pub fn parse_metrics(spec: &str) -> Result<Vec<&'static str>>Expand description
Parse a CLI --metrics spec into a typed
Vec<&'static str> of registry names. Format:
comma-separated names that must each match a name field
from either CTPROF_METRICS or
CTPROF_DERIVED_METRICS. Whitespace around each name
is trimmed. Empty input parses to an empty Vec — caller
treats that as “every metric renders” via
DisplayOptions::is_metric_enabled, mirroring
parse_sections’s empty-input semantic.
The returned &'static strs point into the registry’s own
name fields (not into the input spec), so the parsed
vector survives the input string going out of scope and
equality checks against registry names are pointer-stable.
Errors (mirrored from parse_sections / parse_columns
so the three CLI surfaces report drift identically):
- Unknown name (cite the offending token).
- Duplicate name across two entries.
- Empty token between commas.