Description
Partition an explicit argv at its first exact -- end-of-options marker; no shell tokenization or reclassification of later tokens.
An argv vector already consists of literal argument strings. Shell quoting and tokenization happen before this representation; joining argv elements with spaces does not reconstruct a safe command string. Option aliases, duplicates, arity and dependencies are application policies that these tools take explicitly.
Partition an explicit argv at its first exact -- end-of-options marker; no shell tokenization or reclassification of later tokens.
When to use this tool
Use this tool to partition an explicit argv at its first exact -- end-of-options marker; no shell tokenization or reclassification of later tokens.
How to use the tool and how it works
- Enter arguments using the input definitions below.
- Run the operation. Resolve malformed-input errors before interpreting the result.
- Read result.before, result.after, result.markerIndex. Interpret signs, units, ordering and null values using the rules below.
Locate the first exact -- token. Return tokens before and after it, excluding that marker, plus its zero-based index; if absent return the whole list as before, empty after and null markerIndex.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| arguments | Literal argv string vector in source order; each element is already one argument. | Dense list of at most 128 strings, each at most 8,192 UTF-16 code units. |
| Output field | Interpretation |
|---|---|
| result | Object containing the fields below. |
| result.before | Arguments before the first exact end-of-options marker, excluding that marker. |
| result.after | Literal arguments after the marker; empty if no marker occurs. |
| result.markerIndex | Original index of the first exact marker, or null. |
{
"input": {
"arguments": [
"-x",
"--",
"--value"
]
},
"output": {
"result": {
"before": [
"-x"
],
"after": [
"--value"
],
"markerIndex": 1
}
}
}Limitations and assumptions
- Later -- tokens remain literal members of after. No shell splitting or option parsing is performed.
- Inputs are literal tokens or explicit records. The restricted long-name grammar is [A-Za-z0-9][A-Za-z0-9-]* where required. No universal option syntax, shell semantics or process execution is inferred.
- Every declared top-level input is required and unknown fields are rejected. Ordinary strings are limited to 8,192 UTF-16 code units and lists to 128 entries, with tighter operation-specific bounds where stated. JSON text has bounded nesting and node counts.
- Numeric outputs must be finite and within the absolute safe-integer magnitude; exact larger integers use decimal text. Source positions are zero-based UTF-16 offsets and span ends are exclusive unless a different convention is explicitly stated.
Alternative or Complementary methods
Use the application’s option schema to choose arity, aliases and conflict policy. Pass a literal argv vector to the intended process interface; shell command construction requires separate quoting rules.
References
Similar or alternative tools
- Long Option Assignment Joiner
Format one literal long-option argv token under a restricted ASCII option-name grammar; returns one argument, not shell quoting.
- Long Option Assignment Splitter
Split one strict ASCII --long-name[=value] argv token at the first equals; no shell parsing or implicit next-token consumption.