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LogoGrammar.cs
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LogoGrammar.cs
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using Irony.Interpreter.Ast;
using Irony.Parsing;
using System;
namespace LogoSharp
{
[Language("Logo Sharp", "1.0", "Logo programming language for managed world.")]
public class LogoGrammar : Grammar
{
public LogoGrammar()
: base(false)
{
// Literals
var decimal_number = new NumberLiteral("DECIMAL")
{
// integer_number.DefaultIntTypes = new[] { TypeCode.Int16, TypeCode.Int32, TypeCode.Int64 };
DefaultFloatType = TypeCode.Single
};
// identifiers
var identifier = new IdentifierTerminal("IDENTIFIER");
// comments
var COMMENT = new CommentTerminal("COMMENT", ";", "\r", "\n", "\u2085", "\u2028", "\u2029");
NonGrammarTerminals.Add(COMMENT);
// Non terminals
// 10. Expressions
var VARIABLE = new NonTerminal("VARIABLE");
var VARIABLE_REF = new NonTerminal("VARIABLE_REF");
var EXPRESSION = new NonTerminal("EXPRESSION");
var BINARY_OPERATOR = new NonTerminal("BINARY_OPERATOR");
var BINARY_EXPRESSION = new NonTerminal("BINARY_EXPRESSION", typeof(BinaryOperationNode));
var UNARY_OPERATOR = new NonTerminal("UNARY_OPERATOR");
var UNARY_EXPRESSION = new NonTerminal("UNARY_EXPRESSION");
var REP_COUNT_EXPRESSION = new NonTerminal("REP_COUNT");
// 15. Assignments
var ASSIGNMENT = new NonTerminal("ASSIGNMENT");
// 20. Procedures
var PROCEDURE_DECLARE = new NonTerminal("PROCEDURE_DECLARE");
var PROCEDURE_BODY = new NonTerminal("PROCEDURE_BODY");
var PROCEDURE_END = new NonTerminal("PROCEDURE_END");
var PROCEDURE = new NonTerminal("PROCEDURE");
var PROCEDURE_CALL = new NonTerminal("PROCEDURE_CALL");
var PROCEDURE_CALL_ARGUMENTS = new NonTerminal("PROCEDURE_CALL_ARGUMENTS");
var PROCEDURE_ARGUMENT = new NonTerminal("PROCEDURE_ARGUMENT");
var PROCEDURE_ARGUMENTS = new NonTerminal("PROCEDURE_ARGUMENTS");
// 30. Functions
var FUNCTION_CALL = new NonTerminal("FUNCTION_CALL");
var FUNCTION_CALL_ARGUMENTS = new NonTerminal("FUNCTION_CALL_ARGUMENTS");
// 50. Basic
var LSB = new NonTerminal("LEFT_SQUARE_BRACKET");
var RSB = new NonTerminal("RIGHT_SQUARE_BRACKET");
var LPS = new NonTerminal("LEFT_PARENTHESIS");
var RPS = new NonTerminal("RIGHT_PARENTHESIS");
// 100. Program
var PROGRAM = new NonTerminal("PROGRAM");
// 150. Tuples
var TUPLE = new NonTerminal("TUPLE");
var TUPLEARGS = new NonTerminal("TUPLEARGS");
// 200. Drawing commands
var LT = new NonTerminal("LEFT");
var RT = new NonTerminal("RIGHT");
