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ladybird/Userland/Shell/ImmediateFunctions.cpp
Andreas Kling 8a48246ed1 Everywhere: Stop using NonnullRefPtrVector 
This class had slightly confusing semantics and the added weirdness
doesn't seem worth it just so we can say "." instead of "->" when
iterating over a vector of NNRPs.

This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 23:46:35 +01:00

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/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "Formatter.h"
#include "Shell.h"
#include <LibRegex/Regex.h>
namespace Shell {
ErrorOr<RefPtr<AST::Node>> Shell::immediate_length_impl(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments, bool across)
{
auto name = across ? "length_across" : "length";
if (arguments.size() < 1 || arguments.size() > 2) {
raise_error(ShellError::EvaluatedSyntaxError, DeprecatedString::formatted("Expected one or two arguments to `{}'", name), invoking_node.position());
return nullptr;
}
enum {
Infer,
String,
List,
} mode { Infer };
bool is_inferred = false;
const AST::Node* expr_node;
if (arguments.size() == 2) {
// length string <expr>
// length list <expr>
auto& mode_arg = arguments.first();
if (!mode_arg->is_bareword()) {
raise_error(ShellError::EvaluatedSyntaxError, DeprecatedString::formatted("Expected a bareword (either 'string' or 'list') in the two-argument form of the `{}' immediate", name), mode_arg->position());
return nullptr;
}
auto const& mode_name = static_cast<const AST::BarewordLiteral&>(*mode_arg).text();
if (mode_name == "list") {
mode = List;
} else if (mode_name == "string") {
mode = String;
} else if (mode_name == "infer") {
mode = Infer;
} else {
raise_error(ShellError::EvaluatedSyntaxError, DeprecatedString::formatted("Expected either 'string' or 'list' (and not {}) in the two-argument form of the `{}' immediate", mode_name, name), mode_arg->position());
return nullptr;
}
expr_node = arguments[1];
} else {
expr_node = arguments[0];
}
if (mode == Infer) {
is_inferred = true;
if (expr_node->is_list())
mode = List;
else if (expr_node->is_simple_variable()) // "Look inside" variables
mode = TRY(TRY(const_cast<AST::Node*>(expr_node)->run(this))->resolve_without_cast(this))->is_list_without_resolution() ? List : String;
else if (is<AST::ImmediateExpression>(expr_node))
mode = List;
else
mode = String;
}
auto value_with_number = [&](auto number) -> ErrorOr<NonnullRefPtr<AST::Node>> {
return AST::make_ref_counted<AST::BarewordLiteral>(invoking_node.position(), TRY(String::number(number)));
};
auto do_across = [&](StringView mode_name, auto& values) -> ErrorOr<RefPtr<AST::Node>> {
if (is_inferred)
mode_name = "infer"sv;
// Translate to a list of applications of `length <mode_name>`
Vector<NonnullRefPtr<AST::Node>> resulting_nodes;
resulting_nodes.ensure_capacity(values.size());
for (auto& entry : values) {
// ImmediateExpression(length <mode_name> <entry>)
resulting_nodes.unchecked_append(AST::make_ref_counted<AST::ImmediateExpression>(
expr_node->position(),
AST::NameWithPosition { TRY("length"_string), invoking_node.function_position() },
Vector<NonnullRefPtr<AST::Node>> { Vector<NonnullRefPtr<AST::Node>> {
static_cast<NonnullRefPtr<AST::Node>>(AST::make_ref_counted<AST::BarewordLiteral>(expr_node->position(), TRY(String::from_utf8(mode_name)))),
AST::make_ref_counted<AST::SyntheticNode>(expr_node->position(), NonnullRefPtr<AST::Value>(entry)),
} },
expr_node->position()));
}
return AST::make_ref_counted<AST::ListConcatenate>(invoking_node.position(), move(resulting_nodes));
};
switch (mode) {
default:
case Infer:
VERIFY_NOT_REACHED();
case List: {
auto value = TRY(const_cast<AST::Node*>(expr_node)->run(this));
if (!value)
return value_with_number(0);
value = TRY(value->resolve_without_cast(this));
if (auto list = dynamic_cast<AST::ListValue*>(value.ptr())) {
if (across)
return do_across("list"sv, list->values());
return value_with_number(list->values().size());
}
auto list = TRY(value->resolve_as_list(this));
if (!across)
return value_with_number(list.size());
dbgln("List has {} entries", list.size());
auto values = AST::make_ref_counted<AST::ListValue>(move(list));
return do_across("list"sv, values->values());
}
case String: {
// 'across' will only accept lists, and '!across' will only accept non-lists here.
