Struct cel_interpreter::FunctionCtx

pub struct FunctionCtx<'t, 'c, 'e> {
    pub name: Rc<String>,
    pub target: Option<&'t CelType>,
    pub ptx: &'c Context<'c>,
    pub args: &'e [Expression],
}

FunctionCtx is a context object passed to functions when they are called. It contains references ot the target object (if the function is called as a method), the program context (Context) which gives functions access to variables, and the arguments to the function call.

Fields

name: Rc<String>

target: Option<&'t CelType>

ptx: &'c Context<'c>

args: &'e [Expression]

Implementations

impl<'t, 'c, 'e> FunctionCtx<'t, 'c, 'e>

pub fn target(&self) -> Result<&'t CelType, ExecutionError>

Returns a reference to the target object if the function is being called as a method, or it returns an error if the function is not being called as a method.

pub fn check_no_method(&self) -> Result<(), ExecutionError>

Checks that the function is not being called as a method, and returns an error if it is.

pub fn resolve(&self, expr: &'e Expression) -> Result<CelType, ExecutionError>

Resolves the given expression using the program’s Context.

pub fn resolve_all(&self, exprs: &[Expression]) -> ResolveResult

Resolves all of the given expressions using the program’s Context. The resolved values are returned as a CelType::List.

pub fn resolve_arg(&self, index: usize) -> Result<CelType, ExecutionError>

Resolves the argument at the given index. An error is returned if the argument does not exist.

pub fn arg(&self, index: usize) -> Result<&'e Expression, ExecutionError>

Returns the argument at the given index. An error is returned if the argument does not exist.

pub fn arg_ident(&self, index: usize) -> Result<Rc<String>, ExecutionError>

Returns the argument at the given index as a identifier. An error is returned if the argument does not exist, or if it is not an identifier.

pub fn error(&self, message: &str) -> Result<CelType, ExecutionError>

Returns an execution error for the currently execution function.