29 lines
1.0 KiB
Go
29 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/printer"
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)
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// Gets whether a node is a `static {}` block containing only a single assignment of the static `this` to the `_classThis`
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// (or similar) variable stored in the `classthis` property of the block's `EmitNode`.
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func isClassThisAssignmentBlock(emitContext *printer.EmitContext, node *ast.Node) bool {
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if ast.IsClassStaticBlockDeclaration(node) {
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n := node.AsClassStaticBlockDeclaration()
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body := n.Body.AsBlock()
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if len(body.Statements.Nodes) == 1 {
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statement := body.Statements.Nodes[0]
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if ast.IsExpressionStatement(statement) {
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expression := statement.Expression()
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if ast.IsAssignmentExpression(expression, true /*excludeCompoundAssignment*/) {
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binary := expression.AsBinaryExpression()
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return ast.IsIdentifier(binary.Left) &&
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emitContext.ClassThis(node) == binary.Left &&
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binary.Right.Kind == ast.KindThisKeyword
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}
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}
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}
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}
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return false
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}
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