please provide Java code for this project This project will be to write an inter

ID: 3750800 • Letter: P

Question

please provide Java code for this project

This project will be to write an interpreter for a minimal form of Julia. This minimal form of Julia has only 1 data type, integer, and the only identifiers are single letters.

The interpreter will parse a Julia program and build some intermediate data structures. These data structures will then be interpreted to execute the program. All tokens in this language are separated by white space. The parsing algorithm should detect any syntactical or semantic error. The first such error discovered should cause an appropriate error message to be printed, and then the interpreter should terminate. Run-time errors should also be detected with appropriate error messages being printed.

Grammar for the language

Parser

<program> function id ( ) <block> end

<if_statement> if <boolean_expression> <block> else <block> end

<while_statement> while <boolean_expression> <block> end

<assignment_statement> -> id <assignment_operator> <arithmetic_expression>

<for_statement> -> for id = <iter> <block> end

<print_statement> print ( <arithmetic_expression> )

<boolean_expression> <relative_op> <arithmetic_expression> <arithmetic_expression>

<arithmetic_expression> <id> | <literal_integer> | <binary_expression>

<binary_expression> <arithmetic_op> <arithmetic_expression> <arithmetic_expression>

Lexical Analyzer

id letter

literal_integer digit literal_integer | digit

assignment_operator =

le_operator <=

lt_operator <

ge_operator >=

gt_operator >

eq_operator = =

ne_operator !=

add_operator +

sub_operator -

mul_operator *

div_operator /

mod_operator %

rev_div_operator

exp_operator ^

Explanation / Answer

Given that,

This project consists of developing an interpreter for a minimal form (subset) of the Lua language. This minimal form of Lua has only 1 data type, integer, and the only identifiers are single letters. Lua is not case sensitive. The specification of the grammar is given below.

The interpreter will process a Lua program and build some intermediate data structures. These data structures will then be interpreted to execute the program. All tokens in this language are separated by white space. The parsing algorithm should detect any syntactical or semantic error. The first such error discovered should cause an appropriate error message to be printed, and then the interpreter should terminate. Run-time errors should also be detected with appropriate error messages being printed.

PROGRAM:-

form = Gui.Form{
   Text="Ledger Sheet", Width=700, Height=500, StartPosition="CenterScreen",
   Gui.SplitContainer {
       Dock="Fill", Width=700, SplitterDistance=200,
       Gui.TreeView{ Name="treeviewCategory", Dock="Fill", HideSelection=false },
       Gui.Panel{
           Dock="Fill",
           Gui.ListView{
               Name="listviewEntries", Dock="Fill", View="Details",
                       GridLines=true, FullRowSelect=true,
               ContextMenuStrip=Gui.ContextMenuStrip {
                   Gui.ToolStripMenuItem { Text="Delete",
                       Click=function(sender,e) DeleteEntry() end }
               }
           },
           Gui.StatusStrip { Name="statusStrip", Dock="Bottom" }
       }
   },
   Gui.ToolStrip{
       Dock="Top", Top=0, Left=0, Width=700, Height=25,
       Gui.ToolStripButton { Name="btnOpen", Text="&Open",
                               Width=88, Height=22, Image="icon\open.png" },
       Gui.ToolStripButton { Name="btnSave", Text="&Save",
                               Width=88, Height=22, Image="icon\save.png" },
       Gui.ToolStripButton { Name="btnAdd", Text="&Add",
                               Width=88, Height=22, Image="icon\add.png" },
   }
}

incomeNode = treeviewCategory.Nodes.Add("Income")
outgoNode = treeviewCategory.Nodes.Add("Outgo")
listviewEntries.Columns.Add(Gui.ColumnHeader{ Text="Date", Width=100 })
listviewEntries.Columns.Add(Gui.ColumnHeader{ Text="Detail", Width=260 })
listviewEntries.Columns.Add(Gui.ColumnHeader{ Text="Amount", Width=120 })

