Method evalExpr

src/test/java/net/starlark/java/eval/Examples.java:65–79

This example evaluates a Starlark expression in the specified environment and returns its value.

(String expr, ImmutableMap<String, Object> env)

   * value.
   */
  Object evalExpr(String expr, ImmutableMap<String, Object> env)
      throws SyntaxError.Exception, EvalException, InterruptedException {
    // The apparent file name (for error messages) will be "<expr>".
    ParserInput input = ParserInput.fromString(expr, "<expr>");

    // Create the module in which the expression is evaluated.
    // It may define additional predeclared environment bindings.
    Module module = Module.withPredeclared(StarlarkSemantics.DEFAULT, env);

    // Resolve, compile, and execute the expression.
    try (Mutability mu = Mutability.create(input.getFile())) {
      StarlarkThread thread = StarlarkThread.createTransient(mu, StarlarkSemantics.DEFAULT);
      return Starlark.eval(input, FileOptions.DEFAULT, module, thread);
    }
  }

  /**
   * This advanced example reads, parses, and compiles a Starlark file to a Program, then later