if (expr_node->is_list()) {
if (!across) {
raise_no_list_allowed:;
Formatter formatter { *expr_node };
if (is_inferred) {
raise_error(ShellError::EvaluatedSyntaxError,
DeprecatedString::formatted("Could not infer expression type, please explicitly use `{0} string' or `{0} list'", name),
invoking_node.position());
return nullptr;
}
auto source = formatter.format();
raise_error(ShellError::EvaluatedSyntaxError,
source.is_empty()
? "Invalid application of `length' to a list"
: DeprecatedString::formatted("Invalid application of `length' to a list\nperhaps you meant `{1}length \"{0}\"{2}' or `{1}length_across {0}{2}'?", source, "\x1b[32m", "\x1b[0m"),
expr_node->position());
return nullptr;
}
}
auto value = TRY(const_cast<AST::Node*>(expr_node)->run(this));
if (!value)
return value_with_number(0);
value = TRY(value->resolve_without_cast(*this));
if (auto list = dynamic_cast<AST::ListValue*>(value.ptr())) {
if (!across)
goto raise_no_list_allowed;
return do_across("string"sv, list->values());
}
if (across && !value->is_list()) {
Formatter formatter { *expr_node };
auto source = formatter.format();
raise_error(ShellError::EvaluatedSyntaxError,
DeprecatedString::formatted("Invalid application of `length_across' to a non-list\nperhaps you meant `{1}length {0}{2}'?", source, "\x1b[32m", "\x1b[0m"),
expr_node->position());
return nullptr;
}
// Evaluate the nodes and substitute with the lengths.
auto list = TRY(value->resolve_as_list(this));
if (!expr_node->is_list()) {
if (list.size() == 1) {
if (across)
goto raise_no_list_allowed;
// This is the normal case, the expression is a normal non-list expression.
return value_with_number(list.first().bytes_as_string_view().length());
}
// This can be hit by asking for the length of a command list (e.g. `(>/dev/null)`)
// raise an error about misuse of command lists for now.
// FIXME: What's the length of `(>/dev/null)` supposed to be?
raise_error(ShellError::EvaluatedSyntaxError, "Length of meta value (or command list) requested, this is currently not supported.", expr_node->position());
return nullptr;
}
auto values = AST::make_ref_counted<AST::ListValue>(move(list));
return do_across("string"sv, values->values());
}
}
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_length(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
return immediate_length_impl(invoking_node, arguments, false);
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_length_across(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
return immediate_length_impl(invoking_node, arguments, true);
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_regex_replace(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
if (arguments.size() != 3) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 3 arguments to regex_replace", invoking_node.position());
return nullptr;
}
auto pattern = TRY(const_cast<AST::Node&>(*arguments[0]).run(this));
auto replacement = TRY(const_cast<AST::Node&>(*arguments[1]).run(this));
auto value = TRY(TRY(const_cast<AST::Node&>(*arguments[2]).run(this))->resolve_without_cast(this));
if (!pattern->is_string()) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected the regex_replace pattern to be a string", arguments[0]->position());
return nullptr;
}
if (!replacement->is_string()) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected the regex_replace replacement string to be a string", arguments[1]->position());
return nullptr;
}
if (!value->is_string()) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected the regex_replace target value to be a string", arguments[2]->position());
return nullptr;
}
Regex<PosixExtendedParser> re { TRY(pattern->resolve_as_list(this)).first().to_deprecated_string() };
auto result = re.replace(
TRY(value->resolve_as_list(this))[0],
TRY(replacement->resolve_as_list(this))[0],
PosixFlags::Global | PosixFlags::Multiline | PosixFlags::Unicode);
return AST::make_ref_counted<AST::StringLiteral>(invoking_node.position(), TRY(String::from_utf8(result)), AST::StringLiteral::EnclosureType::None);
