tseeker-pub/rust-crafting-interpreters-part-1
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Parser - Read superclass name

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This commit is contained in:
Emmanuel BENOîT 2023-01-15 17:51:38 +01:00
parent 164e7952bd
commit 33c28db780
1 changed files with 6 additions and 1 deletions
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7
src/parser.rs
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@ -225,6 +225,11 @@ impl Parser {
/// ``` /// ```
fn parse_class(&mut self) -> SloxResult<StmtNode> { fn parse_class(&mut self) -> SloxResult<StmtNode> {
let name = self.consume_identifier("expected class name")?; let name = self.consume_identifier("expected class name")?;
let superclass = match self.expect(&[TokenType::Less]) {
None => None,
Some(_) => Some(self.consume_identifier("expected superclass name")?),
};
self.consume(&TokenType::LeftBrace, "'{' expected")?; self.consume(&TokenType::LeftBrace, "'{' expected")?;
let mut members = Vec::new(); let mut members = Vec::new();
while !self.check(&TokenType::RightBrace) && !self.is_at_end() { while !self.check(&TokenType::RightBrace) && !self.is_at_end() {
@ -259,7 +264,7 @@ impl Parser {
Ok(StmtNode::ClassDecl(ClassDecl { Ok(StmtNode::ClassDecl(ClassDecl {
name, name,
superclass: None, superclass,
members, members,
})) }))
} }