var BK = new NonTerminal("BACKWARD");
var FD = new NonTerminal("FORWARD");
var ARC = new NonTerminal("ARC");
var DELAY = new NonTerminal("DELAY");
var DRAW = new NonTerminal("DRAW");
var HOME = new NonTerminal("HOME");
var SHOW_TURTLE = new NonTerminal("SHOWTURTLE");
var HIDE_TURTLE = new NonTerminal("HIDETURTLE");
var DRAWING_COMMAND = new NonTerminal("DRAWING_COMMAND");
var BASIC_CONTROL_COMMAND = new NonTerminal("BASIC_CONTROL_COMMAND");
// 250. Pen commands
var COLOR_VALUE = new NonTerminal("COLOR_VALUE");
var COLOR_VALUE_TUPLE = new NonTerminal("COLOR_VALUE_TUPLE");
var PC = new NonTerminal("PEN_COLOR");
var PE = new NonTerminal("PEN_ERASE");
var PN = new NonTerminal("PEN_NORMAL");
var PEN_DOWN = new NonTerminal("PEN_DOWN");
var PEN_UP = new NonTerminal("PEN_UP");
var SET_PEN_SIZE = new NonTerminal("SET_PEN_SIZE");
var SET_PEN_COLOR = new NonTerminal("SET_PEN_COLOR");
var PEN_COMMAND = new NonTerminal("PEN_COMMAND");
var BASIC_COMMAND = new NonTerminal("BASIC_COMMAND");
// 300. Flow Controls
var REPEAT_COMMAND = new NonTerminal("REPEAT_COMMAND");
var REPEAT_BODY = new NonTerminal("REPEAT_BODY");
var FLOW_CONTROL_COMMAND = new NonTerminal("FLOW_CONTROL_COMMAND");
// 350. Final command
var COMMAND_LINE = new NonTerminal("COMMAND_LINE");
var COMMAND = new NonTerminal("COMMAND");
LSB.Rule = ToTerm("[");
RSB.Rule = ToTerm("]");
LPS.Rule = ToTerm("(");
RPS.Rule = ToTerm(")");
TUPLE.Rule = MakeStarRule(TUPLE, EXPRESSION);
TUPLEARGS.Rule = LSB + TUPLE + RSB;
VARIABLE.Rule = "\"" + identifier;
VARIABLE_REF.Rule = ":" + identifier;
REP_COUNT_EXPRESSION.Rule = ToTerm("REPCOUNT");
EXPRESSION.Rule = decimal_number |
VARIABLE_REF | FUNCTION_CALL |
REP_COUNT_EXPRESSION |
BINARY_EXPRESSION |
"(" + EXPRESSION + ")" |
UNARY_EXPRESSION;
UNARY_OPERATOR.Rule = ToTerm("-") | "+";
UNARY_EXPRESSION.Rule = UNARY_OPERATOR + EXPRESSION;
BINARY_OPERATOR.Rule = ToTerm("+") | "-" | "*" | "/" | "^";
BINARY_EXPRESSION.Rule = EXPRESSION + BINARY_OPERATOR + EXPRESSION;
ASSIGNMENT.Rule = "make" + VARIABLE + EXPRESSION;
LT.Rule = ToTerm("LT") | ToTerm("LEFT");
RT.Rule = ToTerm("RT") | ToTerm("RIGHT");
FD.Rule = ToTerm("FD") | ToTerm("FORWARD");
BK.Rule = ToTerm("BK") | ToTerm("BACKWARD") | ToTerm("BACK");
ARC.Rule = ToTerm("ARC") | ToTerm("ARC2");
DELAY.Rule = ToTerm("DELAY");
DRAW.Rule = ToTerm("CLS") | ToTerm("DRAW") | ToTerm("CLEARSCR") | ToTerm("CLEARSCREEN") | ToTerm("CS");
HOME.Rule = ToTerm("HOME");
SHOW_TURTLE.Rule = ToTerm("SHOWTURTLE") | ToTerm("ST");
HIDE_TURTLE.Rule = ToTerm("HIDETURTLE") | ToTerm("HT");
