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Read in AST takes Assignable instead of Ident

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Erin 2021-10-23 21:53:21 +02:00 committed by ondra05
parent bcd446c5d1
commit ae1416e329
3 changed files with 18 additions and 9 deletions
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2
ablescript/src/ast.rs
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@ -144,7 +144,7 @@ pub enum StmtKind {
args: Vec<Expr>, args: Vec<Expr>,
}, },
Print(Expr), Print(Expr),
Read(Ident), Read(Assignable),
Melo(Ident), Melo(Ident),
Rlyeh, Rlyeh,
Rickroll, Rickroll,

11
ablescript/src/interpret.rs
View file

@ -280,14 +280,21 @@ impl ExecEnv {
.write_all(include_str!("rickroll").as_bytes()) .write_all(include_str!("rickroll").as_bytes())
.expect("Failed to write to stdout"); .expect("Failed to write to stdout");
} }
StmtKind::Read(ident) => { StmtKind::Read(assignable) => {
let mut value = 0; let mut value = 0;
for _ in 0..READ_BITS { for _ in 0..READ_BITS {
value <<= 1; value <<= 1;
value += self.get_bit()? as i32; value += self.get_bit()? as i32;
} }
self.get_var_mut(ident)?.value.replace(Value::Int(value)); match assignable.kind {
AssignableKind::Variable => {
self.get_var_mut(&assignable.ident)?
.value
.replace(Value::Int(value));
}
AssignableKind::Index { .. } => todo!(),
}
} }
} }

14
ablescript/src/parser.rs
View file

@ -370,12 +370,14 @@ impl<'source> Parser<'source> {
// Read input // Read input
Token::Read => { Token::Read => {
if let Some(Expr { if let Some(Ok(assignable)) = buf.take().map(Assignable::from_expr) {
kind: ExprKind::Variable(ident), self.require(Token::Semicolon)?;
span, break StmtKind::Read(assignable);
}) = buf } else {
{ return Err(Error::new(
break self.semi_terminated(StmtKind::Read(Ident::new(ident, span)))?; ErrorKind::UnexpectedToken(Token::Read),
self.lexer.span(),
));
} }
} }