/// <summary>
/// todo i need
/// </summary>
/// <returns></returns>
public override Token[] Parse()
{
// print no quotes needed!
var takeoverToken = _lexer.LastTokenData;
int line = _lexer.State.Line;
int pos = _lexer.State.LineCharPosition;
// What is the next word?
var marker = _lexer.ReadWord();
var m = new TokenData() { Token = marker, Line = line, LineCharPos = pos };
_lexer.Scanner.ReadChar();
_lexer.Scanner.ConsumeWhiteSpace(false, true);
Token token = null;
line = _lexer.State.Line;
pos = _lexer.State.LineCharPosition;
char c = _lexer.State.CurrentChar;
if (c == '\'' || c == '"')
token = _lexer.ReadInterpolatedString(c, false, false, true);
else
token = _lexer.ReadLine(false);
var t = new TokenData() { Token = token, Line = line, LineCharPos = pos };
_lexer.ParsedTokens.Add(takeoverToken);
_lexer.ParsedTokens.Add(m);
_lexer.ParsedTokens.Add(t);
return new Token[] { takeoverToken.Token, token };
}
/// <summary>
/// run step 123.
/// </summary>
/// <returns></returns>
public override Token[] Parse()
{
// print no quotes needed!
var takeoverToken = _lexer.LastTokenData;
int line = _lexer.State.Line;
int pos = _lexer.State.LineCharPosition;
var lineToken = _lexer.ReadLine(false);
var t = new TokenData() { Token = lineToken, Line = line, LineCharPos = pos };
_lexer.ParsedTokens.Add(takeoverToken);
_lexer.ParsedTokens.Add(t);
return new Token[] { takeoverToken.Token, lineToken };
}
/// <summary>
/// run step 123.
/// </summary>
/// <returns></returns>
public override Token[] Parse()
{
// http https ftp ftps www
var takeoverToken = _lexer.LastTokenData;
var line = _lexer.State.Line;
var pos = _lexer.State.LineCharPosition;
//var n = _lexer.ReadChar();
var token = _lexer.ReadLineRaw(false);
token = TokenBuilder.ToComment(false, token.Text);
var t = new TokenData() { Token = token, Line = line, LineCharPos = pos };
_lexer.ParsedTokens.Add(t);
return new Token[] { token };
}
/// <summary>
/// Parse the entire line.
/// </summary>
/// <param name="includeNewLine"></param>
/// <returns></returns>
protected Token[] ParseLine(bool includeNewLine)
{
// print no quotes needed!
var takeoverToken = _lexer.LastTokenData;
int line = _lexer.State.Line;
int pos = _lexer.State.LineCharPosition;
// This stops on the last char before the newline.
// So move forward one.
var lineToken = _lexer.ReadLine(false);
var t = new TokenData() { Token = lineToken, Line = line, LineCharPos = pos };
_lexer.ParsedTokens.Add(takeoverToken);
_lexer.ParsedTokens.Add(t);
return new Token[] { takeoverToken.Token, lineToken };
}
/// <summary>
/// Handles a comment token.
/// </summary>
/// <param name="tokenData"></param>
/// <param name="token"></param>
protected void HandleComment(TokenData tokenData, Token token)
{
var text = token.Text;
// Case 1: Summary tag for functions or scriptmeta tag for script info
if (text.Contains("@summary") || text.Contains(" @summary")
|| text.Contains("@scriptmeta-start") || text.Contains(" @scriptmeta-start"))
{
_hasSummaryComments = true;
_lastCommentToken = tokenData;
}
// Case 2:
else if (text.Contains("@scriptmeta-end") || text.Contains(" @scriptmeta-end"))
{
this.ClearCommentHandling();
}
if (_hasSummaryComments)
_comments.Add(token);
// Finally advance the token.
_tokenIt.Advance();
}
private List<TokenData> ReadInterpolatedTokens()
{
var c = _scanner.ReadChar();
var n = _scanner.PeekChar();
var tokens = new List<TokenData>();
while (c != '}' && !_scanner.IsAtEnd())
{
var pos = _scanner.State.Pos;
// Variable
if (_scanner.IsIdentStart(c))
{
_lastToken = ReadWord();
}
// Empty space.
else if (c == ' ' || c == '\t')
{
_lastToken = Tokens.WhiteSpace;
}
else if (_scanner.IsOp(c) == true)
{
_lastToken = ReadOperator();
}
else if (c == '(')
{
_lastToken = Tokens.LeftParenthesis;
}
else if (c == ')')
{
_lastToken = Tokens.RightParenthesis;
}
else if (c == '[')
{
_lastToken = Tokens.LeftBracket;
}
else if (c == ']')
{
_lastToken = Tokens.RightBracket;
}
else if (c == '.')
