259 lines
11 KiB
Rust
259 lines
11 KiB
Rust
use crate::{
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context::Context,
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error::{RuntimeError, ValidationError},
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value::ValueInner,
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Value,
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};
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use super::{AbstractNode, Action, Expression, SourcePosition, Type, WithPosition};
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#[derive(Clone, Debug, Eq, PartialEq, PartialOrd, Ord)]
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pub enum Math {
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Add(WithPosition<Expression>, WithPosition<Expression>),
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Subtract(WithPosition<Expression>, WithPosition<Expression>),
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Multiply(WithPosition<Expression>, WithPosition<Expression>),
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Divide(WithPosition<Expression>, WithPosition<Expression>),
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Modulo(WithPosition<Expression>, WithPosition<Expression>),
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}
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impl AbstractNode for Math {
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fn expected_type(&self, _context: &Context) -> Result<Type, ValidationError> {
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match self {
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Math::Add(left, _)
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| Math::Subtract(left, _)
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| Math::Multiply(left, _)
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| Math::Divide(left, _)
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| Math::Modulo(left, _) => left.node.expected_type(_context),
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}
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}
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fn validate(&self, context: &Context) -> Result<(), ValidationError> {
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match self {
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Math::Add(left, right)
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| Math::Subtract(left, right)
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| Math::Multiply(left, right)
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| Math::Divide(left, right)
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| Math::Modulo(left, right) => {
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let left_type = left.node.expected_type(context)?;
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let right_type = right.node.expected_type(context)?;
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if let Type::Integer | Type::Float = left_type {
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if let Type::Integer | Type::Float = right_type {
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Ok(())
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} else {
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Err(ValidationError::ExpectedIntegerOrFloat(right.position))
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}
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} else {
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Err(ValidationError::ExpectedIntegerOrFloat(left.position))
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}
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}
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}
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}
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fn run(self, _context: &Context) -> Result<Action, RuntimeError> {
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let run_and_expect_value =
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|expression: Expression, position: SourcePosition| -> Result<Value, RuntimeError> {
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let action = expression.run(_context)?;
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let value = if let Action::Return(value) = action {
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value
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} else {
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return Err(RuntimeError::ValidationFailure(
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ValidationError::InterpreterExpectedReturn(position),
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));
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};
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Ok(value)
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};
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let value = match self {
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Math::Add(left, right) => {
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let left_value = run_and_expect_value(left.node, left.position)?;
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let right_value = run_and_expect_value(right.node, right.position)?;
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match (left_value.inner().as_ref(), right_value.inner().as_ref()) {
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(ValueInner::Integer(left), ValueInner::Integer(right)) => {
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let sum = left.saturating_add(*right);
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Value::integer(sum)
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}
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(ValueInner::Float(left), ValueInner::Float(right)) => {
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let sum = left + right;
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Value::float(sum)
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}
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(ValueInner::Float(left), ValueInner::Integer(right)) => {
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let sum = left + *right as f64;
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Value::float(sum)
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}
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(ValueInner::Integer(left), ValueInner::Float(right)) => {
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let sum = *left as f64 + right;
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Value::float(sum)
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}
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(ValueInner::Integer(_) | ValueInner::Float(_), _) => {
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return Err(RuntimeError::ValidationFailure(
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ValidationError::ExpectedIntegerOrFloat(right.position),
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))
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}
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_ => {
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return Err(RuntimeError::ValidationFailure(
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ValidationError::ExpectedIntegerOrFloat(left.position),
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))
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}
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}
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}
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Math::Subtract(left, right) => {
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let left_value = run_and_expect_value(left.node, left.position)?;
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let right_value = run_and_expect_value(right.node, right.position)?;
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match (left_value.inner().as_ref(), right_value.inner().as_ref()) {
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(ValueInner::Integer(left), ValueInner::Integer(right)) => {
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let difference = left.saturating_sub(*right);
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Value::integer(difference)
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}
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(ValueInner::Float(left), ValueInner::Float(right)) => {
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let difference = left - right;
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Value::float(difference)
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}
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(ValueInner::Float(left), ValueInner::Integer(right)) => {
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let difference = left - *right as f64;
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Value::float(difference)
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}
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(ValueInner::Integer(left), ValueInner::Float(right)) => {
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let difference = *left as f64 - right;
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Value::float(difference)
