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use wast::parser::{Cursor, Parse, Parser, Peek, Result};
use crate::{Atom, Expr, FunctionSectionEntry, SExpr};
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct InlineExport {
name: String,
}
impl InlineExport {
pub fn new(name: String) -> Self {
Self { name }
}
}
impl SExpr for InlineExport {
fn car(&self) -> String {
"export".to_owned()
}
fn cdr(&self) -> Vec<Expr> {
vec![Expr::Atom(Atom::new(format!(r#""{}""#, self.name)))]
}
}
impl Parse<'_> for InlineExport {
fn parse(parser: Parser<'_>) -> Result<Self> {
parser.parse::<wast::kw::export>()?;
let name = parser.parse::<String>()?;
Ok(Self { name })
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Export {
name: String,
desc: ExportDesc,
}
impl Export {
pub fn new(name: String, desc: ExportDesc) -> Self {
Self { name, desc }
}
}
impl SExpr for Export {
fn car(&self) -> String {
"export".to_owned()
}
fn cdr(&self) -> Vec<Expr> {
vec![
Expr::Atom(Atom::new(format!(r#""{}""#, self.name))),
Expr::SExpr(Box::new(self.desc.clone())),
]
}
}
impl Parse<'_> for Export {
fn parse(parser: Parser<'_>) -> Result<Self> {
parser.parse::<wast::kw::export>()?;
let name = parser.parse::<String>()?;
let desc = parser.parse::<ExportDesc>()?;
Ok(Self { name, desc })
}
}
impl Peek for Export {
fn peek(cursor: Cursor<'_>) -> bool {
cursor.integer().is_some()
}
fn display() -> &'static str {
"integer"
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum ExportDesc {
Func(Box<FunctionSectionEntry>),
}
impl SExpr for ExportDesc {
fn car(&self) -> String {
match self {
Self::Func(f) => f.car(),
}
}
fn cdr(&self) -> Vec<Expr> {
match self {
Self::Func(f) => f.cdr(),
}
}
}
impl Parse<'_> for ExportDesc {
fn parse(parser: Parser<'_>) -> Result<Self> {
let mut l = parser.lookahead1();
if l.peek::<wast::kw::func>() {
Ok(Self::Func(Box::new(
parser.parse::<FunctionSectionEntry>()?,
)))
} else {
Err(l.error())
}
}
}