Enum NodeCountError 

#[non_exhaustive]
pub enum NodeCountError {
    Parse {
        message: String,
    },
    NoOperation,
    MultipleOperations {
        names: Vec<String>,
    },
    UnboundVariable {
        field: String,
        argument: PageSizeArgument,
        variable: String,
        position: Position,
    },
    PageSizeOutOfRange {
        field: String,
        argument: PageSizeArgument,
        value: i64,
        position: Position,
    },
    PageSizeNotAnInteger {
        field: String,
        argument: PageSizeArgument,
        found: String,
        position: Position,
    },
    UndefinedFragment {
        name: String,
        position: Position,
    },
    FragmentCycle {
        name: String,
        position: Position,
    },
    Overflow {
        field: String,
        position: Position,
    },
}

Why a document’s node count could not be computed.

Marked #[non_exhaustive]: a future release may add a variant without that being a breaking change, so match with a _ => arm.

Every variant’s Display names the field or the document position at fault, so a consumer can report which part of its query is wrong without re-parsing the document itself.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Parse

The text is not a GraphQL document.

Fields

message: String

The parser’s own message, which carries the position it stopped at.

NoOperation

The document declares no operation, so there is nothing to count.

MultipleOperations

The document declares more than one operation.

node_count counts the operation in a document and takes no operation name, so it cannot say which one was meant. Split the document and ask once per operation.

Fields

names: Vec<String>

The operations found, named in document order; an anonymous operation appears as <anonymous>.

UnboundVariable

A first:/last: argument names a variable the caller did not bind.

Fields

field: String

The field carrying the argument, as the document spells it.

argument: PageSizeArgument

Which page-size argument it was.

variable: String

The variable name, without the leading $.

position: Position

Where the field appears in the document.

PageSizeOutOfRange

A first:/last: page size falls outside GitHub’s 1..=100.

Fields

field: String

The field carrying the argument, as the document spells it.

argument: PageSizeArgument

Which page-size argument it was.

value: i64

The page size that was rejected.

position: Position

Where the field appears in the document.

PageSizeNotAnInteger

A first:/last: argument is neither an integer literal nor a variable.

Fields

field: String

The field carrying the argument, as the document spells it.

argument: PageSizeArgument

Which page-size argument it was.

found: String

The argument value as the document wrote it.

position: Position

Where the field appears in the document.

UndefinedFragment

A spread names a fragment the document does not define.

Fields

name: String

The fragment name, without the leading ....

position: Position

Where the spread appears in the document.

FragmentCycle

A fragment spreads itself, directly or through other fragments.

GraphQL forbids this; counting it would not terminate.

Fields

name: String

The fragment the cycle was detected re-entering.

position: Position

Where the spread that closes the cycle appears.

Overflow

The count grew past what a u64 can express.

Reachable only from a document nesting enough maximum-size pages that the running multiplier overflows — far above NODE_LIMIT, so such a document is over the limit whatever the exact number would be.

Fields

field: String

The field whose multiplication overflowed.

position: Position

Where that field appears in the document.

Trait Implementations

impl Clone for NodeCountError

fn clone(&self) -> NodeCountError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for NodeCountError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for NodeCountError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for NodeCountError

impl Error for NodeCountError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for NodeCountError

fn eq(&self, other: &NodeCountError) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for NodeCountError