forked from extern/nushell
271 lines
12 KiB
Rust
271 lines
12 KiB
Rust
use crate::{parser::Operator, parser_state::Type, Expr, Expression, ParseError, ParserWorkingSet};
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impl<'a> ParserWorkingSet<'a> {
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pub fn type_compatible(lhs: &Type, rhs: &Type) -> bool {
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match (lhs, rhs) {
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(Type::List(c), Type::List(d)) => ParserWorkingSet::type_compatible(c, d),
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(Type::Unknown, _) => true,
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(_, Type::Unknown) => true,
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(lhs, rhs) => lhs == rhs,
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}
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}
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pub fn math_result_type(
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&self,
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lhs: &mut Expression,
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op: &mut Expression,
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rhs: &mut Expression,
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) -> (Type, Option<ParseError>) {
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match &op.expr {
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Expr::Operator(operator) => match operator {
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Operator::Plus => match (&lhs.ty, &rhs.ty) {
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(Type::Int, Type::Int) => (Type::Int, None),
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(Type::Float, Type::Int) => (Type::Float, None),
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(Type::Int, Type::Float) => (Type::Float, None),
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(Type::Float, Type::Float) => (Type::Float, None),
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(Type::String, Type::String) => (Type::String, None),
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(Type::Unknown, _) => (Type::Unknown, None),
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(_, Type::Unknown) => (Type::Unknown, None),
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(Type::Int, _) => {
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*rhs = Expression::garbage(rhs.span);
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(
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Type::Unknown,
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Some(ParseError::UnsupportedOperation(
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op.span,
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lhs.span,
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lhs.ty.clone(),
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rhs.span,
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rhs.ty.clone(),
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)),
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)
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}
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_ => {
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*op = Expression::garbage(op.span);
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(
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Type::Unknown,
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Some(ParseError::UnsupportedOperation(
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op.span,
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lhs.span,
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lhs.ty.clone(),
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rhs.span,
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rhs.ty.clone(),
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)),
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)
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}
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},
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Operator::Minus => match (&lhs.ty, &rhs.ty) {
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(Type::Int, Type::Int) => (Type::Int, None),
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(Type::Float, Type::Int) => (Type::Float, None),
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(Type::Int, Type::Float) => (Type::Float, None),
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(Type::Float, Type::Float) => (Type::Float, None),
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(Type::Unknown, _) => (Type::Unknown, None),
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(_, Type::Unknown) => (Type::Unknown, None),
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_ => {
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*op = Expression::garbage(op.span);
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(
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Type::Unknown,
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Some(ParseError::UnsupportedOperation(
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op.span,
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lhs.span,
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lhs.ty.clone(),
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rhs.span,
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rhs.ty.clone(),
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)),
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)
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}
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},
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Operator::Multiply => match (&lhs.ty, &rhs.ty) {
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(Type::Int, Type::Int) => (Type::Int, None),
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(Type::Float, Type::Int) => (Type::Float, None),
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(Type::Int, Type::Float) => (Type::Float, None),
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(Type::Float, Type::Float) => (Type::Float, None),
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(Type::Unknown, _) => (Type::Unknown, None),
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(_, Type::Unknown) => (Type::Unknown, None),
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_ => {
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*op = Expression::garbage(op.span);
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(
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Type::Unknown,
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Some(ParseError::UnsupportedOperation(
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op.span,
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lhs.span,
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lhs.ty.clone(),
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rhs.span,
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rhs.ty.clone(),
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)),
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)
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}
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},
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Operator::Divide => match (&lhs.ty, &rhs.ty) {
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(Type::Int, Type::Int) => (Type::Int, None),
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(Type::Float, Type::Int) => (Type::Float, None),
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(Type::Int, Type::Float) => (Type::Float, None),
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(Type::Float, Type::Float) => (Type::Float, None),
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(Type::Unknown, _) => (Type::Unknown, None),
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(_, Type::Unknown) => (Type::Unknown, None),
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_ => {
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*op = Expression::garbage(op.span);
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(
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Type::Unknown,
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Some(ParseError::UnsupportedOperation(
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op.span,
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lhs.span,
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lhs.ty.clone(),
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rhs.span,
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rhs.ty.clone(),
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)),
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)
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}
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},
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Operator::LessThan => match (&lhs.ty, &rhs.ty) {
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(Type::Int, Type::Int) => (Type::Bool, None),
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(Type::Float, Type::Int) => (Type::Bool, None),
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(Type::Int, Type::Float) => (Type::Bool, None),
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(Type::Float, Type::Float) => (Type::Bool, None),
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(Type::Unknown, _) => (Type::Bool, None),
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(_, Type::Unknown) => (Type::Bool, None),
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_ => {
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*op = Expression::garbage(op.span);
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(
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Type::Unknown,
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Some(ParseError::UnsupportedOperation(
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op.span,
