P001 -- Parser Error¶

The tokens are valid but the sequence does not match the grammar. Messages have the shape expected X, found Y and point at the offending token.

Examples¶

Unbalanced delimiter:

fn main() {
  let x = (1;
}

error[P001]: 2:13: expected ')', found ;

Brace where the grammar expects a parameter identifier:

fn main( { }

error[P001]: 1:12: expected identifier, found '{'

Statements on consecutive lines without a separator:

fn main() {
  io.println("a")
  io.println("b")
}

error[P001]: 3:3: expected ';', found io

Balance every (), [] and {} pair.
Check the line and column in the message; the problem is usually the token just before or at it.
Statements end with ;; only a block's final expression may omit it. A missing separator between two statements is this error.