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}
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(ValueInner::Integer(_) | ValueInner::Float(_), _) => {
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return Err(RuntimeError::ValidationFailure(
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ValidationError::ExpectedIntegerOrFloat(right.position),
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))
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}
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_ => {
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return Err(RuntimeError::ValidationFailure(
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ValidationError::ExpectedIntegerOrFloat(left.position),
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))
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}
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}
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}
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Math::Multiply(left, right) => {
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let left_value = run_and_expect_value(left.node, left.position)?;
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let right_value = run_and_expect_value(right.node, right.position)?;
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match (left_value.inner().as_ref(), right_value.inner().as_ref()) {
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(ValueInner::Integer(left), ValueInner::Integer(right)) => {
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let product = left.saturating_mul(*right);
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Value::integer(product)
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}
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(ValueInner::Float(left), ValueInner::Float(right)) => {
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let product = left * right;
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Value::float(product)
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}
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(ValueInner::Float(left), ValueInner::Integer(right)) => {
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let product = left * *right as f64;
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Value::float(product)
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}
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(ValueInner::Integer(left), ValueInner::Float(right)) => {
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let product = *left as f64 * right;
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Value::float(product)
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}
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(ValueInner::Integer(_) | ValueInner::Float(_), _) => {
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return Err(RuntimeError::ValidationFailure(
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ValidationError::ExpectedIntegerOrFloat(right.position).into(),
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))
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}
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_ => {
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return Err(RuntimeError::ValidationFailure(
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ValidationError::ExpectedIntegerOrFloat(left.position),
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))
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}
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}
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}
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Math::Divide(left, right) => {
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let left_value = run_and_expect_value(left.node, left.position)?;
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let right_value = run_and_expect_value(right.node, right.position)?;
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match (left_value.inner().as_ref(), right_value.inner().as_ref()) {
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(ValueInner::Integer(left), ValueInner::Integer(right)) => {
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let quotient = left.saturating_div(*right);
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Value::integer(quotient)
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}
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(ValueInner::Float(left), ValueInner::Float(right)) => {
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let quotient = left / right;
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Value::float(quotient)
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}
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(ValueInner::Float(left), ValueInner::Integer(right)) => {
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let quotient = left / *right as f64;
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Value::float(quotient)
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}
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(ValueInner::Integer(left), ValueInner::Float(right)) => {
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let quotient = *left as f64 / right;
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Value::float(quotient)
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}
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(ValueInner::Integer(_) | ValueInner::Float(_), _) => {
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return Err(RuntimeError::ValidationFailure(
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ValidationError::ExpectedIntegerOrFloat(right.position).into(),
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))
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}
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_ => {
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return Err(RuntimeError::ValidationFailure(
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ValidationError::ExpectedIntegerOrFloat(left.position),
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))
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}
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}
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}
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Math::Modulo(left, right) => {
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let left_value = run_and_expect_value(left.node, left.position)?;
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let right_value = run_and_expect_value(right.node, right.position)?;
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match (left_value.inner().as_ref(), right_value.inner().as_ref()) {
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(ValueInner::Integer(left), ValueInner::Integer(right)) => {
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let remainder = left % right;
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Value::integer(remainder)
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}
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(ValueInner::Float(left), ValueInner::Float(right)) => {
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let remainder = left % right;
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Value::float(remainder)
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}
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(ValueInner::Float(left), ValueInner::Integer(right)) => {
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let remainder = left % *right as f64;
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Value::float(remainder)
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}
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(ValueInner::Integer(left), ValueInner::Float(right)) => {
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let remainder = *left as f64 % right;
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Value::float(remainder)
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}
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(ValueInner::Integer(_) | ValueInner::Float(_), _) => {
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return Err(RuntimeError::ValidationFailure(
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ValidationError::ExpectedIntegerOrFloat(right.position).into(),
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))
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}
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_ => {
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return Err(RuntimeError::ValidationFailure(
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ValidationError::ExpectedIntegerOrFloat(left.position),
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))
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}
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}
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}
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};
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Ok(Action::Return(value))
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}
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}
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