C++ StringRef::trim方法代码示例

Error
OptionValueArch::SetValueFromString (llvm::StringRef value, VarSetOperationType op)
{
    Error error;
    switch (op)
    {
    case eVarSetOperationClear:
        Clear();
        NotifyValueChanged();
        break;
        
    case eVarSetOperationReplace:
    case eVarSetOperationAssign:
        {
            std::string value_str = value.trim().str();
            if (m_current_value.SetTriple (value_str.c_str()))
            {
                m_value_was_set = true;
                NotifyValueChanged();
            }
            else
                error.SetErrorStringWithFormat("unsupported architecture '%s'", value_str.c_str());
            break;
        }
    case eVarSetOperationInsertBefore:
    case eVarSetOperationInsertAfter:
    case eVarSetOperationRemove:
    case eVarSetOperationAppend:
    case eVarSetOperationInvalid:
        error = OptionValue::SetValueFromString (value, op);
        break;
    }
    return error;
}

Status OptionValueUInt64::SetValueFromString(llvm::StringRef value_ref,
                                             VarSetOperationType op) {
  Status error;
  switch (op) {
  case eVarSetOperationClear:
    Clear();
    NotifyValueChanged();
    break;

  case eVarSetOperationReplace:
  case eVarSetOperationAssign: {
    bool success = false;
    std::string value_str = value_ref.trim().str();
    uint64_t value = StringConvert::ToUInt64(value_str.c_str(), 0, 0, &success);
    if (success) {
      m_value_was_set = true;
      m_current_value = value;
      NotifyValueChanged();
    } else {
      error.SetErrorStringWithFormat("invalid uint64_t string value: '%s'",
                                     value_str.c_str());
    }
  } break;

  case eVarSetOperationInsertBefore:
  case eVarSetOperationInsertAfter:
  case eVarSetOperationRemove:
  case eVarSetOperationAppend:
  case eVarSetOperationInvalid:
    error = OptionValue::SetValueFromString(value_ref, op);
    break;
  }
  return error;
}

void MetaSema::actOnShellCommand(llvm::StringRef commandLine) const {
    llvm::StringRef trimmed(commandLine.trim(" \t\n\v\f\r "));
    if (!trimmed.empty()) {
        int ret = std::system(trimmed.str().c_str());
        (void) ret; // Silence warning unused return result of system.
    }
}

llvm::Optional<TextEdit>
IncludeInserter::insert(llvm::StringRef VerbatimHeader) const {
  llvm::Optional<TextEdit> Edit = None;
  if (auto Insertion = Inserter.insert(VerbatimHeader.trim("\"<>"),
                                       VerbatimHeader.startswith("<")))
    Edit = replacementToEdit(Code, *Insertion);
  return Edit;
}

Status OptionValueFormatEntity::SetValueFromString(llvm::StringRef value_str,
                                                   VarSetOperationType op) {
  Status error;
  switch (op) {
  case eVarSetOperationClear:
    Clear();
    NotifyValueChanged();
    break;

  case eVarSetOperationReplace:
  case eVarSetOperationAssign: {
    // Check if the string starts with a quote character after removing leading
    // and trailing spaces. If it does start with a quote character, make sure
    // it ends with the same quote character and remove the quotes before we
    // parse the format string. If the string doesn't start with a quote, leave
    // the string alone and parse as is.
    llvm::StringRef trimmed_value_str = value_str.trim();
    if (!trimmed_value_str.empty()) {
      const char first_char = trimmed_value_str[0];
      if (first_char == '"' || first_char == '\'') {
        const size_t trimmed_len = trimmed_value_str.size();
        if (trimmed_len == 1 || value_str[trimmed_len - 1] != first_char) {
          error.SetErrorStringWithFormat("mismatched quotes");
          return error;
        }
        value_str = trimmed_value_str.substr(1, trimmed_len - 2);
      }
    }
    FormatEntity::Entry entry;
    error = FormatEntity::Parse(value_str, entry);
    if (error.Success()) {
      m_current_entry = std::move(entry);
      m_current_format = value_str;
      m_value_was_set = true;
      NotifyValueChanged();
    }
  } break;

  case eVarSetOperationInsertBefore:
  case eVarSetOperationInsertAfter:
  case eVarSetOperationRemove:
  case eVarSetOperationAppend:
  case eVarSetOperationInvalid:
    error = OptionValue::SetValueFromString(value_str, op);
    break;
  }
  return error;
}

