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Add unit parsing and eval support

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This commit is contained in:
JT
2021-10-05 15:27:39 +13:00
parent 75ec0d123a
commit 535ece4e76
15 changed files with 598 additions and 38 deletions
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83
crates/nu-engine/src/eval.rs
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@ -1,6 +1,6 @@
use nu_protocol::ast::{Block, Call, Expr, Expression, Operator, Statement};
use nu_protocol::engine::EvaluationContext;
use nu_protocol::{Range, ShellError, Span, Type, Value};
use nu_protocol::{Range, ShellError, Span, Type, Unit, Value};
pub fn eval_operator(op: &Expression) -> Result<Operator, ShellError> {
match op {
@ -123,6 +123,10 @@ pub fn eval_expression(
val: *f,
span: expr.span,
}),
Expr::ValueWithUnit(e, unit) => match eval_expression(context, e)? {
Value::Int { val, .. } => Ok(compute(val, unit.item, unit.span)),
_ => Err(ShellError::CantConvert("unit value".into(), e.span)),
},
Expr::Range(from, next, to, operator) => {
let from = if let Some(f) = from {
eval_expression(context, f)?
@ -291,3 +295,80 @@ pub fn eval_block(
Ok(input)
}
pub fn compute(size: i64, unit: Unit, span: Span) -> Value {
match unit {
Unit::Byte => Value::Filesize { val: size, span },
Unit::Kilobyte => Value::Filesize {
val: size * 1000,
span,
},
Unit::Megabyte => Value::Filesize {
val: size * 1000 * 1000,
span,
},
Unit::Gigabyte => Value::Filesize {
val: size * 1000 * 1000 * 1000,
span,
},
Unit::Terabyte => Value::Filesize {
val: size * 1000 * 1000 * 1000 * 1000,
span,
},
Unit::Petabyte => Value::Filesize {
val: size * 1000 * 1000 * 1000 * 1000 * 1000,
span,
},
Unit::Kibibyte => Value::Filesize {
val: size * 1024,
span,
},
Unit::Mebibyte => Value::Filesize {
val: size * 1024 * 1024,
span,
},
Unit::Gibibyte => Value::Filesize {
val: size * 1024 * 1024 * 1024,
span,
},
Unit::Tebibyte => Value::Filesize {
val: size * 1024 * 1024 * 1024 * 1024,
span,
},
Unit::Pebibyte => Value::Filesize {
val: size * 1024 * 1024 * 1024 * 1024 * 1024,
span,
},
Unit::Nanosecond => Value::Duration { val: size, span },
Unit::Microsecond => Value::Duration {
val: size * 1000,
span,
},
Unit::Millisecond => Value::Duration {
val: size * 1000 * 1000,
span,
},
Unit::Second => Value::Duration {
val: size * 1000 * 1000 * 1000,
span,
},
Unit::Minute => Value::Duration {
val: size * 1000 * 1000 * 1000 * 60,
span,
},
Unit::Hour => Value::Duration {
val: size * 1000 * 1000 * 1000 * 60 * 60,
span,
},
Unit::Day => Value::Duration {
val: size * 1000 * 1000 * 1000 * 60 * 60 * 24,
span,
},
Unit::Week => Value::Duration {
val: size * 1000 * 1000 * 1000 * 60 * 60 * 24 * 7,
span,
},
}
}