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godot/modules/gdscript/gdscript_tokenizer.h
Rémi Verschelde a7f49ac9a1 Update copyright statements to 2020 
Happy new year to the wonderful Godot community!

We're starting a new decade with a well-established, non-profit, free
and open source game engine, and tons of further improvements in the
pipeline from hundreds of contributors.

Godot will keep getting better, and we're looking forward to all the
games that the community will keep developing and releasing with it.
2020-01-01 11:16:22 +01:00

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/*************************************************************************/
/* gdscript_tokenizer.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef GDSCRIPT_TOKENIZER_H
#define GDSCRIPT_TOKENIZER_H
#include "core/pair.h"
#include "core/string_name.h"
#include "core/ustring.h"
#include "core/variant.h"
#include "core/vmap.h"
#include "gdscript_functions.h"
class GDScriptTokenizer {
public:
enum Token {
TK_EMPTY,
TK_IDENTIFIER,
TK_CONSTANT,
TK_SELF,
TK_BUILT_IN_TYPE,
TK_BUILT_IN_FUNC,
TK_OP_IN,
TK_OP_EQUAL,
TK_OP_NOT_EQUAL,
TK_OP_LESS,
TK_OP_LESS_EQUAL,
TK_OP_GREATER,
TK_OP_GREATER_EQUAL,
TK_OP_AND,
TK_OP_OR,
TK_OP_NOT,
TK_OP_ADD,
TK_OP_SUB,
TK_OP_MUL,
TK_OP_DIV,
TK_OP_MOD,
TK_OP_SHIFT_LEFT,
TK_OP_SHIFT_RIGHT,
TK_OP_ASSIGN,
TK_OP_ASSIGN_ADD,
TK_OP_ASSIGN_SUB,
TK_OP_ASSIGN_MUL,
TK_OP_ASSIGN_DIV,
TK_OP_ASSIGN_MOD,
TK_OP_ASSIGN_SHIFT_LEFT,
TK_OP_ASSIGN_SHIFT_RIGHT,
TK_OP_ASSIGN_BIT_AND,
TK_OP_ASSIGN_BIT_OR,
TK_OP_ASSIGN_BIT_XOR,
TK_OP_BIT_AND,
TK_OP_BIT_OR,
TK_OP_BIT_XOR,
TK_OP_BIT_INVERT,
//TK_OP_PLUS_PLUS,
//TK_OP_MINUS_MINUS,
TK_CF_IF,
TK_CF_ELIF,
TK_CF_ELSE,
TK_CF_FOR,
TK_CF_WHILE,
TK_CF_BREAK,
TK_CF_CONTINUE,
TK_CF_PASS,
TK_CF_RETURN,
TK_CF_MATCH,
TK_PR_FUNCTION,
TK_PR_CLASS,
TK_PR_CLASS_NAME,
TK_PR_EXTENDS,
TK_PR_IS,
TK_PR_ONREADY,
TK_PR_TOOL,
TK_PR_STATIC,
TK_PR_EXPORT,
TK_PR_SETGET,
TK_PR_CONST,
TK_PR_VAR,
TK_PR_AS,
TK_PR_VOID,
TK_PR_ENUM,
TK_PR_PRELOAD,
TK_PR_ASSERT,
TK_PR_YIELD,
TK_PR_SIGNAL,
TK_PR_BREAKPOINT,
TK_PR_REMOTE,
TK_PR_SYNC,
TK_PR_MASTER,
TK_PR_SLAVE, // Deprecated by TK_PR_PUPPET, to remove in 4.0
TK_PR_PUPPET,
TK_PR_REMOTESYNC,
TK_PR_MASTERSYNC,
TK_PR_PUPPETSYNC,
TK_BRACKET_OPEN,
TK_BRACKET_CLOSE,
TK_CURLY_BRACKET_OPEN,
TK_CURLY_BRACKET_CLOSE,
TK_PARENTHESIS_OPEN,
TK_PARENTHESIS_CLOSE,
TK_COMMA,
TK_SEMICOLON,
TK_PERIOD,
TK_QUESTION_MARK,
TK_COLON,
TK_DOLLAR,
TK_FORWARD_ARROW,
TK_NEWLINE,
TK_CONST_PI,
TK_CONST_TAU,
TK_WILDCARD,
TK_CONST_INF,
TK_CONST_NAN,
TK_ERROR,
TK_EOF,
TK_CURSOR, //used for code completion
TK_MAX
};
protected:
enum StringMode {
STRING_SINGLE_QUOTE,
STRING_DOUBLE_QUOTE,
STRING_MULTILINE
};
static const char *token_names[TK_MAX];
public:
static const char *get_token_name(Token p_token);
bool is_token_literal(int p_offset = 0, bool variable_safe = false) const;
StringName get_token_literal(int p_offset = 0) const;
virtual const Variant &get_token_constant(int p_offset = 0) const = 0;
virtual Token get_token(int p_offset = 0) const = 0;
virtual StringName get_token_identifier(int p_offset = 0) const = 0;
virtual GDScriptFunctions::Function get_token_built_in_func(int p_offset = 0) const = 0;
virtual Variant::Type get_token_type(int p_offset = 0) const = 0;
virtual int get_token_line(int p_offset = 0) const = 0;
virtual int get_token_column(int p_offset = 0) const = 0;
virtual int get_token_line_indent(int p_offset = 0) const = 0;
virtual int get_token_line_tab_indent(int p_offset = 0) const = 0;
virtual String get_token_error(int p_offset = 0) const = 0;
virtual void advance(int p_amount = 1) = 0;
#ifdef DEBUG_ENABLED
virtual const Vector<Pair<int, String> > &get_warning_skips() const = 0;
virtual const Set<String> &get_warning_global_skips() const = 0;
virtual bool is_ignoring_warnings() const = 0;