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_remove_suffix(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
if (arguments.size() != 2) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to remove_suffix", invoking_node.position());
return nullptr;
}
auto suffix = TRY(const_cast<AST::Node&>(*arguments[0]).run(this));
auto value = TRY(TRY(const_cast<AST::Node&>(*arguments[1]).run(this))->resolve_without_cast(this));
if (!suffix->is_string()) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected the remove_suffix suffix string to be a string", arguments[0]->position());
return nullptr;
}
auto suffix_str = TRY(suffix->resolve_as_list(this))[0];
auto values = TRY(value->resolve_as_list(this));
Vector<NonnullRefPtr<AST::Node>> nodes;
for (auto& value_str : values) {
String removed = TRY(String::from_utf8(value_str));
if (value_str.bytes_as_string_view().ends_with(suffix_str))
removed = TRY(removed.substring_from_byte_offset(0, value_str.bytes_as_string_view().length() - suffix_str.bytes_as_string_view().length()));
nodes.append(AST::make_ref_counted<AST::StringLiteral>(invoking_node.position(), move(removed), AST::StringLiteral::EnclosureType::None));
}
return AST::make_ref_counted<AST::ListConcatenate>(invoking_node.position(), move(nodes));
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_remove_prefix(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
if (arguments.size() != 2) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to remove_prefix", invoking_node.position());
return nullptr;
}
auto prefix = TRY(const_cast<AST::Node&>(*arguments[0]).run(this));
auto value = TRY(TRY(const_cast<AST::Node&>(*arguments[1]).run(this))->resolve_without_cast(this));
if (!prefix->is_string()) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected the remove_prefix prefix string to be a string", arguments[0]->position());
return nullptr;
}
auto prefix_str = TRY(prefix->resolve_as_list(this))[0];
auto values = TRY(value->resolve_as_list(this));
Vector<NonnullRefPtr<AST::Node>> nodes;
for (auto& value_str : values) {
String removed = TRY(String::from_utf8(value_str));
if (value_str.bytes_as_string_view().starts_with(prefix_str))
removed = TRY(removed.substring_from_byte_offset(prefix_str.bytes_as_string_view().length()));
nodes.append(AST::make_ref_counted<AST::StringLiteral>(invoking_node.position(), move(removed), AST::StringLiteral::EnclosureType::None));
}
return AST::make_ref_counted<AST::ListConcatenate>(invoking_node.position(), move(nodes));
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_split(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
if (arguments.size() != 2) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to split", invoking_node.position());
return nullptr;
}
auto delimiter = TRY(const_cast<AST::Node&>(*arguments[0]).run(this));
auto value = TRY(TRY(const_cast<AST::Node&>(*arguments[1]).run(this))->resolve_without_cast(this));
if (!delimiter->is_string()) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected the split delimiter string to be a string", arguments[0]->position());
return nullptr;
}
auto delimiter_str = TRY(delimiter->resolve_as_list(this))[0];
auto transform = [&](auto const& values) {
// Translate to a list of applications of `split <delimiter>`
Vector<NonnullRefPtr<AST::Node>> resulting_nodes;
resulting_nodes.ensure_capacity(values.size());
for (auto& entry : values) {
// ImmediateExpression(split <delimiter> <entry>)
resulting_nodes.unchecked_append(AST::make_ref_counted<AST::ImmediateExpression>(
arguments[1]->position(),
invoking_node.function(),
Vector<NonnullRefPtr<AST::Node>> { Vector<NonnullRefPtr<AST::Node>> {
arguments[0],
AST::make_ref_counted<AST::SyntheticNode>(arguments[1]->position(), NonnullRefPtr<AST::Value>(entry)),
} },
arguments[1]->position()));
}
return AST::make_ref_counted<AST::ListConcatenate>(invoking_node.position(), move(resulting_nodes));
};
if (auto list = dynamic_cast<AST::ListValue*>(value.ptr())) {
return transform(list->values());
}
// Otherwise, just resolve to a list and transform that.
