godot/modules/visual_script/visual_script_expression.h

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/*************************************************************************/
/* visual_script_expression.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 VISUALSCRIPTEXPRESSION_H
#define VISUALSCRIPTEXPRESSION_H
#include "visual_script.h"
#include "visual_script_builtin_funcs.h"
class VisualScriptExpression : public VisualScriptNode {
GDCLASS(VisualScriptExpression, VisualScriptNode);
friend class VisualScriptNodeInstanceExpression;
struct Input {
Variant::Type type;
String name;
Input() { type = Variant::NIL; }
};
Vector<Input> inputs;
Variant::Type output_type;
String expression;
bool sequenced;
int str_ofs;
bool expression_dirty;
bool _compile_expression();
enum TokenType {
TK_CURLY_BRACKET_OPEN,
TK_CURLY_BRACKET_CLOSE,
TK_BRACKET_OPEN,
TK_BRACKET_CLOSE,
TK_PARENTHESIS_OPEN,
TK_PARENTHESIS_CLOSE,
TK_IDENTIFIER,
TK_BUILTIN_FUNC,
TK_SELF,
TK_CONSTANT,
TK_BASIC_TYPE,
TK_COLON,
TK_COMMA,
TK_PERIOD,
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_BIT_AND,
TK_OP_BIT_OR,
TK_OP_BIT_XOR,
TK_OP_BIT_INVERT,
TK_EOF,
TK_ERROR,
TK_MAX
};
static const char *token_name[TK_MAX];
struct Token {
TokenType type;
Variant value;
};
void _set_error(const String &p_err) {
if (error_set)
return;
error_str = p_err;
error_set = true;
}
Error _get_token(Token &r_token);
String error_str;
bool error_set;
struct ENode {
enum Type {
TYPE_INPUT,
TYPE_CONSTANT,
TYPE_SELF,
TYPE_OPERATOR,
TYPE_INDEX,
TYPE_NAMED_INDEX,
TYPE_ARRAY,
TYPE_DICTIONARY,
TYPE_CONSTRUCTOR,
TYPE_BUILTIN_FUNC,
TYPE_CALL
};
ENode *next;
Type type;
ENode() { next = NULL; }
virtual ~ENode() {
if (next) {
memdelete(next);
}
}
};
struct Expression {
bool is_op;
union {
Variant::Operator op;
ENode *node;
};
};
ENode *_parse_expression();
struct InputNode : public ENode {
int index;
InputNode() {
type = TYPE_INPUT;
}
};
struct ConstantNode : public ENode {
Variant value;
ConstantNode() {
type = TYPE_CONSTANT;
}
};
struct OperatorNode : public ENode {
Variant::Operator op;
ENode *nodes[2];
OperatorNode() {
type = TYPE_OPERATOR;
}
};
struct SelfNode : public ENode {
SelfNode() {
type = TYPE_SELF;
}
};
struct IndexNode : public ENode {
ENode *base;
ENode *index;
IndexNode() {
type = TYPE_INDEX;
}
};
struct NamedIndexNode : public ENode {
ENode *base;
StringName name;
NamedIndexNode() {
type = TYPE_NAMED_INDEX;
}
};
struct ConstructorNode : public ENode {
Variant::Type data_type;
Vector<ENode *> arguments;
ConstructorNode() {
type = TYPE_CONSTRUCTOR;
}
};
struct CallNode : public ENode {
ENode *base;
StringName method;
Vector<ENode *> arguments;
CallNode() {
type = TYPE_CALL;
}
};
struct ArrayNode : public ENode {
Vector<ENode *> array;
ArrayNode() {
type = TYPE_ARRAY;
}
};
struct DictionaryNode : public ENode {
Vector<ENode *> dict;
DictionaryNode() {
type = TYPE_DICTIONARY;
}
};
struct BuiltinFuncNode : public ENode {
VisualScriptBuiltinFunc::BuiltinFunc func;
Vector<ENode *> arguments;
BuiltinFuncNode() {
type = TYPE_BUILTIN_FUNC;
}
};
template <class T>
T *alloc_node() {
T *node = memnew(T);
node->next = nodes;
nodes = node;
return node;
}
ENode *root;
ENode *nodes;
protected:
bool _set(const StringName &p_name, const Variant &p_value);
bool _get(const StringName &p_name, Variant &r_ret) const;
void _get_property_list(List<PropertyInfo> *p_list) const;
public:
virtual int get_output_sequence_port_count() const;
virtual bool has_input_sequence_port() const;
virtual String get_output_sequence_port_text(int p_port) const;
virtual int get_input_value_port_count() const;
virtual int get_output_value_port_count() const;
virtual PropertyInfo get_input_value_port_info(int p_idx) const;
virtual PropertyInfo get_output_value_port_info(int p_idx) const;
virtual String get_caption() const;
virtual String get_text() const;
virtual String get_category() const { return "operators"; }
virtual VisualScriptNodeInstance *instance(VisualScriptInstance *p_instance);
VisualScriptExpression();
~VisualScriptExpression();
};
void register_visual_script_expression_node();
#endif // VISUALSCRIPTEXPRESSION_H