#endif // DEBUG_ENABLED
virtual ~GDScriptTokenizer(){};
};
class GDScriptTokenizerText : public GDScriptTokenizer {
enum {
MAX_LOOKAHEAD = 4,
TK_RB_SIZE = MAX_LOOKAHEAD * 2 + 1
};
struct TokenData {
Token type;
StringName identifier; //for identifier types
Variant constant; //for constant types
union {
Variant::Type vtype; //for type types
GDScriptFunctions::Function func; //function for built in functions
int warning_code; //for warning skip
};
int line, col;
TokenData() {
type = TK_EMPTY;
line = col = 0;
vtype = Variant::NIL;
}
};
void _make_token(Token p_type);
void _make_newline(int p_indentation = 0, int p_tabs = 0);
void _make_identifier(const StringName &p_identifier);
void _make_built_in_func(GDScriptFunctions::Function p_func);
void _make_constant(const Variant &p_constant);
void _make_type(const Variant::Type &p_type);
void _make_error(const String &p_error);
String code;
int len;
int code_pos;
const CharType *_code;
int line;
int column;
TokenData tk_rb[TK_RB_SIZE * 2 + 1];
int tk_rb_pos;
String last_error;
bool error_flag;
#ifdef DEBUG_ENABLED
Vector<Pair<int, String> > warning_skips;
Set<String> warning_global_skips;
bool ignore_warnings;
#endif // DEBUG_ENABLED
void _advance();
public:
void set_code(const String &p_code);
virtual Token get_token(int p_offset = 0) const;
virtual StringName get_token_identifier(int p_offset = 0) const;
virtual GDScriptFunctions::Function get_token_built_in_func(int p_offset = 0) const;
virtual Variant::Type get_token_type(int p_offset = 0) const;
virtual int get_token_line(int p_offset = 0) const;
virtual int get_token_column(int p_offset = 0) const;
virtual int get_token_line_indent(int p_offset = 0) const;
virtual int get_token_line_tab_indent(int p_offset = 0) const;
virtual const Variant &get_token_constant(int p_offset = 0) const;
virtual String get_token_error(int p_offset = 0) const;
virtual void advance(int p_amount = 1);
#ifdef DEBUG_ENABLED
virtual const Vector<Pair<int, String> > &get_warning_skips() const { return warning_skips; }
virtual const Set<String> &get_warning_global_skips() const { return warning_global_skips; }
virtual bool is_ignoring_warnings() const { return ignore_warnings; }
#endif // DEBUG_ENABLED
};
class GDScriptTokenizerBuffer : public GDScriptTokenizer {
enum {
TOKEN_BYTE_MASK = 0x80,
TOKEN_BITS = 8,
TOKEN_MASK = (1 << TOKEN_BITS) - 1,
TOKEN_LINE_BITS = 24,
TOKEN_LINE_MASK = (1 << TOKEN_LINE_BITS) - 1,
};
Vector<StringName> identifiers;
Vector<Variant> constants;
VMap<uint32_t, uint32_t> lines;
Vector<uint32_t> tokens;
Variant nil;
int token;
public:
Error set_code_buffer(const Vector<uint8_t> &p_buffer);
static Vector<uint8_t> parse_code_string(const String &p_code);
virtual Token get_token(int p_offset = 0) const;
virtual StringName get_token_identifier(int p_offset = 0) const;
virtual GDScriptFunctions::Function get_token_built_in_func(int p_offset = 0) const;
virtual Variant::Type get_token_type(int p_offset = 0) const;
virtual int get_token_line(int p_offset = 0) const;
virtual int get_token_column(int p_offset = 0) const;
virtual int get_token_line_indent(int p_offset = 0) const;
virtual int get_token_line_tab_indent(int p_offset = 0) const { return 0; }
virtual const Variant &get_token_constant(int p_offset = 0) const;
virtual String get_token_error(int p_offset = 0) const;
virtual void advance(int p_amount = 1);
#ifdef DEBUG_ENABLED
virtual const Vector<Pair<int, String> > &get_warning_skips() const {
static Vector<Pair<int, String> > v;
return v;
}
virtual const Set<String> &get_warning_global_skips() const {
static Set<String> s;
return s;
}
virtual bool is_ignoring_warnings() const { return true; }
#endif // DEBUG_ENABLED
GDScriptTokenizerBuffer();
};
#endif // GDSCRIPT_TOKENIZER_H
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