Struct EvalBuilder 

pub struct EvalBuilder<'a> { /* private fields */ }

A builder bound to a ParsedExpression that defers choosing symbol tables until evaluate is called.

Obtained from parsed.with_*(...) on a ParsedExpression. Every with_* method is chainable. The terminal evaluate(&symtabs) and evaluate_with_metrics(&symtabs) methods build an internal evaluator from the captured configuration and run it.

use openjd_expr::{ExprValue, ParsedExpression, PathFormat, SymbolTable};

let parsed = ParsedExpression::new("Param.Frame * 2").unwrap();
let mut st = SymbolTable::new();
st.set("Param.Frame", 5).unwrap();

let value = parsed
    .with_path_format(PathFormat::Posix)
    .with_memory_limit(50_000_000)
    .evaluate(&[&st])
    .unwrap();
assert_eq!(value, ExprValue::Int(10));

Implementations

impl<'a> EvalBuilder<'a>

pub fn with_library(self, library: &'a FunctionLibrary) -> Self

Use the given function library instead of the default one.

pub fn with_memory_limit(self, limit: usize) -> Self

Cap evaluation memory (bytes). Default: DEFAULT_MEMORY_LIMIT.

pub fn with_operation_limit(self, limit: usize) -> Self

Cap evaluation operations. Default: DEFAULT_OPERATION_LIMIT.

pub fn with_path_format(self, format: PathFormat) -> Self

Normalize path values according to format. Default: host-native.

pub fn with_target_type(self, target_type: &'a ExprType) -> Self

Coerce the final value toward target_type. Default: no coercion.

pub fn evaluate( self, symtabs: &'a [&'a SymbolTable], ) -> Result<ExprValue, ExpressionError>

Evaluate against the supplied symbol tables and return the resulting value.

pub fn evaluate_with_metrics( self, symtabs: &'a [&'a SymbolTable], ) -> Result<EvalResult, ExpressionError>

Evaluate and return the value alongside resource-usage metrics.