dialog = Gui.Form{
   Text="Add Entry", Width=320, Height=220, StartPosition="CenterParent",
               FormBorderStyle="FixedDialog", ShowInTaskbar = false;
   Gui.Label{ Text="Subject:", Width=60, Height=17, Top=14, Left=12 },
   Gui.RadioButton { Name="dialog_Income", Text="Income",
                               Width=80, Height=20, Top=9, Left=80 },
   Gui.RadioButton { Name="dialog_Outgo", Text="Outgo",
                               Width=80, Height=20, Top=9, Left=160, Checked=true },
   Gui.Label{ Text="Category:", Width=60, Height=17, Top=40, Left=12 },
   Gui.ComboBox { Name="dialog_Category", Width=160, Height=20, Top=36, Left=80 },
   Gui.Label{ Text="Detail:", Width=60, Height=17, Top=68, Left=12 },
   Gui.TextBox { Name="dialog_Detail", Width=160, Height=20, Top=64, Left=80 },
   Gui.Label{ Text="Amount:", Width=60, Height=17, Top=96, Left=12 },
   Gui.TextBox { Name="dialog_Amount", Width=128, Height=20, Top=92, Left=80 },
   Gui.Label{ Text="Date:", Width=60, Height=17, Top=128, Left=12 },
   Gui.DateTimePicker { Name="dialog_Date", Width=128,
                               Height=21, Top=124, Left=80, Format="Short" },
   Gui.Button{ Text="OK", Name="dialog_btnOK", Width=80,
                               Height=23, Top=156, Left=130, DialogResult="OK" },
   Gui.Button{ Text="Cancel", Name="dialog_btnCancel", Width=80,
                               Height=23, Top=156, Left=224, DialogResult="Cancel" },
   AcceptButton=dialog_btnOK,
   CancelButton=dialog_btnCancel
}

Entries = {}

btnAdd.Click = function (sender,e)
   dialog_Detail.Text = ""
   dialog_Amount.Text = ""
   if treeviewCategory.SelectedNode ~= nil and
                       treeviewCategory.SelectedNode.Tag ~= nil then
       dialog_Category.Text = treeviewCategory.SelectedNode.Text
   end
   if dialog.ShowDialog(form) == "OK" then
       local subject = dialog_Income.Checked and "income" or "outgo"
       local category = dialog_Category.Text
       local detail = dialog_Detail.Text
       local amount = dialog_Amount.Text
       local date = dialog_Date.Value.ToShortDateString()
       local entry = {date, subject, category, detail, amount}
       table.insert(Entries, entry)
       local categoryNode = UpdateCategoryTree(entry)
       if treeviewCategory.SelectedNode == categoryNode then
           AddEntryToListView(entry)
       else
           treeviewCategory.SelectedNode = categoryNode
       end
   end
end

function FindCategoryNode(entry)
   local subject = entry[2]
   local category = entry[3]
   local subjectNode = subject == "outgo" and outgoNode or incomeNode
   local subNodes = subjectNode.Nodes.Find(category, false)
   if #subNodes == 0 then
       return nil, subjectNode
   else
       return subNodes[1], subjectNode
   end
end

function UpdateCategoryTree(entry)
   local categoryNode, subjectNode = FindCategoryNode(entry)
   if categoryNode == nil then
       local category = entry[3]
       categoryNode = subjectNode.Nodes.Add(category, category)
       categoryNode.Tag = {}
       dialog_Category.Items.Add(category)
   end
   table.insert(categoryNode.Tag, entry)
   return categoryNode
end

treeviewCategory.AfterSelect = function (sender, e)
   local entries = treeviewCategory.SelectedNode.Tag
   if entries ~= nil then
       listviewEntries.Items.Clear()
       for _,entry in ipairs(entries) do
           AddEntryToListView(entry)
       end
   end
end

function AddEntryToListView(entry)
   local item = Gui.ListViewItem{ Text=entry[1] }
   item.SubItems.Add(entry[4])
   item.SubItems.Add(entry[5])
   item.Tag = entry
   listviewEntries.Items.Add(item)
end

function DeleteEntry()
   local item = listviewEntries.SelectedItems[1]
   local entry = item.Tag
   if entry ~= nil then
       local categoryNode = FindCategoryNode(entry)
       table.removeitem(categoryNode.Tag, entry)
       table.removeitem(Entries, entry)
       listviewEntries.Items.Remove(item)
   end
end

btnSave.Click = function (sender, e)
   local sfd = Gui.SaveFileDialog{ Title="Save data", Filter="data file(*.dat)|*.dat" }
   if sfd.ShowDialog() == "OK" then
       local file = io.open(sfd.FileName, "w")
       file:write("Entries = { ")
       for _,entry in ipairs(Entries) do
           file:write('{"', table.concat(entry, '", "'), '"}, ')
       end
       file:write('}')
       file:close()
   end
end

btnOpen.Click = function (sender, e)
   local ofd = Gui.OpenFileDialog{ Title="Open data file",
                       Filter="data file(*.dat)|*.dat" }
   if ofd.ShowDialog() == "OK" then
       dofile(ofd.FileName)
       incomeNode.Nodes.Clear()
       outgoNode.Nodes.Clear()
       dialog_Category.Items.Clear()
       for _,entry in ipairs(Entries) do
           UpdateCategoryTree(entry)
       end
       treeviewCategory.ExpandAll()
       listviewEntries.Items.Clear()
   end
end

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