{
_lastToken = Tokens.Dot;
}
else if (c == ',')
{
_lastToken = Tokens.Comma;
}
else if (c == ':')
{
_lastToken = Tokens.Colon;
}
else if (_scanner.IsNumeric(c))
{
_lastToken = ReadNumber();
}
else if (c == '\r')
{
bool is2CharNewline = n == '\n';
IncrementLine(is2CharNewline);
}
else
{
throw new LangException("syntax", "unexpected text in string", string.Empty, _scanner.State.Line, _scanner.State.LineCharPosition);
}
var t = new TokenData() { Token = _lastToken, Line = _scanner.State.Line, LineCharPos = _scanner.State.LineCharPosition, Pos = pos };
tokens.Add(t);
// Single char symbol - char advancement was not made.
if ( (t.Token.Kind == TokenKind.Symbol || t.Token.Type == TokenTypes.WhiteSpace) && _scanner.State.Pos == pos )
_scanner.ReadChar();
c = _scanner.State.CurrentChar;
n = _scanner.PeekChar();
}
return tokens;
}
/// <summary>
/// Peeks at the next token.
/// </summary>
/// <returns></returns>
public TokenData PeekToken(bool allowSpace = false)
{
// Check if ended
if (_scanner.State.Pos >= _scanner.State.Text.Length)
{
// Store this perhaps?
if (_endTokenData != null) return _endTokenData;
// Create endToken data.
_endTokenData = new TokenData() { Token = Tokens.EndToken, Line = _scanner.State.Line, Pos = _scanner.State.Pos, LineCharPos = _scanner.State.LineCharPosition };
return _endTokenData;
}
var line = _scanner.State.Line;
var linepos = _scanner.State.LineCharPosition;
var lastToken = _lastToken;
var lastTokenData = _lastTokenData;
var iSc = _interpolatedStartChar;
var pos = _scanner.State.Pos;
// Get the next token.
var token = NextToken();
if (!allowSpace && token.Token == Tokens.WhiteSpace)
{
while (token.Token == Tokens.WhiteSpace)
{
token = NextToken();
}
}
// Reset the data back to the last token.
_scanner.State.Line = line;
_scanner.State.LineCharPosition = linepos;
_lastToken = lastToken;
_lastTokenData = lastTokenData;
_interpolatedStartChar = iSc;
_scanner.ResetPos(pos, true);
return token;
}
private void CaptureVariableReference(List<Expr> pathExps, TokenData lastPathToken, string path)
{
// Add existing path as a constant expr.
if (!string.IsNullOrEmpty(path))
AppendPathPart(pathExps, lastPathToken, path, true);
// Move past the "@"
var n = _tokenIt.Advance();
// CASE 1: "{" - Brace indicates an expression in between "{" and "}"
// e.g. @{file.name}
if (n.Token == Tokens.LeftBrace)
{
_tokenIt.Advance();
var exp = _parser.ParseExpression(null, true, true, false, false);
pathExps.Add(exp);
if (_tokenIt.NextToken.Token != Tokens.RightBrace)
throw _tokenIt.BuildSyntaxExpectedTokenException(Tokens.RightBrace);
return;
}
// CASE 2: Next token is id expression.
AppendPathPart(pathExps, n, n.Token.Text, false);
}
/// <summary>
/// run step 123.
/// </summary>
/// <returns></returns>
public override Token[] Parse()
{
// 04/20/1979
var lastToken = _lexer.LastTokenData;
var line = _lexer.State.Line;
var pos = _lexer.State.LineCharPosition;
var separator = _lexer.State.CurrentChar;
var textToken = _lexer.ReadToPosition(_endPos);
var dateText = lastToken.Token.Text + separator + textToken.Text;
dateText = dateText.Replace("-", "/");
dateText = dateText.Replace("\\", "/");
var dateToken = TokenBuilder.ToLiteralDate(dateText);
var t = new TokenData() { Token = dateToken, Line = line, LineCharPos = pos };
_lexer.ParsedTokens.Add(t);
return new Token[] { dateToken };
}
/// <summary>
/// Creates a unary expression with symbol scope, context, script refernce set.