auto list = TRY(value->resolve_as_list(this));
if (!value->is_list()) {
if (list.is_empty())
return AST::make_ref_counted<AST::ListConcatenate>(invoking_node.position(), Vector<NonnullRefPtr<AST::Node>> {});
auto& value = list.first();
Vector<String> split_strings;
if (delimiter_str.is_empty()) {
StringBuilder builder;
for (auto code_point : Utf8View { value }) {
builder.append_code_point(code_point);
split_strings.append(TRY(builder.to_string()));
builder.clear();
}
} else {
auto split = StringView { value }.split_view(delimiter_str, options.inline_exec_keep_empty_segments ? SplitBehavior::KeepEmpty : SplitBehavior::Nothing);
split_strings.ensure_capacity(split.size());
for (auto& entry : split)
split_strings.append(TRY(String::from_utf8(entry)));
}
return AST::make_ref_counted<AST::SyntheticNode>(invoking_node.position(), AST::make_ref_counted<AST::ListValue>(move(split_strings)));
}
return transform(AST::make_ref_counted<AST::ListValue>(list)->values());
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_concat_lists(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
Vector<NonnullRefPtr<AST::Node>> result;
for (auto& argument : arguments) {
if (auto* list = dynamic_cast<AST::ListConcatenate const*>(argument.ptr())) {
result.extend(list->list());
} else {
auto list_of_values = TRY(TRY(const_cast<AST::Node&>(*argument).run(this))->resolve_without_cast(this));
if (auto* list = dynamic_cast<AST::ListValue*>(list_of_values.ptr())) {
for (auto& entry : static_cast<Vector<NonnullRefPtr<AST::Value>>&>(list->values()))
result.append(AST::make_ref_counted<AST::SyntheticNode>(argument->position(), entry));
} else {
auto values = TRY(list_of_values->resolve_as_list(this));
for (auto& entry : values)
result.append(AST::make_ref_counted<AST::StringLiteral>(argument->position(), entry, AST::StringLiteral::EnclosureType::None));
}
}
}
return AST::make_ref_counted<AST::ListConcatenate>(invoking_node.position(), move(result));
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_filter_glob(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
// filter_glob string list
if (arguments.size() != 2) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly two arguments to filter_glob (<glob> <list>)", invoking_node.position());
return nullptr;
}
auto glob_list = TRY(TRY(const_cast<AST::Node&>(*arguments[0]).run(*this))->resolve_as_list(*this));
if (glob_list.size() != 1) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected the <glob> argument to filter_glob to be a single string", arguments[0]->position());
return nullptr;
}
auto& glob = glob_list.first();
auto& list_node = arguments[1];
Vector<NonnullRefPtr<AST::Node>> result;
TRY(const_cast<AST::Node&>(*list_node).for_each_entry(*this, [&](NonnullRefPtr<AST::Value> entry) -> ErrorOr<IterationDecision> {
auto value = TRY(entry->resolve_as_list(*this));
if (value.size() == 0)
return IterationDecision::Continue;
if (value.size() == 1) {
if (!value.first().bytes_as_string_view().matches(glob))
return IterationDecision::Continue;
result.append(AST::make_ref_counted<AST::StringLiteral>(arguments[1]->position(), value.first(), AST::StringLiteral::EnclosureType::None));
return IterationDecision::Continue;
}
for (auto& entry : value) {
if (entry.bytes_as_string_view().matches(glob)) {
Vector<NonnullRefPtr<AST::Node>> nodes;
for (auto& string : value)
nodes.append(AST::make_ref_counted<AST::StringLiteral>(arguments[1]->position(), string, AST::StringLiteral::EnclosureType::None));
result.append(AST::make_ref_counted<AST::ListConcatenate>(arguments[1]->position(), move(nodes)));
return IterationDecision::Continue;
}
}
return IterationDecision::Continue;
}));
return AST::make_ref_counted<AST::ListConcatenate>(invoking_node.position(), move(result));
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_join(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
if (arguments.size() != 2) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to join", invoking_node.position());
return nullptr;
}
