function compileToFunctions()

in web-ui/src/js/vue.js [9302:9382]
63 lines of code
14 McCabe index (conditional complexity)

  function compileToFunctions (
    template,
    options,
    vm
  ) {
    options = options || {};

    /* istanbul ignore if */
    {
      // detect possible CSP restriction
      try {
        new Function('return 1');
      } catch (e) {
        if (e.toString().match(/unsafe-eval|CSP/)) {
          warn(
            'It seems you are using the standalone build of Vue.js in an ' +
            'environment with Content Security Policy that prohibits unsafe-eval. ' +
            'The template compiler cannot work in this environment. Consider ' +
            'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
            'templates into render functions.'
          );
        }
      }
    }

    // check cache
    var key = options.delimiters
      ? String(options.delimiters) + template
      : template;
    if (functionCompileCache[key]) {
      return functionCompileCache[key]
    }

    // compile
    var compiled = compile(template, options);

    // check compilation errors/tips
    {
      if (compiled.errors && compiled.errors.length) {
        warn(
          "Error compiling template:\n\n" + template + "\n\n" +
          compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
          vm
        );
      }
      if (compiled.tips && compiled.tips.length) {
        compiled.tips.forEach(function (msg) { return tip(msg, vm); });
      }
    }

    // turn code into functions
    var res = {};
    var fnGenErrors = [];
    res.render = makeFunction(compiled.render, fnGenErrors);
    var l = compiled.staticRenderFns.length;
    res.staticRenderFns = new Array(l);
    for (var i = 0; i < l; i++) {
      res.staticRenderFns[i] = makeFunction(compiled.staticRenderFns[i], fnGenErrors);
    }

    // check function generation errors.
    // this should only happen if there is a bug in the compiler itself.
    // mostly for codegen development use
    /* istanbul ignore if */
    {
      if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
        warn(
          "Failed to generate render function:\n\n" +
          fnGenErrors.map(function (ref) {
            var err = ref.err;
            var code = ref.code;

            return ((err.toString()) + " in\n\n" + code + "\n");
        }).join('\n'),
          vm
        );
      }
    }

    return (functionCompileCache[key] = res)
  }