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lhs.span,
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lhs.ty.clone(),
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rhs.span,
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rhs.ty.clone(),
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)),
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)
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}
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},
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Operator::LessThanOrEqual => match (&lhs.ty, &rhs.ty) {
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(Type::Int, Type::Int) => (Type::Bool, None),
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(Type::Float, Type::Int) => (Type::Bool, None),
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(Type::Int, Type::Float) => (Type::Bool, None),
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(Type::Float, Type::Float) => (Type::Bool, None),
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(Type::Unknown, _) => (Type::Bool, None),
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(_, Type::Unknown) => (Type::Bool, None),
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_ => {
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*op = Expression::garbage(op.span);
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(
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Type::Unknown,
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Some(ParseError::UnsupportedOperation(
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op.span,
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lhs.span,
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lhs.ty.clone(),
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rhs.span,
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rhs.ty.clone(),
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)),
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)
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}
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},
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Operator::GreaterThan => match (&lhs.ty, &rhs.ty) {
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(Type::Int, Type::Int) => (Type::Bool, None),
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(Type::Float, Type::Int) => (Type::Bool, None),
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(Type::Int, Type::Float) => (Type::Bool, None),
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(Type::Float, Type::Float) => (Type::Bool, None),
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(Type::Unknown, _) => (Type::Bool, None),
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(_, Type::Unknown) => (Type::Bool, None),
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_ => {
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*op = Expression::garbage(op.span);
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(
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Type::Unknown,
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Some(ParseError::UnsupportedOperation(
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op.span,
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lhs.span,
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lhs.ty.clone(),
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rhs.span,
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rhs.ty.clone(),
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)),
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)
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}
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},
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Operator::GreaterThanOrEqual => match (&lhs.ty, &rhs.ty) {
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(Type::Int, Type::Int) => (Type::Bool, None),
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(Type::Float, Type::Int) => (Type::Bool, None),
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(Type::Int, Type::Float) => (Type::Bool, None),
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(Type::Float, Type::Float) => (Type::Bool, None),
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(Type::Unknown, _) => (Type::Bool, None),
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(_, Type::Unknown) => (Type::Bool, None),
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_ => {
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*op = Expression::garbage(op.span);
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(
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Type::Unknown,
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Some(ParseError::UnsupportedOperation(
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op.span,
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lhs.span,
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lhs.ty.clone(),
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rhs.span,
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rhs.ty.clone(),
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)),
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)
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}
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},
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Operator::Equal => match (&lhs.ty, &rhs.ty) {
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(Type::Float, Type::Int) => (Type::Bool, None),
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(Type::Int, Type::Float) => (Type::Bool, None),
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(x, y) if x == y => (Type::Bool, None),
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(Type::Unknown, _) => (Type::Bool, None),
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(_, Type::Unknown) => (Type::Bool, None),
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_ => {
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*op = Expression::garbage(op.span);
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(
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Type::Unknown,
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Some(ParseError::UnsupportedOperation(
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op.span,
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lhs.span,
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lhs.ty.clone(),
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rhs.span,
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rhs.ty.clone(),
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)),
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)
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}
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},
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Operator::NotEqual => match (&lhs.ty, &rhs.ty) {
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(Type::Int, Type::Int) => (Type::Bool, None),
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(Type::Float, Type::Int) => (Type::Bool, None),
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(Type::Int, Type::Float) => (Type::Bool, None),
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(Type::Float, Type::Float) => (Type::Bool, None),
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(Type::Unknown, _) => (Type::Bool, None),
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(_, Type::Unknown) => (Type::Bool, None),
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_ => {
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*op = Expression::garbage(op.span);
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(
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Type::Unknown,
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Some(ParseError::UnsupportedOperation(
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op.span,
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lhs.span,
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lhs.ty.clone(),
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rhs.span,
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rhs.ty.clone(),
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)),
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)
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}
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},
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_ => {
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*op = Expression::garbage(op.span);
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(
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Type::Unknown,
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Some(ParseError::UnsupportedOperation(
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op.span,
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lhs.span,
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lhs.ty.clone(),
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rhs.span,
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rhs.ty.clone(),
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)),
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)
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}
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},
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_ => {
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*op = Expression::garbage(op.span);
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(
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Type::Unknown,
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Some(ParseError::IncompleteMathExpression(op.span)),
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)
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}
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}
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}
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}
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