2019-07-06 00:08:58 +02:00
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use crate::object::base as value;
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use crate::parser::hir;
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use crate::prelude::*;
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2019-06-01 07:50:16 +02:00
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use derive_new::new;
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2019-07-08 18:44:53 +02:00
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use serde_derive::Deserialize;
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2019-05-10 18:59:12 +02:00
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2019-07-06 00:08:58 +02:00
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pub trait Type: std::fmt::Debug + Send {
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2019-07-08 18:44:53 +02:00
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type Extractor: ExtractType;
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2019-07-06 00:08:58 +02:00
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fn name(&self) -> &'static str;
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2019-07-08 18:44:53 +02:00
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fn check(&self, value: &'value Spanned<Value>) -> Result<&'value Spanned<Value>, ShellError>;
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2019-07-06 00:08:58 +02:00
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fn coerce(&self) -> Option<hir::ExpressionKindHint> {
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None
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}
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}
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2019-07-08 18:44:53 +02:00
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pub trait ExtractType: Sized {
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fn extract(value: &Spanned<Value>) -> Result<Self, ShellError>;
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fn check(value: &'value Spanned<Value>) -> Result<&'value Spanned<Value>, ShellError>;
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2019-07-06 00:08:58 +02:00
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}
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#[derive(Debug, Deserialize, Clone, Eq, PartialEq, Hash, Ord, PartialOrd, new)]
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pub struct Any;
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impl Type for Any {
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2019-07-08 18:44:53 +02:00
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type Extractor = Spanned<Value>;
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2019-07-06 00:08:58 +02:00
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fn name(&self) -> &'static str {
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"Any"
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}
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2019-07-08 18:44:53 +02:00
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fn check(&self, value: &'value Spanned<Value>) -> Result<&'value Spanned<Value>, ShellError> {
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Ok(value)
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}
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}
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impl ExtractType for Spanned<Value> {
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fn extract(value: &Spanned<Value>) -> Result<Self, ShellError> {
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Ok(value.clone())
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}
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fn check(&self, value: &'value Spanned<Value>) -> Result<&'value Spanned<Value>, ShellError> {
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2019-07-06 00:08:58 +02:00
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Ok(value)
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}
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}
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#[derive(Debug, Deserialize, Clone, Eq, PartialEq, Hash, Ord, PartialOrd, new)]
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pub struct Integer;
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impl Type for Integer {
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2019-07-08 18:44:53 +02:00
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type Extractor = i64;
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fn name(&self) -> &'static str {
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"Integer"
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}
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fn check(&self, value: &'value Spanned<Value>) -> Result<&'value Spanned<Value>, ShellError> {
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match value {
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v @ Spanned {
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item: Value::Primitive(Primitive::Int(_)),
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..
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} => Ok(v),
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other => Err(ShellError::type_error("Integer", other.spanned_type_name())),
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}
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}
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}
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impl ExtractType for i64 {
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fn extract(value: &Spanned<Value>) -> Result<i64, ShellError> {
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match value {
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&Spanned {
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item: Value::Primitive(Primitive::Int(int)),
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..
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} => Ok(int),
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other => Err(ShellError::type_error("Integer", other.spanned_type_name())),
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}
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}
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fn check(&self, value: &'value Spanned<Value>) -> Result<&'value Spanned<Value>, ShellError> {
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match value {
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v @ Spanned {
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item: Value::Primitive(Primitive::Int(_)),
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..
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} => Ok(v),
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other => Err(ShellError::type_error("Integer", other.spanned_type_name())),
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}
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}
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}
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#[derive(Debug, Deserialize, Clone, Eq, PartialEq, Hash, Ord, PartialOrd, new)]
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pub struct NuString;
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impl Type for NuString {
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type Extractor = String;
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2019-07-06 00:08:58 +02:00
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fn name(&self) -> &'static str {
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"Integer"
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}
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2019-07-08 18:44:53 +02:00
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fn check(&self, value: &'value Spanned<Value>) -> Result<&'value Spanned<Value>, ShellError> {
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2019-07-06 00:08:58 +02:00
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match value {
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v @ Spanned {
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item: Value::Primitive(Primitive::Int(_)),
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..
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} => Ok(v),
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other => Err(ShellError::type_error("Integer", other.spanned_type_name())),
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}
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}
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}
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2019-07-08 18:44:53 +02:00
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impl ExtractType for String {
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fn extract(value: &Spanned<Value>) -> Result<String, ShellError> {
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match value {
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Spanned {
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item: Value::Primitive(Primitive::String(string)),
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..
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} => Ok(string.clone()),
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other => Err(ShellError::type_error("String", other.spanned_type_name())),
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}
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}
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fn check(&self, value: &'value Spanned<Value>) -> Result<&'value Spanned<Value>, ShellError> {
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2019-07-06 00:08:58 +02:00
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match value {
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2019-07-08 18:44:53 +02:00
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v @ Spanned {
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item: Value::Primitive(Primitive::Int(_)),
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..
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} => Ok(v),
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other => Err(ShellError::type_error("Integer", other.spanned_type_name())),
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2019-07-06 00:08:58 +02:00
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}
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}
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}
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#[derive(Debug, Deserialize, Clone, Eq, PartialEq, Hash, Ord, PartialOrd, new)]
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pub struct Block;
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impl Type for Block {
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2019-07-08 18:44:53 +02:00
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type Extractor = value::Block;
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2019-07-06 00:08:58 +02:00
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fn name(&self) -> &'static str {
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"Block"
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}
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2019-07-08 18:44:53 +02:00
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fn check(&self, value: &'value Spanned<Value>) -> Result<&'value Spanned<Value>, ShellError> {
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2019-07-06 00:08:58 +02:00
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match value {
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v @ Spanned {
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item: Value::Block(_),
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..
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} => Ok(v),
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other => Err(ShellError::type_error("Block", other.spanned_type_name())),
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}
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}
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}
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2019-07-08 18:44:53 +02:00
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impl ExtractType for value::Block {
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fn extract(value: &Spanned<Value>) -> Result<value::Block, ShellError> {
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match value {
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Spanned {
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item: Value::Block(block),
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..
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} => Ok(block.clone()),
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other => Err(ShellError::type_error("Block", other.spanned_type_name())),
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}
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}
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fn check(&self, value: &'value Spanned<Value>) -> Result<&'value Spanned<Value>, ShellError> {
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2019-07-06 00:08:58 +02:00
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match value {
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2019-07-08 18:44:53 +02:00
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v @ Spanned {
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item: Value::Block(_),
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..
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} => Ok(v),
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other => Err(ShellError::type_error("Block", other.spanned_type_name())),
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2019-07-06 00:08:58 +02:00
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}
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}
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2019-05-15 18:12:38 +02:00
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}
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