Error OptionValueEnumeration::SetValueFromString(llvm::StringRef value,
                                                 VarSetOperationType op) {
  Error error;
  switch (op) {
  case eVarSetOperationClear:
    Clear();
    NotifyValueChanged();
    break;

  case eVarSetOperationReplace:
  case eVarSetOperationAssign: {
    ConstString const_enumerator_name(value.trim());
    const EnumerationMapEntry *enumerator_entry =
        m_enumerations.FindFirstValueForName(
            const_enumerator_name.GetStringRef());
    if (enumerator_entry) {
      m_current_value = enumerator_entry->value.value;
      NotifyValueChanged();
    } else {
      StreamString error_strm;
      error_strm.Printf("invalid enumeration value '%s'", value.str().c_str());
      const size_t count = m_enumerations.GetSize();
      if (count) {
        error_strm.Printf(", valid values are: %s",
                          m_enumerations.GetCStringAtIndex(0).str().c_str());
        for (size_t i = 1; i < count; ++i) {
          error_strm.Printf(", %s",
                            m_enumerations.GetCStringAtIndex(i).str().c_str());
        }
      }
      error.SetErrorString(error_strm.GetData());
    }
    break;
  }

  case eVarSetOperationInsertBefore:
  case eVarSetOperationInsertAfter:
  case eVarSetOperationRemove:
  case eVarSetOperationAppend:
  case eVarSetOperationInvalid:
    error = OptionValue::SetValueFromString(value, op);
    break;
  }
  return error;
}

Error
OptionValueFileSpec::SetValueFromString (llvm::StringRef value,
        VarSetOperationType op)
{
    Error error;
    switch (op)
    {
    case eVarSetOperationClear:
        Clear ();
        NotifyValueChanged();
        break;

    case eVarSetOperationReplace:
    case eVarSetOperationAssign:
        if (value.size() > 0)
        {
            // The setting value may have whitespace, double-quotes, or single-quotes around the file
            // path to indicate that internal spaces are not word breaks.  Strip off any ws & quotes
            // from the start and end of the file path - we aren't doing any word // breaking here so
            // the quoting is unnecessary.  NB this will cause a problem if someone tries to specify
            // a file path that legitimately begins or ends with a " or ' character, or whitespace.
            value = value.trim("\"' \t");
            m_value_was_set = true;
            m_current_value.SetFile(value.str().c_str(), m_resolve);
            m_data_sp.reset();
            m_data_mod_time.Clear();
            NotifyValueChanged();
        }
        else
        {
            error.SetErrorString("invalid value string");
        }
        break;

    case eVarSetOperationInsertBefore:
    case eVarSetOperationInsertAfter:
    case eVarSetOperationRemove:
    case eVarSetOperationAppend:
    case eVarSetOperationInvalid:
        error = OptionValue::SetValueFromString (value, op);
        break;
    }
    return error;
}

Status OptionValueLanguage::SetValueFromString(llvm::StringRef value,
                                               VarSetOperationType op) {
  Status error;
  switch (op) {
  case eVarSetOperationClear:
    Clear();
    break;

  case eVarSetOperationReplace:
  case eVarSetOperationAssign: {
    ConstString lang_name(value.trim());
    std::set<lldb::LanguageType> languages_for_types;
    std::set<lldb::LanguageType> languages_for_expressions;
    Language::GetLanguagesSupportingTypeSystems(languages_for_types,
                                                languages_for_expressions);

    LanguageType new_type =
        Language::GetLanguageTypeFromString(lang_name.GetStringRef());
    if (new_type && languages_for_types.count(new_type)) {
      m_value_was_set = true;
      m_current_value = new_type;
    } else {
      StreamString error_strm;
      error_strm.Printf("invalid language type '%s', ", value.str().c_str());
      error_strm.Printf("valid values are:\n");
      for (lldb::LanguageType language : languages_for_types) {
        error_strm.Printf("%s%s%s", "    ",
                          Language::GetNameForLanguageType(language), "\n");
      }
      error.SetErrorString(error_strm.GetString());
    }
  } break;

  case eVarSetOperationInsertBefore:
  case eVarSetOperationInsertAfter:
  case eVarSetOperationRemove:
  case eVarSetOperationAppend:
  case eVarSetOperationInvalid:
    error = OptionValue::SetValueFromString(value, op);
    break;
  }
  return error;
}

