@fink/prattler/cjs/errors.js

A generic Pratt/top down operator precedence parser.

const {
  highlight_code_loc
} = require("@fink/snippet/highlight.js");

const {
  stack_trace
} = require("@fink/std-lib/stack-trace.js");

const get_error = (ctx, msg, token, stack_func) => {
  const {
    code,
    filename
  } = ctx;
  const {
    start: {
      line,
      column
    }
  } = token.loc;
  // TODO: use error from std-lib?
  const error = {
    error: `${filename}:${line}:${column}
${highlight_code_loc(code, token.loc)}

${msg}
`,
    token,
    stack: stack_trace(stack_func)
  };
  return error;
};

exports.get_error = get_error;

const add_error = (ctx, msg, token) => {
  const error = get_error(ctx, msg, token, add_error);
  return [error, { ...ctx,
    errors: [...ctx.errors, error]
  }];
};

exports.add_error = add_error;