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use super::Interpreter;
use crate::{
config::cfg::EnumRepresentation,
error::E,
interpreter::{ts::Writer, Offset},
nature::{Composite, Nature, Natures, Referred},
};
use std::ops::Deref;
impl Interpreter for Referred {
fn declaration(
&self,
natures: &Natures,
buf: &mut Writer,
offset: Offset,
parent: Option<String>,
) -> Result<(), E> {
match self {
Referred::Enum(name, _context, variants, repres) => {
if let Some(module) = natures.get_module_of(name) {
if natures.exists_in_module(name, &module) {
buf.add_export(name, &module)?;
}
}
let flat = Referred::is_flat_varians(variants)?;
if flat {
buf.push(format!("{offset}export enum {name} {{\n",));
for variant in variants.iter() {
variant.declaration(natures, buf, offset.inc(), Some(name.to_owned()))?;
buf.push(",\n");
}
buf.push(format!("{offset}}}\n",));
} else {
match repres {
EnumRepresentation::Flat => {
buf.push(format!("{offset}export interface {name} {{\n",));
for variant in variants.iter() {
variant.declaration(
natures,
buf,
offset.inc(),
Some(name.to_owned()),
)?;
buf.push(";\n");
}
buf.push(format!("{offset}}}\n",));
}
EnumRepresentation::Union | EnumRepresentation::DiscriminatedUnion => {
buf.push(format!("{offset}export type {name} =\n",));
for (n, variant) in variants.iter().enumerate() {
variant.declaration(
natures,
buf,
offset.inc(),
Some(name.to_owned()),
)?;
buf.push(if n == variants.len() - 1 { "" } else { " |\n" });
}
buf.push(format!("{offset};\n",));
}
}
}
}
Referred::EnumVariant(name, _context, fields, flat, repres) => {
let named = fields
.iter()
.any(|f| matches!(f, Nature::Referred(Referred::Field(..))));
if fields.is_empty() {
if *flat {
buf.push(format!("{offset}{name}"));
} else {
match repres {
EnumRepresentation::Flat => {
buf.push(format!("{offset}{name}?: null"));
}
EnumRepresentation::Union => {
buf.push(format!("{offset}{{ {name}: null }}"));
}
EnumRepresentation::DiscriminatedUnion => {
buf.push(format!("{offset}\"{name}\""));
}
}
}
} else if fields.len() == 1 {
match repres {
EnumRepresentation::Flat => {
buf.push(format!("{offset}{name}?: "));
}
EnumRepresentation::Union | EnumRepresentation::DiscriminatedUnion => {
buf.push(format!(
"{offset}{{{}{name}: ",
if named {
format!("\n{}", offset.inc())
} else {
" ".to_owned()
}
));
}
}
if named {
buf.push("{\n");
}
fields
.first()
.ok_or(E::Parsing(String::from(
"Expecting single field for Variant",
)))?
.reference(
natures,
buf,
match repres {
EnumRepresentation::Flat => offset.inc(),
EnumRepresentation::Union
| EnumRepresentation::DiscriminatedUnion => offset.inc().inc(),
},
parent,
)?;
if named {
buf.push(format!(
"\n{}}}",
match repres {
EnumRepresentation::Flat => offset.clone(),
EnumRepresentation::Union
| EnumRepresentation::DiscriminatedUnion => {
offset.inc()
}
}
));
}
match repres {
EnumRepresentation::Flat => {}
EnumRepresentation::Union | EnumRepresentation::DiscriminatedUnion => {
buf.push(if named {
format!("\n{offset}}}",)
} else {
" }".to_owned()
});
}
}
} else {
match repres {
EnumRepresentation::Flat => {
buf.push(format!(
"{offset}{name}?: {}",
if named { "{\n" } else { "[" }
));
}
EnumRepresentation::Union | EnumRepresentation::DiscriminatedUnion => {
buf.push(format!(
"{offset}{{{}{name}: {}",
if named {
format!("\n{}", offset.inc())
} else {
" ".to_owned()
},
if named { "{\n" } else { "[" }
));
}
}
for (i, field) in fields.iter().enumerate() {
field.reference(
natures,
buf,
match repres {
EnumRepresentation::Flat => offset.inc(),
EnumRepresentation::Union
| EnumRepresentation::DiscriminatedUnion => offset.inc().inc(),
},
parent.clone(),
)?;
if i < fields.len() - 1 {
buf.push(if named { ";\n" } else { "," });
}
}
buf.push(if named {
format!(
"\n{}}}",
match repres {
EnumRepresentation::Flat => offset.clone(),
EnumRepresentation::Union
| EnumRepresentation::DiscriminatedUnion => {
offset.inc()
}
}
)
} else {
"]".to_owned()
});
match repres {
EnumRepresentation::Flat => {}
EnumRepresentation::Union | EnumRepresentation::DiscriminatedUnion => {
buf.push(if named {
format!("\n{offset}}}",)
} else {
" }".to_owned()
});
}
}
}
}
Referred::Field(name, context, ..) => {
buf.push(format!("{}: ", context.rename_field(name)?))
