yq/pkg/yqlib/operator_variables.go

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2021-02-03 04:51:26 +00:00
package yqlib
import (
"container/list"
"fmt"
)
func getVariableOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
variableName := expressionNode.Operation.StringValue
log.Debug("getVariableOperator %v", variableName)
result := context.GetVariable(variableName)
if result == nil {
result = list.New()
}
return context.ChildContext(result), nil
}
func assignVariableOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
lhs, err := d.GetMatchingNodes(context.ReadOnlyClone(), expressionNode.Lhs)
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if err != nil {
return Context{}, nil
}
if expressionNode.Rhs.Operation.OperationType.Type != "GET_VARIABLE" {
return Context{}, fmt.Errorf("RHS of 'as' operator must be a variable name e.g. $foo")
}
variableName := expressionNode.Rhs.Operation.StringValue
context.SetVariable(variableName, lhs.MatchingNodes)
return context, nil
}