  MetaSema::ActionResult
  MetaSema::actOnShellCommand(llvm::StringRef commandLine,
                              Value* result) const {
    llvm::StringRef trimmed(commandLine.trim(" \t\n\v\f\r "));
    if (!trimmed.empty()) {
      int ret = std::system(trimmed.str().c_str());

      // Build the result
      clang::ASTContext& Ctx = m_Interpreter.getCI()->getASTContext();
      if (result) {
        *result = Value(Ctx.IntTy, m_Interpreter);
        result->getAs<long long>() = ret;
      }

      return (ret == 0) ? AR_Success : AR_Failure;
    }
    if (result)
      *result = Value();
    // nothing to run - should this be success or failure?
    return AR_Failure;
  }

  MetaSema::ActionResult
  MetaSema::actOnShellCommand(llvm::StringRef commandLine,
                              StoredValueRef* result) const {
    llvm::StringRef trimmed(commandLine.trim(" \t\n\v\f\r "));
    if (!trimmed.empty()) {
      int ret = std::system(trimmed.str().c_str());

      // Build the result
      clang::ASTContext& Ctx = m_Interpreter.getCI()->getASTContext();
      llvm::GenericValue retGV;
      retGV.IntVal = llvm::APInt(sizeof(int) * 8, ret, true /*isSigned*/);
      Value V(retGV, Ctx.IntTy);
      if (result)
        *result = StoredValueRef::bitwiseCopy(Ctx, V);

      return (ret == 0) ? AR_Success : AR_Failure;
    }
    if (result)
      *result = StoredValueRef();
    // nothing to run - should this be success or failure?
    return AR_Failure;
  }

Status OptionValueString::SetValueFromString(llvm::StringRef value,
                                             VarSetOperationType op) {
  Status error;

  std::string value_str = value.str();
  value = value.trim();
  if (value.size() > 0) {
    switch (value.front()) {
    case '"':
    case '\'': {
      if (value.size() <= 1 || value.back() != value.front()) {
        error.SetErrorString("mismatched quotes");
        return error;
      }
      value = value.drop_front().drop_back();
    } break;
    }
    value_str = value.str();
  }

  switch (op) {
  case eVarSetOperationInvalid:
  case eVarSetOperationInsertBefore:
  case eVarSetOperationInsertAfter:
  case eVarSetOperationRemove:
    if (m_validator) {
      error = m_validator(value_str.c_str(), m_validator_baton);
      if (error.Fail())
        return error;
    }
    error = OptionValue::SetValueFromString(value, op);
    break;

  case eVarSetOperationAppend: {
    std::string new_value(m_current_value);
    if (value.size() > 0) {
      if (m_options.Test(eOptionEncodeCharacterEscapeSequences)) {
        std::string str;
        Args::EncodeEscapeSequences(value_str.c_str(), str);
        new_value.append(str);
      } else
        new_value.append(value);
    }
    if (m_validator) {
      error = m_validator(new_value.c_str(), m_validator_baton);
      if (error.Fail())
        return error;
    }
    m_current_value.assign(new_value);
    NotifyValueChanged();
  } break;

  case eVarSetOperationClear:
    Clear();
    NotifyValueChanged();
    break;

  case eVarSetOperationReplace:
  case eVarSetOperationAssign:
    if (m_validator) {
      error = m_validator(value_str.c_str(), m_validator_baton);
      if (error.Fail())
        return error;
    }
    m_value_was_set = true;
    if (m_options.Test(eOptionEncodeCharacterEscapeSequences)) {
      Args::EncodeEscapeSequences(value_str.c_str(), m_current_value);
    } else {
      SetCurrentValue(value_str);
    }
    NotifyValueChanged();
    break;
  }
  return error;
}