Method parse

compiler/src/modules/parser/mod.rs:519–555

(mut self)

    }

    pub fn parse(mut self) -> (SSAChunk, Vec<Diagnostic>) {
        while !self.at_end() {
            while self.eat_if(TokenType::Semi) {}
            if self.at_end() { break; }

            let produced_value = self.stmt();
            // Pop expression-statement results; chunk's implicit ReturnValue expects empty stack.
            if produced_value { self.chunk.emit(OpCode::PopTop, 0); }
        }

        if self.chunk.overflow {
            let n = self.source.len();
            self.errors.push(Diagnostic {
                start: n, end: n,
                msg: "program too large: exceeded maximum instruction limit".to_string(),
            });
        }

        if !self.errors.is_empty() {
            // Clear bytecode state so `finalize_prev_slots` doesn't use stale phi sources.
            self.chunk.instructions.clear();
            self.chunk.constants.clear();
            self.chunk.names.clear();
            self.chunk.phi_sources.clear();
            self.chunk.phi_map.clear();
            self.chunk.functions.clear();
            self.chunk.classes.clear();
            self.chunk.name_index.clear();
            self.chunk.nonlocals.clear();
            self.chunk.stmt_pos.clear();
            self.loop_kinds.clear();
        }

        self.chunk.emit(OpCode::ReturnValue, 0);
        self.chunk.finalize_prev_slots();
        (self.chunk, self.errors)
    }
}