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add for user-defined functions overriding built-in functions, as in the C impl

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John Kerl 2020-11-24 14:15:20 -05:00
parent 4fed370087
commit 828fc4129a
1 changed files with 9 additions and 0 deletions
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9
go/src/miller/dsl/cst/udf.go
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@ -257,6 +257,15 @@ func (this *RootNode) BuildAndInstallUDF(astNode *dsl.ASTNode) error {
functionName := string(astNode.Token.Lit)
if BuiltinFunctionManagerInstance.LookUp(functionName) != nil {
return errors.New(
fmt.Sprintf(
"Miller: function named \"%s\" must not override a built-in function of the same name.",
functionName,
),
)
}
if this.udfManager.ExistsByName(functionName) {
return errors.New(
fmt.Sprintf(