d95794ec8a
As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see".
276 lines
7.3 KiB
C++
276 lines
7.3 KiB
C++
/**************************************************************************/
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/* gdscript_tokenizer.h */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#ifndef GDSCRIPT_TOKENIZER_H
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#define GDSCRIPT_TOKENIZER_H
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#include "core/templates/hash_map.h"
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#include "core/templates/hash_set.h"
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#include "core/templates/list.h"
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#include "core/templates/vector.h"
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#include "core/variant/variant.h"
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class GDScriptTokenizer {
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public:
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enum CursorPlace {
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CURSOR_NONE,
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CURSOR_BEGINNING,
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CURSOR_MIDDLE,
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CURSOR_END,
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};
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struct Token {
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enum Type {
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EMPTY,
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// Basic
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ANNOTATION,
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IDENTIFIER,
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LITERAL,
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// Comparison
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LESS,
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LESS_EQUAL,
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GREATER,
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GREATER_EQUAL,
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EQUAL_EQUAL,
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BANG_EQUAL,
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// Logical
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AND,
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OR,
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NOT,
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AMPERSAND_AMPERSAND,
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PIPE_PIPE,
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BANG,
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// Bitwise
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AMPERSAND,
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PIPE,
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TILDE,
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CARET,
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LESS_LESS,
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GREATER_GREATER,
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// Math
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PLUS,
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MINUS,
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STAR,
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STAR_STAR,
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SLASH,
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PERCENT,
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// Assignment
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EQUAL,
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PLUS_EQUAL,
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MINUS_EQUAL,
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STAR_EQUAL,
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STAR_STAR_EQUAL,
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SLASH_EQUAL,
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PERCENT_EQUAL,
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LESS_LESS_EQUAL,
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GREATER_GREATER_EQUAL,
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AMPERSAND_EQUAL,
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PIPE_EQUAL,
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CARET_EQUAL,
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// Control flow
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IF,
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ELIF,
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ELSE,
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FOR,
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WHILE,
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BREAK,
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CONTINUE,
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PASS,
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RETURN,
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MATCH,
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// Keywords
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AS,
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ASSERT,
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AWAIT,
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BREAKPOINT,
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CLASS,
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CLASS_NAME,
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CONST,
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ENUM,
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EXTENDS,
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FUNC,
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IN,
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IS,
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NAMESPACE,
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PRELOAD,
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SELF,
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SIGNAL,
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STATIC,
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SUPER,
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TRAIT,
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VAR,
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VOID,
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YIELD,
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// Punctuation
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BRACKET_OPEN,
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BRACKET_CLOSE,
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BRACE_OPEN,
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BRACE_CLOSE,
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PARENTHESIS_OPEN,
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PARENTHESIS_CLOSE,
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COMMA,
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SEMICOLON,
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PERIOD,
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PERIOD_PERIOD,
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COLON,
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DOLLAR,
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FORWARD_ARROW,
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UNDERSCORE,
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// Whitespace
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NEWLINE,
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INDENT,
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DEDENT,
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// Constants
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CONST_PI,
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CONST_TAU,
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CONST_INF,
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CONST_NAN,
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// Error message improvement
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VCS_CONFLICT_MARKER,
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BACKTICK,
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QUESTION_MARK,
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// Special
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ERROR,
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TK_EOF, // "EOF" is reserved
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TK_MAX
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};
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Type type = EMPTY;
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Variant literal;
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int start_line = 0, end_line = 0, start_column = 0, end_column = 0;
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int leftmost_column = 0, rightmost_column = 0; // Column span for multiline tokens.
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int cursor_position = -1;
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CursorPlace cursor_place = CURSOR_NONE;
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String source;
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const char *get_name() const;
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bool is_identifier() const;
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bool is_node_name() const;
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StringName get_identifier() const { return source; }
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Token(Type p_type) {
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type = p_type;
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}
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Token() {
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}
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};
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#ifdef TOOLS_ENABLED
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struct CommentData {
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String comment;
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bool new_line = false;
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CommentData() {}
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CommentData(const String &p_comment, bool p_new_line) {
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comment = p_comment;
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new_line = p_new_line;
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}
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};
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const HashMap<int, CommentData> &get_comments() const {
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return comments;
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}
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#endif // TOOLS_ENABLED
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private:
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String source;
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const char32_t *_source = nullptr;
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const char32_t *_current = nullptr;
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int line = -1, column = -1;
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int cursor_line = -1, cursor_column = -1;
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int tab_size = 4;
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// Keep track of multichar tokens.
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const char32_t *_start = nullptr;
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int start_line = 0, start_column = 0;
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int leftmost_column = 0, rightmost_column = 0;
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// Info cache.
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bool line_continuation = false; // Whether this line is a continuation of the previous, like when using '\'.
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bool multiline_mode = false;
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List<Token> error_stack;
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bool pending_newline = false;
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Token last_newline;
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int pending_indents = 0;
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List<int> indent_stack;
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List<List<int>> indent_stack_stack; // For lambdas, which require manipulating the indentation point.
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List<char32_t> paren_stack;
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char32_t indent_char = '\0';
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int position = 0;
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int length = 0;
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#ifdef TOOLS_ENABLED
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HashMap<int, CommentData> comments;
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#endif // TOOLS_ENABLED
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_FORCE_INLINE_ bool _is_at_end() { return position >= length; }
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_FORCE_INLINE_ char32_t _peek(int p_offset = 0) { return position + p_offset >= 0 && position + p_offset < length ? _current[p_offset] : '\0'; }
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int indent_level() const { return indent_stack.size(); }
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bool has_error() const { return !error_stack.is_empty(); }
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Token pop_error();
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char32_t _advance();
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String _get_indent_char_name(char32_t ch);
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void _skip_whitespace();
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void check_indent();
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Token make_error(const String &p_message);
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void push_error(const String &p_message);
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void push_error(const Token &p_error);
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Token make_paren_error(char32_t p_paren);
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Token make_token(Token::Type p_type);
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Token make_literal(const Variant &p_literal);
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Token make_identifier(const StringName &p_identifier);
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Token check_vcs_marker(char32_t p_test, Token::Type p_double_type);
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void push_paren(char32_t p_char);
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bool pop_paren(char32_t p_expected);
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void newline(bool p_make_token);
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Token number();
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Token potential_identifier();
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Token string();
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Token annotation();
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public:
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Token scan();
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void set_source_code(const String &p_source_code);
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int get_cursor_line() const;
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int get_cursor_column() const;
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void set_cursor_position(int p_line, int p_column);
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void set_multiline_mode(bool p_state);
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bool is_past_cursor() const;
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static String get_token_name(Token::Type p_token_type);
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void push_expression_indented_block(); // For lambdas, or blocks inside expressions.
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void pop_expression_indented_block(); // For lambdas, or blocks inside expressions.
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GDScriptTokenizer();
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};
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#endif // GDSCRIPT_TOKENIZER_H
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