// generateShortCircuitedBinaryOperator generates the expression source for a short circuiting binary operator.
func (eg *expressionGenerator) generateShortCircuitedBinaryOperator(binaryOp *codedom.BinaryOperationNode, context generationContext) esbuilder.ExpressionBuilder {
compareValue := codedom.LiteralValue("false", binaryOp.BasisNode())
if binaryOp.Operator == "&&" {
compareValue = codedom.LiteralValue("true", binaryOp.BasisNode())
}
return eg.generateShortCircuiter(
binaryOp.LeftExpr,
compareValue,
binaryOp.RightExpr,
context,
func(resultName string, rightSide esbuilder.ExpressionBuilder) esbuilder.ExpressionBuilder {
return esbuilder.Binary(esbuilder.Identifier(resultName), binaryOp.Operator, rightSide)
})
}
// generateAwaitPromise generates the expression source for waiting for a promise.
func (eg *expressionGenerator) generateAwaitPromise(awaitPromise *codedom.AwaitPromiseNode, context generationContext) esbuilder.ExpressionBuilder {
resultName := eg.generateUniqueName("$result")
childExpr := eg.generateExpression(awaitPromise.ChildExpression, context)
// Add an asynchronous wrapper for the await that executes the child expression as a promise and then
// waits for it to return (via a call to then), at which point the wrapped expression is executed.
if context.shortCircuiter != nil {
eg.addAsyncWrapper(esbuilder.Binary(context.shortCircuiter, "||", childExpr), resultName)
} else {
eg.addAsyncWrapper(childExpr, resultName)
}
// An await expression is a reference to the "result" after waiting on the child expression
// and then executing the parent expression inside the await callback.
return esbuilder.Identifier(resultName)
}
// generateNormalBinaryOperator generates the expression source for a non-short circuiting binary operator.
func (eg *expressionGenerator) generateNormalBinaryOperator(binaryOp *codedom.BinaryOperationNode, context generationContext) esbuilder.ExpressionBuilder {
binaryLeftExpr := eg.generateExpression(binaryOp.LeftExpr, context)
binaryRightExpr := eg.generateExpression(binaryOp.RightExpr, context)
return esbuilder.Binary(binaryLeftExpr, binaryOp.Operator, binaryRightExpr)
}