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use crate::ts_type::TsTypeDef;
use serde::Serialize;
use std::fmt::{Display, Formatter, Result as FmtResult};
use swc_ecmascript::ast::TsTypeParam;
use swc_ecmascript::ast::TsTypeParamDecl;
#[derive(Debug, Serialize, Clone)]
#[serde(rename_all = "camelCase")]
pub struct TsTypeParamDef {
pub name: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub constraint: Option<TsTypeDef>,
#[serde(skip_serializing_if = "Option::is_none")]
pub default: Option<TsTypeDef>,
}
impl Display for TsTypeParamDef {
fn fmt(&self, f: &mut Formatter<'_>) -> FmtResult {
write!(f, "{}", self.name)?;
if let Some(constraint) = &self.constraint {
write!(f, " extends {}", constraint)?;
}
if let Some(default) = &self.default {
write!(f, " = {}", default)?;
}
Ok(())
}
}
impl Into<TsTypeParamDef> for &TsTypeParam {
fn into(self) -> TsTypeParamDef {
let name = self.name.sym.to_string();
let constraint: Option<TsTypeDef> =
if let Some(ts_type) = self.constraint.as_ref() {
let type_def: TsTypeDef = (&**ts_type).into();
Some(type_def)
} else {
None
};
let default: Option<TsTypeDef> =
if let Some(ts_type) = self.default.as_ref() {
let type_def: TsTypeDef = (&**ts_type).into();
Some(type_def)
} else {
None
};
TsTypeParamDef {
name,
constraint,
default,
}
}
}
pub fn maybe_type_param_decl_to_type_param_defs(
maybe_type_param_decl: Option<&TsTypeParamDecl>,
) -> Vec<TsTypeParamDef> {
if let Some(type_params_decl) = maybe_type_param_decl {
type_params_decl
.params
.iter()
.map(|type_param| type_param.into())
.collect::<Vec<TsTypeParamDef>>()
} else {
vec![]
}
}