package main

file tpl.gop
noEntrypoint
ast.FuncDecl:
  Name:
    ast.Ident:
      Name: main
  Type:
    ast.FuncType:
      Params:
        ast.FieldList:
  Body:
    ast.BlockStmt:
      List:
        ast.AssignStmt:
          Lhs:
            ast.Ident:
              Name: cl
          Tok: :=
          Rhs:
            ast.ErrWrapExpr:
              X:
                ast.DomainTextLit:
                  Domain:
                    ast.Ident:
                      Name: tpl
                  Value: `
expr = termExpr % ("+" | "-")

termExpr = unaryExpr % ("*" | "/")

unaryExpr = operand | "-" unaryExpr

operand = INT | FLOAT | "(" expr ")"
`
              Tok: !