Examples with Expression com.google.devtools.build.lib.syntax.Expression used on opensource projects

Example 1 with Expression

use of com.google.devtools.build.lib.syntax.Expression in project bazel by bazelbuild.

the class PackageFactory method validateAssignmentStatements.

/**
   * Tests a build AST to ensure that it contains no assignment statements that
   * redefine built-in build rules.
   *
   * @param pkgEnv a package environment initialized with all of the built-in
   *        build rules
   * @param ast the build file AST to be tested
   * @param eventHandler a eventHandler where any errors should be logged
   * @return true if the build file contains no redefinitions of built-in
   *         functions
   */
// TODO(bazel-team): Remove this check. It should be moved to LValue.assign
private static boolean validateAssignmentStatements(Environment pkgEnv, BuildFileAST ast, EventHandler eventHandler) {
    for (Statement stmt : ast.getStatements()) {
        if (stmt instanceof AssignmentStatement) {
            Expression lvalue = ((AssignmentStatement) stmt).getLValue().getExpression();
            if (!(lvalue instanceof Identifier)) {
                continue;
            }
            String target = ((Identifier) lvalue).getName();
            if (pkgEnv.hasVariable(target)) {
                eventHandler.handle(Event.error(stmt.getLocation(), "Reassignment of builtin build " + "function '" + target + "' not permitted"));
                return false;
            }
        }
    }
    return true;
}