DRAWING_COMMAND.Rule = LT + EXPRESSION |
RT + EXPRESSION |
FD + EXPRESSION |
BK + EXPRESSION |
ARC + EXPRESSION |
DELAY + decimal_number | DRAW;
BASIC_CONTROL_COMMAND.Rule = HOME | SHOW_TURTLE | HIDE_TURTLE;
COLOR_VALUE_TUPLE.Rule = TUPLEARGS;
COLOR_VALUE.Rule = COLOR_VALUE_TUPLE | EXPRESSION;
PC.Rule = ToTerm("SETPENCOLOR") | "SETPC" | "PC";
PE.Rule = ToTerm("PENERASE") | "PE";
PN.Rule = ToTerm("PENNORMAL") | "PN";
PEN_DOWN.Rule = ToTerm("PD") | "PENDOWN";
PEN_UP.Rule = ToTerm("PU") | "PENUP";
SET_PEN_SIZE.Rule = ToTerm("SETPENSIZE") + TUPLEARGS;
SET_PEN_COLOR.Rule = PC + COLOR_VALUE;
PEN_COMMAND.Rule = PEN_DOWN | PEN_UP | SET_PEN_COLOR | SET_PEN_SIZE | PE | PN;
REPEAT_BODY.Rule = MakeStarRule(REPEAT_BODY, COMMAND_LINE);
REPEAT_COMMAND.Rule = ToTerm("REPEAT") + EXPRESSION + LSB + REPEAT_BODY + RSB;
BASIC_COMMAND.Rule = DRAWING_COMMAND | PEN_COMMAND | BASIC_CONTROL_COMMAND;
FLOW_CONTROL_COMMAND.Rule = REPEAT_COMMAND;
COMMAND_LINE.Rule = BASIC_COMMAND | FLOW_CONTROL_COMMAND | ASSIGNMENT | PROCEDURE_CALL;
COMMAND.Rule = COMMAND_LINE | Empty + NewLine;
PROCEDURE_ARGUMENT.Rule = VARIABLE_REF;
PROCEDURE_ARGUMENTS.Rule = MakeStarRule(PROCEDURE_ARGUMENTS, PROCEDURE_ARGUMENT);
PROCEDURE_DECLARE.Rule = ToTerm("TO") + identifier + PROCEDURE_ARGUMENTS + NewLine;
PROCEDURE_BODY.Rule = MakeStarRule(PROCEDURE_BODY, COMMAND);
PROCEDURE_END.Rule = ToTerm("END") + NewLine;
PROCEDURE.Rule = PROCEDURE_DECLARE + PROCEDURE_BODY + PROCEDURE_END;
PROCEDURE_CALL_ARGUMENTS.Rule = MakeStarRule(PROCEDURE_CALL_ARGUMENTS, EXPRESSION);
PROCEDURE_CALL.Rule = identifier + PROCEDURE_CALL_ARGUMENTS;
FUNCTION_CALL_ARGUMENTS.Rule = MakeStarRule(FUNCTION_CALL_ARGUMENTS, EXPRESSION);
FUNCTION_CALL.Rule = "{" + identifier + FUNCTION_CALL_ARGUMENTS + "}";
var COMMANDS = new NonTerminal("COMMANDS");
COMMANDS.Rule = MakePlusRule(COMMANDS, COMMAND);
var PROCEDURES = new NonTerminal("PROCEDURES");
PROCEDURES.Rule = MakeStarRule(PROCEDURES, PROCEDURE);
var PROGRAM_BODY = new NonTerminal("PROGRAM_BODY");
PROGRAM_BODY.Rule = PROCEDURE | COMMAND;
PROGRAM.Rule = MakePlusRule(PROGRAM, PROGRAM_BODY);
RegisterOperators(60, "^");
RegisterOperators(50, "*", "/");
RegisterOperators(40, "+", "-");
RegisterBracePair("[", "]");
RegisterBracePair("(", ")");
RegisterBracePair("{", "}");
MarkPunctuation(LPS, RPS);
MarkPunctuation(LSB, RSB);
MarkTransient(COMMAND,
COMMAND_LINE,
COLOR_VALUE,
COLOR_VALUE_TUPLE,
PROCEDURE_ARGUMENT,
BASIC_COMMAND,
FLOW_CONTROL_COMMAND,
TUPLEARGS,
PROGRAM_BODY,
BINARY_OPERATOR,
UNARY_OPERATOR
);
this.Root = PROGRAM;
}
}
}