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Time for an 2014 update…

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Ingy döt Net 2014-01-17 05:32:22 +00:00
parent 372c577f83
commit 09687c4926
2520 changed files with 34227 additions and 7318 deletions
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381
Task/Arithmetic-evaluation/Elena/arithmetic-evaluation-1.elena
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@ -1,285 +1,302 @@
#define std'dictionary'*.
#define std'basic'*.
#define std'patterns'*.
#define ext'io'*.
#define ext'convertors'*.
#define system.
#define extensions.
#subject parse_order.
// --- Token ---
#class Token
{
#field theValue.
#initializer
#constructor new
[
theValue := String.
theValue := String new.
]
#method parse_order'get = 0.
#constructor new : aValue
[
theValue := String new:aValue.
]
#method += aChar
#method ParseOrder = 0.
#method append : aChar
[
theValue += aChar.
]
#method + aNode
#method add : aNode
[
^ aNode += self.
]
#method numeric = Real64Value &&literal:theValue &:erealformatter.
#method Number = convertor toReal:theValue.
}
// --- Node ---
#class Node
{
#field theLeft.
#field theRight.
#field theState.
#role LeftAssigned
{
#method += aNode
[
theRight := aNode.
#shift.
]
}
#role Empty
{
#method += aNode
[
theLeft := aNode.
#shift LeftAssigned.
]
}
#initializer
#method setRight : aNode
[
#shift Empty.
theRight := aNode.
theState := %appendRight.
]
#method + aNode
#method setLeft : aNode
[
#if (self parse_order > aNode parse_order)?
[
self += aNode.
]
| [
aNode += self.
theLeft := aNode.
^ aNode.
].
theState := %setRight.
]
#method += aNode
#constructor new
[
#if (theRight parse_order > aNode parse_order)?
[
theState := %setLeft.
]
#method add : aNode
= (self ParseOrder > aNode ParseOrder)
? [
self += aNode.
^ self.
]
! [
aNode += self.
^ aNode.
].
#method appendRight : aNode
[
(theRight ParseOrder > aNode ParseOrder)
? [
theRight += aNode.
]
| [
! [
theRight := aNode += theRight.
].
]
#method append : anObject
= $self~theState eval:anObject.
#method => theState.
}
#class SummaryNode (Node)
// --- SummaryNode
#class SummaryNode : Node
{
#method parse_order'get = 2.
#method ParseOrder = 2.
#method numeric = theLeft numeric + theRight numeric.
#method Number = theLeft Number + theRight Number.
}
#class DifferenceNode (Node)
// --- DifferenceNode ---
#class DifferenceNode : Node
{
#method parse_order'get = 2.
#method ParseOrder = 2.
#method numeric = theLeft numeric - theRight numeric.
#method Number = theLeft Number - theRight Number.
}
#class ProductNode (Node)
// --- ProductNode ---
#class ProductNode : Node
{
#method parse_order'get = 1.
#method ParseOrder = 1.
#method numeric = theLeft numeric * theRight numeric.
#method Number = theLeft Number * theRight Number.
}
#class FractionNode (Node)
// --- FractionNode ---
#class FractionNode : Node
{
#method parse_order'get = 1.
#method ParseOrder = 1.
#method numeric = theLeft numeric / theRight numeric.
#method Number = theLeft Number / theRight Number.
}
// --- SubExpression ---
#class SubExpression
{
#field theParser.
#field theCounter.
#role EOF
{
#method available'is [ control fail. ]
#method += aChar [ $self fail. ]
}
#initializer
#constructor new
[
theParser := arithmeval'Parser.
theCounter := Integer << 1.
theParser := arithmeval'Parser new.
theCounter := Integer new:1.
]
#method available'is []
#method ParseOrder = 0.
#method parse_order'get = 0.
#method + aNode
#method add : aNode
[
^ aNode += self.
]
#method append : aChar
#method validate
[
#if control if:(aChar == 41)
[
theCounter -= 1.
]
| if:(aChar == 40)
[
theCounter += 1.
].
(theCounter < 0)
? [ #throw Exception new:"Invalid expression". ].
#if (theCounter == 0)?
[ #shift EOF. ^ $self. ].
theParser evaluate:aChar.
^ (0 == theCounter).
]
#method numeric = theParser numeric.