auto delimiter = TRY(const_cast<AST::Node&>(*arguments[0]).run(this));
if (!delimiter->is_string()) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected the join delimiter string to be a string", arguments[0]->position());
return nullptr;
}
auto value = TRY(TRY(const_cast<AST::Node&>(*arguments[1]).run(this))->resolve_without_cast(this));
if (!value->is_list()) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected the joined list to be a list", arguments[1]->position());
return nullptr;
}
auto delimiter_str = TRY(delimiter->resolve_as_list(this))[0];
StringBuilder builder;
builder.join(delimiter_str, TRY(value->resolve_as_list(*this)));
return AST::make_ref_counted<AST::StringLiteral>(invoking_node.position(), TRY(builder.to_string()), AST::StringLiteral::EnclosureType::None);
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_value_or_default(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
if (arguments.size() != 2) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to value_or_default", invoking_node.position());
return nullptr;
}
auto name = TRY(TRY(const_cast<AST::Node&>(*arguments.first()).run(*this))->resolve_as_string(*this));
if (!TRY(local_variable_or(name, ""sv)).is_empty())
return make_ref_counted<AST::SimpleVariable>(invoking_node.position(), name);
return arguments.last();
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_assign_default(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
if (arguments.size() != 2) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to assign_default", invoking_node.position());
return nullptr;
}
auto name = TRY(TRY(const_cast<AST::Node&>(*arguments.first()).run(*this))->resolve_as_string(*this));
if (!TRY(local_variable_or(name, ""sv)).is_empty())
return make_ref_counted<AST::SimpleVariable>(invoking_node.position(), name);
auto value = TRY(TRY(const_cast<AST::Node&>(*arguments.last()).run(*this))->resolve_without_cast(*this));
set_local_variable(name.to_deprecated_string(), value);
return make_ref_counted<AST::SyntheticNode>(invoking_node.position(), value);
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_error_if_empty(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
if (arguments.size() != 2) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to error_if_empty", invoking_node.position());
return nullptr;
}
auto name = TRY(TRY(const_cast<AST::Node&>(*arguments.first()).run(*this))->resolve_as_string(*this));
if (!TRY(local_variable_or(name, ""sv)).is_empty())
return make_ref_counted<AST::SimpleVariable>(invoking_node.position(), name);
auto error_value = TRY(TRY(const_cast<AST::Node&>(*arguments.last()).run(*this))->resolve_as_string(*this));
if (error_value.is_empty())
error_value = TRY(String::formatted("Expected {} to be non-empty", name));
raise_error(ShellError::EvaluatedSyntaxError, error_value.bytes_as_string_view(), invoking_node.position());
return nullptr;
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_null_or_alternative(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
if (arguments.size() != 2) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to null_or_alternative", invoking_node.position());
return nullptr;
}
auto value = TRY(TRY(const_cast<AST::Node&>(*arguments.first()).run(*this))->resolve_without_cast(*this));
if ((value->is_string() && TRY(value->resolve_as_string(*this)).is_empty()) || (value->is_list() && TRY(value->resolve_as_list(*this)).is_empty()))
return make_ref_counted<AST::SyntheticNode>(invoking_node.position(), value);
return arguments.last();
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_defined_value_or_default(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
if (arguments.size() != 2) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to defined_value_or_default", invoking_node.position());
return nullptr;
}
auto name = TRY(TRY(const_cast<AST::Node&>(*arguments.first()).run(*this))->resolve_as_string(*this));
if (!find_frame_containing_local_variable(name))
return arguments.last();
