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JSSpecCompiler: Add TextParser for converting algorithm steps into AST

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Dan Klishch 2023-08-17 22:30:01 -04:00 • committed by Andrew Kaster
parent 9f29e04897
commit f70e39d501
2 changed files with 571 additions and 0 deletions
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67
Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/Parser/TextParser.h Normal file
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/*
* Copyright (c) 2023, Dan Klishch <danilklishch@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include "AST/AST.h"
#include "Parser/ParseError.h"
#include "Parser/Token.h"
namespace JSSpecCompiler {
class TextParser {
public:
struct DefinitionParseResult {
StringView section_number;
StringView function_name;
Vector<StringView> arguments;
};
TextParser(Vector<Token>& tokens_, XML::Node const* node_)
: m_tokens(tokens_)
, m_node(node_)
{
}
ParseErrorOr<DefinitionParseResult> parse_definition();
ParseErrorOr<Tree> parse_step_without_substeps();
ParseErrorOr<Tree> parse_step_with_substeps(Tree substeps);
private:
struct IfConditionParseResult {
bool is_if_branch;
Optional<Tree> condition;
};
void retreat();
[[nodiscard]] auto rollback_point();
ParseErrorOr<Token const*> peek_token();
ParseErrorOr<Token const*> consume_token();
ParseErrorOr<Token const*> consume_token_with_one_of_types(std::initializer_list<TokenType> types);
ParseErrorOr<Token const*> consume_token_with_type(TokenType type);
ParseErrorOr<void> consume_word(StringView word);
ParseErrorOr<void> consume_words(std::initializer_list<StringView> words);
bool is_eof() const;
ParseErrorOr<void> expect_eof() const;
ParseErrorOr<Tree> parse_record_direct_list_initialization();
ParseErrorOr<Tree> parse_expression();
ParseErrorOr<Tree> parse_condition();
ParseErrorOr<Tree> parse_return_statement();
ParseErrorOr<Tree> parse_assert();
ParseErrorOr<Tree> parse_assignment();
ParseErrorOr<Tree> parse_simple_step_or_inline_if_branch();
ParseErrorOr<IfConditionParseResult> parse_if_beginning();
ParseErrorOr<Tree> parse_inline_if_else();
ParseErrorOr<Tree> parse_if(Tree then_branch);
ParseErrorOr<Tree> parse_else(Tree else_branch);
Vector<Token> const& m_tokens;
size_t m_next_token_index = 0;
XML::Node const* m_node;
};
}