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LibWeb: Parse IDL interface constructors

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WrapperGenerator will now parse and store IDL interface constructors,
including parameters and overloads.
See https://heycam.github.io/webidl/#idl-constructors.
This commit is contained in:
Linus Groh 2021-02-17 22:25:51 +01:00 • committed by Andreas Kling
parent ff324fe989
commit e3577f871b
1 changed files with 51 additions and 18 deletions
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69
Userland/Libraries/LibWeb/CodeGenerators/WrapperGenerator.cpp
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Linus Groh <mail@linusgroh.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -106,6 +107,17 @@ static void report_parsing_error(StringView message, StringView filename, String
namespace IDL {
template<typename FunctionType>
static size_t get_function_length(FunctionType& function)
{
size_t length = 0;
for (auto& parameter : function.parameters) {
if (!parameter.optional)
length++;
}
return length;
}
struct Type {
String name;
bool nullable { false };
@ -123,15 +135,14 @@ struct Function {
Vector<Parameter> parameters;
HashMap<String, String> extended_attributes;
size_t length() const
{
size_t length = 0;
for (auto& parameter : parameters) {
if (!parameter.optional)
length++;
}
return length;
}
size_t length() const { return get_function_length(*this); }
};
struct Constructor {
String name;
Vector<Parameter> parameters;
size_t length() const { return get_function_length(*this); }
};
struct Constant {
@ -157,6 +168,7 @@ struct Interface {
Vector<Attribute> attributes;
Vector<Constant> constants;
Vector<Constructor> constructors;
Vector<Function> functions;
// Added for convenience after parsing
@ -262,17 +274,11 @@ static OwnPtr<Interface> parse_interface(StringView filename, const StringView&
interface->constants.append(move(constant));
};
auto parse_function = [&](HashMap<String, String>& extended_attributes) {
auto return_type = parse_type();
auto parse_parameters = [&] {
consume_whitespace();
auto name = lexer.consume_until([](auto ch) { return isspace(ch) || ch == '('; });
consume_whitespace();
assert_specific('(');
Vector<Parameter> parameters;
for (;;) {
if (lexer.consume_specific(')'))
if (lexer.next_is(')'))
break;
bool optional = lexer.consume_specific("optional");
if (optional)
@ -281,18 +287,40 @@ static OwnPtr<Interface> parse_interface(StringView filename, const StringView&
consume_whitespace();
auto name = lexer.consume_until([](auto ch) { return isspace(ch) || ch == ',' || ch == ')'; });
parameters.append({ move(type), move(name), optional });
if (lexer.consume_specific(')'))
if (lexer.next_is(')'))
break;
assert_specific(',');
consume_whitespace();
}
return parameters;
};
auto parse_function = [&](HashMap<String, String>& extended_attributes) {
auto return_type = parse_type();
consume_whitespace();
auto name = lexer.consume_until([](auto ch) { return isspace(ch) || ch == '('; });
consume_whitespace();
assert_specific('(');
auto parameters = parse_parameters();
assert_specific(')');
consume_whitespace();
assert_specific(';');
interface->functions.append(Function { return_type, name, move(parameters), move(extended_attributes) });
};
auto parse_constructor = [&] {
assert_string("constructor");
consume_whitespace();
assert_specific('(');
auto parameters = parse_parameters();
assert_specific(')');
consume_whitespace();
assert_specific(';');
interface->constructors.append(Constructor { interface->name, move(parameters) });
};
auto parse_extended_attributes = [&] {
HashMap<String, String> extended_attributes;
for (;;) {
@ -327,6 +355,11 @@ static OwnPtr<Interface> parse_interface(StringView filename, const StringView&
extended_attributes = parse_extended_attributes();
}
if (lexer.next_is("constructor")) {
parse_constructor();
continue;
}
if (lexer.next_is("const")) {
parse_constant();
continue;