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LibJS: Add function default arguments

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Adds the ability for function arguments to have default values. This
works for standard functions as well as arrow functions. Default values
are not printed in a <function>.toString() call, as nodes cannot print
their source string representation.
This commit is contained in:
Matthew Olsson 2020-05-02 11:46:39 -07:00 • committed by Andreas Kling
parent 751f813f6a
commit 5e66f1900b
8 changed files with 184 additions and 35 deletions
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22
Libraries/LibJS/AST.cpp
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@ -670,17 +670,27 @@ void NullLiteral::dump(int indent) const
void FunctionNode::dump(int indent, const char* class_name) const
{
StringBuilder parameters_builder;
parameters_builder.join(',', parameters());
print_indent(indent);
printf("%s '%s(%s)'\n", class_name, name().characters(), parameters_builder.build().characters());
printf("%s '%s'\n", class_name, name().characters());
if (!m_parameters.is_empty()) {
print_indent(indent + 1);
printf("(Parameters)\n");
for (auto& parameter : m_parameters) {
print_indent(indent + 2);
printf("%s\n", parameter.name.characters());
if (parameter.default_value) {
parameter.default_value->dump(indent + 3);
}
}
}
if (!m_variables.is_empty()) {
print_indent(indent + 1);
printf("(Variables)\n");
for (auto& variable : m_variables)
variable.dump(indent + 2);
}
for (auto& variable : m_variables)
variable.dump(indent + 2);
print_indent(indent + 1);
printf("(Body)\n");
body().dump(indent + 2);