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LibGLSL: Add initial GLSL parser implementation

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Poseydon42 2023-07-23 22:59:26 +01:00 • committed by Jelle Raaijmakers
parent 0b6424d883
commit 29972876e4
11 changed files with 4093 additions and 0 deletions
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153
Userland/Libraries/LibGLSL/Parser.h Normal file
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/*
* Copyright (c) 2021, Itamar S. <itamar8910@gmail.com>
* Copyright (c) 2023, Volodymyr V. <vvmposeydon@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Noncopyable.h>
#include <AK/NonnullRefPtr.h>
#include <LibCodeComprehension/Types.h>
#include <LibGLSL/AST.h>
#include <LibGLSL/Lexer.h>
#include <LibGLSL/Preprocessor.h>
namespace GLSL {
class Parser final {
AK_MAKE_NONCOPYABLE(Parser);
public:
explicit Parser(Vector<Token> tokens, String const& filename);
~Parser() = default;
ErrorOr<NonnullRefPtr<TranslationUnit>> parse();
bool eof() const;
RefPtr<TranslationUnit const> root_node() const { return m_root_node; }
void print_tokens() const;
Vector<Token> const& tokens() const { return m_tokens; }
Vector<String> const& errors() const { return m_errors; }
private:
enum class DeclarationType {
Function,
Variable,
Struct,
};
ErrorOr<Optional<DeclarationType>> match_declaration_in_translation_unit();
ErrorOr<bool> match_struct_declaration();
ErrorOr<bool> match_function_declaration();
ErrorOr<bool> match_variable_declaration();
ErrorOr<bool> match_block_statement();
ErrorOr<bool> match_expression();
ErrorOr<bool> match_name();
ErrorOr<bool> match_string_literal();
ErrorOr<bool> match_numeric_literal();
ErrorOr<bool> match_boolean_literal();
ErrorOr<bool> match_type();
ErrorOr<Vector<NonnullRefPtr<Declaration const>>> parse_declarations_in_translation_unit(ASTNode const& parent);
ErrorOr<RefPtr<Declaration const>> parse_single_declaration_in_translation_unit(ASTNode const& parent);
ErrorOr<NonnullRefPtr<Declaration const>> parse_declaration(ASTNode const& parent, DeclarationType);
ErrorOr<NonnullRefPtr<StructDeclaration const>> parse_struct_declaration(ASTNode const& parent);
ErrorOr<Vector<NonnullRefPtr<Declaration const>>> parse_struct_members(StructDeclaration& parent);
ErrorOr<NonnullRefPtr<FunctionDeclaration const>> parse_function_declaration(ASTNode const& parent);
ErrorOr<Vector<NonnullRefPtr<Parameter const>>> parse_parameter_list(ASTNode const& parent);
ErrorOr<NonnullRefPtr<FunctionDefinition const>> parse_function_definition(ASTNode const& parent);
ErrorOr<NonnullRefPtr<VariableDeclaration const>> parse_variable_declaration(ASTNode const& parent, bool expect_semicolon = true);
ErrorOr<NonnullRefPtr<Statement const>> parse_statement(ASTNode const& parent);
ErrorOr<NonnullRefPtr<BlockStatement const>> parse_block_statement(ASTNode const& parent);
ErrorOr<NonnullRefPtr<IfStatement const>> parse_if_statement(ASTNode const& parent);
ErrorOr<NonnullRefPtr<ForStatement const>> parse_for_statement(ASTNode const& parent);
ErrorOr<NonnullRefPtr<ReturnStatement const>> parse_return_statement(ASTNode const& parent);
enum class Associativity {
LeftToRight,
RightToLeft
};
static HashMap<BinaryOp, Associativity> s_operator_associativity;
ErrorOr<NonnullRefPtr<Expression const>> parse_expression(ASTNode const& parent, int min_precedence = 0, Associativity associativity = Associativity::LeftToRight);
ErrorOr<NonnullRefPtr<Expression const>> parse_unary_expression(ASTNode const& parent);
ErrorOr<Vector<NonnullRefPtr<Expression const>>> parse_function_call_args(ASTNode const& parent);
ErrorOr<NonnullRefPtr<Expression const>> parse_boolean_literal(ASTNode const& parent);
ErrorOr<NonnullRefPtr<Expression const>> parse_numeric_literal(ASTNode const& parent);
ErrorOr<NonnullRefPtr<Expression const>> parse_string_literal(ASTNode const& parent);
ErrorOr<NonnullRefPtr<Name const>> parse_name(ASTNode const& parent, bool allow_sized_name = false);
ErrorOr<NonnullRefPtr<Type const>> parse_type(ASTNode const& parent);
bool match_unary_op();
ErrorOr<UnaryOp> consume_unary_op();
bool match_binary_op();
ErrorOr<BinaryOp> peek_binary_op();
bool match_storage_qualifier();
ErrorOr<StorageTypeQualifier> consume_storage_qualifier();
Token peek(size_t offset = 0) const;
Optional<Token> peek(Token::Type) const;
bool match(Token::Type);
bool match_keyword(StringView);
bool match_preprocessor();
ErrorOr<Token> consume();
ErrorOr<Token> consume(Token::Type);
ErrorOr<Token> consume_keyword(StringView);
ErrorOr<void> consume_preprocessor();
Position position() const;
Position previous_token_end() const;
Optional<size_t> index_of_token_at(Position pos) const;
Vector<Token> tokens_in_range(Position start, Position end) const;
ErrorOr<String> text_in_range(Position start, Position end) const;
ErrorOr<void> error(StringView message = {});
template<class T, class... Args>
NonnullRefPtr<T>
create_ast_node(ASTNode const& parent, Position const& start, Optional<Position> end, Args&&... args)
{
auto node = adopt_ref(*new T(&parent, start, end, m_filename, forward<Args>(args)...));
return node;
}
NonnullRefPtr<TranslationUnit>
create_root_ast_node(Position const& start, Position end)
{
auto node = adopt_ref(*new TranslationUnit(nullptr, start, end, m_filename));
m_root_node = node;
return node;
}
DummyAstNode& get_dummy_node()
{
static NonnullRefPtr<DummyAstNode> dummy = adopt_ref(*new DummyAstNode(nullptr, {}, {}, {}));
return dummy;
}
struct State {
size_t token_index { 0 };
};
void save_state();
void load_state();
State m_state;
Vector<State> m_saved_states;
String m_filename;
Vector<Token> m_tokens;
RefPtr<TranslationUnit> m_root_node;
Vector<String> m_errors;
};
}