lang.UnmarshalData()
(system API)Converts a Murex data-type into structured memory
data, err := lang.UnmarshalData(p, dataType)
func exampleCommand(p *lang.Process) error {
string `{ "foo": "hello foo", "bar": "hello bar" }`
data :=
"json"
dataType :=
v, err := lang.UnmarshalData(p, dataType)if err != nil {
return err
}
s := fmt.Sprint(v)byte(s))
_, err := p.Stdout.Write([]return err
}
Go source file:
package lang
import (
"fmt"
)
// UnmarshalData is a global unmarshaller which should be called from within
// murex builtin commands (etc).
// See docs/apis/marshaldata.html for more details
func UnmarshalData(p *Process, dataType string) (v interface{}, err error) {
// This is one of the very few maps in Murex which isn't hidden behind a sync
// lock of one description or other. The rational is that even mutexes can
// add a noticeable overhead on the performance of tight loops and I expect
// this function to be called _a lot_ while also only needing to be written
// to via code residing in within builtin types init() function (ie while
// murex is effectively single threaded). So there shouldn't be any data-
// races -- PROVIDING developers strictly follow the pattern of only writing
// to this map within init() func's.
if Unmarshallers[dataType] == nil {
return nil, fmt.Errorf("unknown data type. I don't know how to unmarshal `%s`", dataType)
}
v, err = Unmarshallers[dataType](p)if err != nil {
return nil, fmt.Errorf("[%s unmarshaller] %s", dataType, err.Error())
}
return v, nil
}
func UnmarshalDataBuffered(parent *Process, b []byte, dataType string) (interface{}, error) {
fork := parent.Fork(F_BACKGROUND | F_CREATE_STDIN | F_NO_STDOUT | F_NO_STDERR)defer fork.Kill()
_, err := fork.Stdin.Write(b)if err != nil {
return nil, fmt.Errorf("cannot write value to unmarshaller's buffer: %s", err.Error())
}
v, err := UnmarshalData(fork.Process, dataType)if err != nil {
return nil, fmt.Errorf("cannot unmarshal buffer: %s", err.Error())
}
return v, nil
}
*lang.Process
: Process’s runtime state. Typically expressed as the variable p
string
: Murex data typeMarshal()
(type): Converts structured memory into a structured file format (eg for stdio)Unmarshal()
(type): Converts a structured file format into structured memorylang.MarshalData()
(system API): Converts structured memory into a Murex data-type (eg for stdio)This document was generated from lang/define_unmarshal_doc.yaml.
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Last built on Thu Aug 15 14:38:34 UTC 2024 against commit 50ed9d650ed9d6df391240d3c2c02e623636e508dfcdad1.
Current version is 6.2.4000 which has been verified against tests cases.