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|
use super::*;
/// Apply plus operator to a value.
pub fn pos(ctx: &mut EvalContext, span: Span, value: Value) -> Value {
if value.is_numeric() {
value
} else {
ctx.diag(error!(
span,
"cannot apply plus operator to {}",
value.type_name()
));
Value::Error
}
}
/// Compute the negation of a value.
pub fn neg(ctx: &mut EvalContext, span: Span, value: Value) -> Value {
use Value::*;
match value {
Int(v) => Int(-v),
Float(v) => Float(-v),
Length(v) => Length(-v),
Angle(v) => Angle(-v),
Relative(v) => Relative(-v),
Linear(v) => Linear(-v),
v => {
ctx.diag(error!(span, "cannot negate {}", v.type_name()));
Value::Error
}
}
}
/// Compute the sum of two values.
pub fn add(ctx: &mut EvalContext, span: Span, lhs: Value, rhs: Value) -> Value {
use Value::*;
match (lhs, rhs) {
// Numeric types to themselves.
(Int(a), Int(b)) => Int(a + b),
(Int(a), Float(b)) => Float(a as f64 + b),
(Float(a), Int(b)) => Float(a + b as f64),
(Float(a), Float(b)) => Float(a + b),
(Angle(a), Angle(b)) => Angle(a + b),
(Length(a), Length(b)) => Length(a + b),
(Length(a), Relative(b)) => Linear(a + b),
(Length(a), Linear(b)) => Linear(a + b),
(Relative(a), Length(b)) => Linear(a + b),
(Relative(a), Relative(b)) => Relative(a + b),
(Relative(a), Linear(b)) => Linear(a + b),
(Linear(a), Length(b)) => Linear(a + b),
(Linear(a), Relative(b)) => Linear(a + b),
(Linear(a), Linear(b)) => Linear(a + b),
// Complex data types to themselves.
(Str(a), Str(b)) => Str(a + &b),
(Array(a), Array(b)) => Array(concat(a, b)),
(Dict(a), Dict(b)) => Dict(concat(a, b)),
(Template(a), Template(b)) => Template(concat(a, b)),
(a, b) => {
ctx.diag(error!(
span,
"cannot add {} and {}",
a.type_name(),
b.type_name()
));
Value::Error
}
}
}
/// Compute the difference of two values.
pub fn sub(ctx: &mut EvalContext, span: Span, lhs: Value, rhs: Value) -> Value {
use Value::*;
match (lhs, rhs) {
// Numbers from themselves.
(Int(a), Int(b)) => Int(a - b),
(Int(a), Float(b)) => Float(a as f64 - b),
(Float(a), Int(b)) => Float(a - b as f64),
(Float(a), Float(b)) => Float(a - b),
(Angle(a), Angle(b)) => Angle(a - b),
(Length(a), Length(b)) => Length(a - b),
(Length(a), Relative(b)) => Linear(a - b),
(Length(a), Linear(b)) => Linear(a - b),
(Relative(a), Length(b)) => Linear(a - b),
(Relative(a), Relative(b)) => Relative(a - b),
(Relative(a), Linear(b)) => Linear(a - b),
(Linear(a), Length(b)) => Linear(a - b),
(Linear(a), Relative(b)) => Linear(a - b),
(Linear(a), Linear(b)) => Linear(a - b),
(a, b) => {
ctx.diag(error!(
span,
"cannot subtract {1} from {0}",
a.type_name(),
b.type_name()
));
Value::Error
}
}
}
/// Compute the product of two values.
pub fn mul(ctx: &mut EvalContext, span: Span, lhs: Value, rhs: Value) -> Value {
use Value::*;
match (lhs, rhs) {
// Numeric types with numbers.
(Int(a), Int(b)) => Int(a * b),
(Int(a), Float(b)) => Float(a as f64 * b),
(Float(a), Int(b)) => Float(a * b as f64),
(Float(a), Float(b)) => Float(a * b),
(Length(a), Int(b)) => Length(a * b as f64),
(Length(a), Float(b)) => Length(a * b),
(Int(a), Length(b)) => Length(a as f64 * b),
(Float(a), Length(b)) => Length(a * b),
(Angle(a), Int(b)) => Angle(a * b as f64),
(Angle(a), Float(b)) => Angle(a * b),
(Int(a), Angle(b)) => Angle(a as f64 * b),
(Float(a), Angle(b)) => Angle(a * b),
(Relative(a), Int(b)) => Relative(a * b as f64),
(Relative(a), Float(b)) => Relative(a * b),
(Int(a), Relative(b)) => Relative(a as f64 * b),
(Float(a), Relative(b)) => Relative(a * b),
(Linear(a), Int(b)) => Linear(a * b as f64),
(Linear(a), Float(b)) => Linear(a * b),
(Int(a), Linear(b)) => Linear(a as f64 * b),
(Float(a), Linear(b)) => Linear(a * b),
// Integers with strings.
(Int(a), Str(b)) => Str(b.repeat(0.max(a) as usize)),
(Str(a), Int(b)) => Str(a.repeat(0.max(b) as usize)),
(a, b) => {
ctx.diag(error!(
span,
"cannot multiply {} with {}",
a.type_name(),
b.type_name()
));
Value::Error
}
}
}
/// Compute the quotient of two values.
pub fn div(ctx: &mut EvalContext, span: Span, lhs: Value, rhs: Value) -> Value {
use Value::*;
match (lhs, rhs) {
// Numeric types by numbers.
(Int(a), Int(b)) => Float(a as f64 / b as f64),
(Int(a), Float(b)) => Float(a as f64 / b),
(Float(a), Int(b)) => Float(a / b as f64),
(Float(a), Float(b)) => Float(a / b),
(Length(a), Int(b)) => Length(a / b as f64),
(Length(a), Float(b)) => Length(a / b),
(Angle(a), Int(b)) => Angle(a / b as f64),
(Angle(a), Float(b)) => Angle(a / b),
(Relative(a), Int(b)) => Relative(a / b as f64),
(Relative(a), Float(b)) => Relative(a / b),
(Linear(a), Int(b)) => Linear(a / b as f64),
(Linear(a), Float(b)) => Linear(a / b),
(a, b) => {
ctx.diag(error!(
span,
"cannot divide {} by {}",
a.type_name(),
b.type_name()
));
Value::Error
}
}
}
/// Concatenate two collections.
fn concat<T, A>(mut a: T, b: T) -> T
where
T: Extend<A> + IntoIterator<Item = A>,
{
a.extend(b);
a
}
|