#method append : aChar
[
aChar =>
41 ? [
theCounter -= 1.
]
40 ? [ theCounter += 1 ]
! [ theParser evaluate:aChar ].
]
#method Number
= $self validate
? [ theParser Number ]
! [ #throw Exception new:"Invalid expression". ].
}
#class Parser
// ---- Parser ----
#class Parser : system'routines'BasePattern
{
#field theToken.
#field theTopNode.
#field theState.
#role Brackets
{
#method evaluate : aChar
[
theToken += aChar.
#method onBrackets : aChar
[
theToken += aChar.
#if theToken available'is
| [
#shift.
].
]
}
#role Start
{
#method evaluate : aChar
[
#if (40 == aChar)?
[
theToken := SubExpression.
(theToken validate)
? [
theState := %onDigit.
].
]
#method onStart : aChar
[
aChar =>
40 ? [ // (
theToken := SubExpression new.
theTopNode := theToken.
#shift Brackets.
theState := %onBrackets.
]
| [
theToken := Token.
45 ? [ // -
theToken := DifferenceNode new add:(Token new:"0").
theTopNode := theToken.
theToken += aChar.
theState := %onOperator.
]
! [
theToken := Token new.
theTopNode := theToken.
theState := %onDigit.
#shift.
$self appendDigit:aChar.
].
]
}
#role Operator
{
#method evaluate : aChar
[
#if Control if:(48 < aChar) if:(58 > aChar)
[
theToken := (Token += aChar).
theTopNode += theToken.
#shift.
]
| if:(40 == aChar)
[
theToken := SubExpression.
theTopNode += theToken.
#shift Brackets.
]
| [ $self fail. ].
]
}
#initializer
[
#shift Start.
]
#method numeric = theTopNode numeric.
#method evaluate : aChar
#method onOperator : aChar
[
#if Control if:(48 < aChar) if:(58 > aChar)
[
aChar =>
40 ? [
theToken := SubExpression new.
theTopNode += theToken.
theState := %onBrackets.
]
! [
theToken := Token new.
theTopNode += theToken.
theState := %onDigit.
$self appendDigit:aChar.
].
]
#constructor new
[
theState := %onStart.
]
#method Number = theTopNode Number.
#method appendDigit : aChar
[
(aChar >= 48) and:(aChar < 58)
? [
theToken += aChar.
]
| if:(42 == aChar) // *
[
theTopNode := theTopNode + ProductNode.
#shift Operator.
! [
#throw Exception new:"Invalid expression".
]
| if:(47 == aChar) // /
[
theTopNode := theTopNode + FractionNode.
#shift Operator.
]
| if:(43 == aChar) // +
[
theTopNode := theTopNode + SummaryNode.
#shift Operator.
]
| if:(45 == aChar) // -
[
theTopNode := theTopNode + DifferenceNode.
#shift Operator.
]
| if:(40 == aChar)
[
theToken := SubExpression.
theTopNode := theToken.
#shift Brackets.
]
| [ $self fail. ].
]
#method start : aProcess
#method onDigit : aChar
[
aProcess run:self.
aChar =>
40 ? [ // (
theToken := SubExpression new.
theTopNode := theToken.
theState := %onBrackets.
]
42 ? [ // *
theTopNode := theTopNode + ProductNode new.
^ self numeric.
theState := %onOperator.
]
43 ? [ // +
theTopNode := theTopNode + SummaryNode new.
theState := %onOperator.
]
45 ? [ // -
theTopNode := theTopNode + DifferenceNode new.
theState := %onOperator.
]
47 ? // /
[
theTopNode := theTopNode + FractionNode new.
theState := %onOperator.
]
! [
$self appendDigit:aChar.
].
]
#method eval : aChar = $self~theState eval:aChar.
}
#symbol Program =
#symbol program =
[
#var aText := String.
#var aText := String new.
#while ((Console >> aText) length > 0)?
control while:(consoleEx readLine:aText length > 0) &do:
[
#var aParser := Parser.
#var aParser := Parser new.
Console << "=" << aParser start:Scan::aText | ^^"Invalid Expression".
Console << "%n".
consoleEx writeLine:"=" :(aParser foreach:aText Number)
| ifFailed:
[
consoleEx writeLine:"Invalid Expression".
].
].
].