}
Referred::Func(name, context, func) => {
if let Nature::Composite(Composite::Func(_, args, out, asyncness, constructor)) =
func.deref()
{
if *constructor {
return Err(E::Parsing(
"Cannot declare constructor for abstract class".to_string(),
));
}
buf.push(format!(
"{}export declare function {}(",
offset,
context.rename_method(name)?
));
for (i, ty) in args.iter().enumerate() {
ty.declaration(natures, buf, Offset::new(), Some(name.to_owned()))?;
if i < args.len() - 1 {
buf.push(", ");
}
}
buf.push("): ");
if *asyncness {
buf.push("Promise<");
}
if let Some(out) = out {
out.reference(natures, buf, offset.clone(), Some(name.to_owned()))?;
} else {
buf.push("void");
}
if *asyncness {
buf.push(">");
}
buf.push(";\n");
} else {
return Err(E::Parsing(format!("Cannot find body of function {name}")));
}
}
Referred::FuncArg(name, _context, nature, _) => {
buf.push(format!("{name}: "));
nature.reference(natures, buf, offset.clone(), parent)?;
}
Referred::Struct(name, context, fields) => {
buf.push(format!(
"{offset}{} {name} {{\n",
if context.as_class() {
"export abstract class"
} else {
"export interface"
},
));
if let Some(module) = natures.get_module_of(name) {
if natures.exists_in_module(name, &module) {
buf.add_export(name, &module)?;
}
}
for field in fields {
if context.as_class() && field.is_method_constructor() {
continue;
}
if field.is_field_ignored() {
continue;
}
field.reference(natures, buf, offset.inc(), Some(name.to_owned()))?;
buf.push(";\n");
}
buf.push(format!("{offset}}}\n",));
}
Referred::TupleStruct(name, _context, field) => {
buf.push(format!("{offset}export type {name} = ",));
if let Some(module) = natures.get_module_of(name) {
if natures.exists_in_module(name, &module) {
buf.add_export(name, &module)?;
}
}
if let Some(field) = field {
field.reference(natures, buf, Offset::new(), Some(name.to_owned()))?;
} else {
buf.push("undefined");
}
buf.push(";\n");
}
Referred::Constant(name, _context, _ty, value) => {
buf.push(format!("{offset}export const {name} = {value};\n",));
}
Referred::Ref(ref_name, ..) => {
return Err(E::Parsing(format!("Reference {ref_name} can be declared")));
}
Referred::Generic(alias, ..) => {
return Err(E::Parsing(format!(
"Generic type cannot be rendered out of context; type alias = {alias}"
)))
}
}
Ok(())
}
fn reference(
&self,
natures: &Natures,
buf: &mut Writer,
offset: Offset,
parent: Option<String>,
) -> Result<(), E> {
match self {
Referred::Enum(name, ..) => buf.push(name),
Referred::EnumVariant(name, ..) => buf.push(format!("{offset}{name}")),
Referred::Field(name, context, nature, _) => {
if let Nature::Composite(Composite::Func(_, _, _, _, constructor)) = nature.deref()
{
if *constructor {
if context.as_class() {
return Ok(());
}
buf.push(format!("{offset}constructor"));
} else {
buf.push(format!(
"{offset}{}{}",
if context.as_class() {
"public abstract "
} else {
""
},
context.rename_method(name)?,
));
}
nature.reference(natures, buf, offset, parent)?;
} else {
if name.is_empty() {
// This is name of unnamed field of TupleStruct
buf.push(&(context.rename_field(name)?));
} else {
buf.push(format!("{offset}{}: ", context.rename_field(name)?));
if let Nature::Referred(Referred::Ref(ref_name, _)) = nature.deref() {
if let Some(generic) = context.get_generic(ref_name) {
generic.reference(natures, buf, offset, parent)?;
return Ok(());
}
}
}
nature.reference(natures, buf, offset, parent)?;
}
}
Referred::Func(name, ..) => buf.push(name),
Referred::FuncArg(name, ..) => {
return Err(E::Parsing(format!(
"Function argument {name} can be refered"
)));
}
Referred::Struct(name, ..) => buf.push(name),
Referred::TupleStruct(name, ..) => buf.push(name),
Referred::Ref(ref_name, ..) => {
if let Some(module) = parent.and_then(|p| natures.get_module_of(&p)) {
if let (Some(ref_mod), false) = (
natures.get_module_of(ref_name),
natures.exists_in_module(ref_name, &module),
) {
buf.add_import(ref_name, ref_mod)?;
}
if natures.exists_in_module(ref_name, &module) {
buf.add_export(ref_name, &module)?;
}
}
buf.push(ref_name)
}
Referred::Constant(name, ..) => {
return Err(E::Parsing(format!("Constant {name} can be refered")));
}
Referred::Generic(alias, ..) => {
return Err(E::Parsing(format!(
"Generic type cannot be rendered out of context; type alias = {alias}"
)))
}
}
Ok(())
}
}