreeContainsMissingCatchClauseVariable == 0 {
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return node
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}
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switch node.Kind {
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case ast.KindCatchClause:
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return ch.visitCatchClause(node.AsCatchClause())
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default:
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return ch.Visitor().VisitEachChild(node)
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}
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}
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func (ch *optionalCatchTransformer) visitCatchClause(node *ast.CatchClause) *ast.Node {
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if node.VariableDeclaration == nil {
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return ch.Factory().NewCatchClause(
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ch.Factory().NewVariableDeclaration(ch.Factory().NewTempVariable(), nil, nil, nil),
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ch.Visitor().Visit(node.Block),
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)
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}
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return ch.Visitor().VisitEachChild(node.AsNode())
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}
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func newOptionalCatchTransformer(opts *transformers.TransformOptions) *transformers.Transformer {
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tx := &optionalCatchTransformer{}
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return tx.NewTransformer(tx.visit, opts.Context)
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}
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