Function parse_int

crates/expr/src/lib.rs:177–197

Parse an integer literal into an [AlgebraicValue]

(
    literal: &str,
    ty: AlgebraicType,
    to_int: ToInt,
    to_val: ToVal,
)

/// Parse an integer literal into an [AlgebraicValue]
fn parse_int<Int, Val, ToInt, ToVal>(
    literal: &str,
    ty: AlgebraicType,
    to_int: ToInt,
    to_val: ToVal,
) -> anyhow::Result<AlgebraicValue>
where
    Int: Into<Val>,
    ToInt: FnOnce(&BigDecimal) -> Option<Int>,
    ToVal: FnOnce(Val) -> AlgebraicValue,
{
    // Why are we using an arbitrary precision type?
    // For scientific notation as well as i256 and u256.
    BigDecimal::from_str(literal)
        .ok()
        .filter(|decimal| decimal.is_integer())
        .ok_or_else(|| anyhow!("{literal} is not an integer"))
        .map(|decimal| to_int(&decimal).map(|val| val.into()).map(to_val))
        .transpose()
        .ok_or_else(|| anyhow!("{literal} is out of bounds for type {}", fmt_algebraic_type(&ty)))?
}

/// Parse a floating point literal into an [AlgebraicValue]
fn parse_float<Float, Value, ToFloat, ToValue>(