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90 lines
2.9 KiB
C++
90 lines
2.9 KiB
C++
/*
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* Copyright (C) 2014 Patrick Mours
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#pragma once
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#include "effect_symbol_table.hpp"
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#include <memory> // std::unique_ptr
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namespace reshadefx
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{
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/// <summary>
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/// A parser for the ReShade FX shader language.
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/// </summary>
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class parser : symbol_table
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{
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public:
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// Define constructor explicitly because lexer class is not included here
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parser();
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~parser();
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/// <summary>
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/// Parses the provided input string.
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/// </summary>
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/// <param name="source">String to analyze.</param>
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/// <param name="backend">Code generation implementation to use.</param>
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/// <returns><see langword="true"/> if parsing was successfull, <see langword="false"/> otherwise.</returns>
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bool parse(std::string source, class codegen *backend);
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/// <summary>
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/// Gets the list of error messages.
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/// </summary>
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const std::string &errors() const { return _errors; }
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private:
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void error(const location &location, unsigned int code, const std::string &message);
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void warning(const location &location, unsigned int code, const std::string &message);
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void backup();
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void restore();
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bool peek(char tok) const { return _token_next.id == static_cast<tokenid>(tok); }
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bool peek(tokenid tokid) const { return _token_next.id == tokid; }
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void consume();
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void consume_until(char tok) { return consume_until(static_cast<tokenid>(tok)); }
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void consume_until(tokenid tokid);
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bool accept(char tok) { return accept(static_cast<tokenid>(tok)); }
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bool accept(tokenid tokid);
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bool expect(char tok) { return expect(static_cast<tokenid>(tok)); }
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bool expect(tokenid tokid);
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bool accept_symbol(std::string &identifier, scoped_symbol &symbol);
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bool accept_type_class(type &type);
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bool accept_type_qualifiers(type &type);
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bool accept_unary_op();
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bool accept_postfix_op();
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bool peek_multary_op(unsigned int &precedence) const;
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bool accept_assignment_op();
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bool parse_top(bool &parse_success);
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bool parse_struct();
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bool parse_function(type type, std::string name, shader_type stype, int num_threads[3]);
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bool parse_variable(type type, std::string name, bool global = false);
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bool parse_technique();
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bool parse_technique_pass(pass &info);
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bool parse_type(type &type);
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bool parse_array_length(type &type);
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bool parse_expression(expression &expression);
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bool parse_expression_unary(expression &expression);
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bool parse_expression_multary(expression &expression, unsigned int precedence = 0);
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bool parse_expression_assignment(expression &expression);
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bool parse_annotations(std::vector<annotation> &annotations);
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bool parse_statement(bool scoped);
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bool parse_statement_block(bool scoped);
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std::string _errors;
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std::unique_ptr<class lexer> _lexer;
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class codegen *_codegen = nullptr;
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token _token;
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token _token_next;
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token _token_backup;
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std::vector<uint32_t> _loop_break_target_stack;
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std::vector<uint32_t> _loop_continue_target_stack;
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};
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}
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