return make_ref_counted<AST::SimpleVariable>(invoking_node.position(), name);
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_assign_defined_default(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
if (arguments.size() != 2) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to assign_defined_default", invoking_node.position());
return nullptr;
}
auto name = TRY(TRY(const_cast<AST::Node&>(*arguments.first()).run(*this))->resolve_as_string(*this));
if (find_frame_containing_local_variable(name))
return make_ref_counted<AST::SimpleVariable>(invoking_node.position(), name);
auto value = TRY(TRY(const_cast<AST::Node&>(*arguments.last()).run(*this))->resolve_without_cast(*this));
set_local_variable(name.to_deprecated_string(), value);
return make_ref_counted<AST::SyntheticNode>(invoking_node.position(), value);
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_error_if_unset(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
if (arguments.size() != 2) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to error_if_unset", invoking_node.position());
return nullptr;
}
auto name = TRY(TRY(const_cast<AST::Node&>(*arguments.first()).run(*this))->resolve_as_string(*this));
if (find_frame_containing_local_variable(name))
return make_ref_counted<AST::SimpleVariable>(invoking_node.position(), name);
auto error_value = TRY(TRY(const_cast<AST::Node&>(*arguments.last()).run(*this))->resolve_as_string(*this));
if (error_value.is_empty())
error_value = TRY(String::formatted("Expected {} to be set", name));
raise_error(ShellError::EvaluatedSyntaxError, error_value.bytes_as_string_view(), invoking_node.position());
return nullptr;
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_null_if_unset_or_alternative(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
if (arguments.size() != 2) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to null_if_unset_or_alternative", invoking_node.position());
return nullptr;
}
auto name = TRY(TRY(const_cast<AST::Node&>(*arguments.first()).run(*this))->resolve_as_string(*this));
if (!find_frame_containing_local_variable(name))
return arguments.last();
return make_ref_counted<AST::SimpleVariable>(invoking_node.position(), name);
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_reexpand(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
if (arguments.size() != 1) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 1 argument to reexpand", invoking_node.position());
return nullptr;
}
auto value = TRY(TRY(const_cast<AST::Node&>(*arguments.first()).run(*this))->resolve_as_string(*this));
return parse(value, m_is_interactive, false);
}
ErrorOr<RefPtr<AST::Node>> Shell::immediate_length_of_variable(AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
if (arguments.size() != 1) {
raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 1 argument to length_of_variable", invoking_node.position());
return nullptr;
}
auto name = TRY(TRY(const_cast<AST::Node&>(*arguments.first()).run(*this))->resolve_as_string(*this));
auto variable = make_ref_counted<AST::SimpleVariable>(invoking_node.position(), name);
return immediate_length_impl(
invoking_node,
{ move(variable) },
false);
}
ErrorOr<RefPtr<AST::Node>> Shell::run_immediate_function(StringView str, AST::ImmediateExpression& invoking_node, Vector<NonnullRefPtr<AST::Node>> const& arguments)
{
#define __ENUMERATE_SHELL_IMMEDIATE_FUNCTION(name) \
if (str == #name) \
return immediate_##name(invoking_node, arguments);
ENUMERATE_SHELL_IMMEDIATE_FUNCTIONS()
#undef __ENUMERATE_SHELL_IMMEDIATE_FUNCTION
raise_error(ShellError::EvaluatedSyntaxError, DeprecatedString::formatted("Unknown immediate function {}", str), invoking_node.position());
return nullptr;
}
bool Shell::has_immediate_function(StringView str)
{
#define __ENUMERATE_SHELL_IMMEDIATE_FUNCTION(name) \
if (str == #name) \
return true;
ENUMERATE_SHELL_IMMEDIATE_FUNCTIONS()
#undef __ENUMERATE_SHELL_IMMEDIATE_FUNCTION
return false;
}
}
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