/// </summary>
/// <param name="varname"></param>
/// <param name="sourceExpr"></param>
/// <returns></returns>
public static Expr ForEach(string varname, Expr sourceExpr, TokenData token)
{
var exp = new ForEachExpr();
exp.VarName = varname;
exp.SourceExpr = sourceExpr;
SetupContext(exp, token);
return exp;
}
/// <summary>
/// Creates a unary expression with symbol scope, context, script refernce set.
/// </summary>
/// <param name="name"></param>
/// <param name="token"></param>
/// <returns></returns>
public static Expr For(Expr start, Expr condition, Expr increment, TokenData token)
{
var exp = new ForExpr();
exp.Start = start;
exp.Condition = condition;
exp.Increment = increment;
SetupContext(exp, token);
return exp;
}
public static Expr AssignMulti(bool declare, List<AssignExpr> exprs, TokenData token)
{
var exp = new AssignMultiExpr();
exp.Assignments = exprs;
SetupContext(exp, token);
return exp;
}
/// <summary>
/// Creates a unary expression with symbol scope, context, script refernce set.
/// </summary>
/// <param name="name"></param>
/// <param name="token"></param>
/// <returns></returns>
public static Expr Assign(bool declare, Expr left, Expr right, TokenData token)
{
var exp = new AssignExpr();
exp.IsDeclaration = declare;
exp.VarExp = left;
exp.ValueExp = right;
SetupContext(exp, token);
return exp;
}
/// <summary>
/// Creates a unary expression with symbol scope, context, script refernce set.
/// </summary>
/// <param name="name"></param>
/// <param name="token"></param>
/// <returns></returns>
public static Expr Negate(Expr expr, TokenData token)
{
var exp = new NegateExpr();
exp.Expression = expr;
SetupContext(exp, token);
return exp;
}
/// <summary>
/// Creates a unary expression with symbol scope, context, script refernce set.
/// </summary>
/// <param name="name"></param>
/// <param name="token"></param>
/// <returns></returns>
public static Expr Unary(string name, Expr incExpr, double incValue, Operator op, TokenData token)
{
var exp = new UnaryExpr();
exp.Name = name;
exp.Op = op;
exp.Increment = incValue;
exp.Expression = incExpr;
SetupContext(exp, token);
return exp;
}
/// <summary>
/// Creates a variable expression with symbol scope, context, script refernce set.
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public static Expr Ident(string name, TokenData token)
{
var exp = new VariableExpr();
exp.Name = name;
SetupContext(exp, token);
return exp;
}
/// <summary>
/// run step 123.
/// </summary>
/// <returns></returns>
public override Token[] Parse()
{
// env.<ident>
// env.sys.<ident>
// env.user.<ident>
var takeoverToken = _lexer.LastTokenData;
int line = _lexer.State.Line;
int pos = _lexer.State.LineCharPosition;
// First "."
_lexer.Scanner.ReadChar();
// Read the next part.
// Case 1: variable env.path
// Case 2: sys or user env.user or env.sys
Token part = _lexer.ReadWord();
string varName = part.Text;
string scope = string.Empty;
if (string.Compare(part.Text, "sys", StringComparison.InvariantCultureIgnoreCase) == 0
|| string.Compare(part.Text, "user", StringComparison.InvariantCultureIgnoreCase) == 0)
{
// Second "."
_lexer.Scanner.ReadChar();
// "env. (sys | user )
scope = part.Text.ToLower();
// Final variable name.
part = _lexer.ReadWord();
varName = part.Text;
}
string finalText = varName;
EnvToken envToken = new EnvToken(scope, varName);
var t = new TokenData() { Token = envToken, Line = line, LineCharPos = pos };
_lexer.ParsedTokens.Add(t);
return new Token[] { envToken };
}
/// <summary>
/// Creates a unary expression with symbol scope, context, script refernce set.
/// </summary>
/// <param name="name"></param>
/// <param name="token"></param>
/// <returns></returns>
public static Expr Condition(Expr left, Operator op, Expr right, TokenData token)
{
var exp = new ConditionExpr();
exp.Left = left;
exp.Op = op;
exp.Right = right;
SetupContext(exp, token);
return exp;
}
private void AppendPathPart(List<Expr> pathExps, TokenData token, string text, bool isConstant)
{
if (string.IsNullOrEmpty(text))
text = token.Token.Text;
var start = isConstant ? Exprs.Const(new LString(text), _tokenIt.NextToken) as Expr
: Exprs.Ident(text, _tokenIt.NextToken) as Expr;
_parser.SetupContext(start, token);
pathExps.Add(start);
}
/// <summary>
/// Creates an expr that checks if the list variable supplied has any items.
/// </summary>
/// <param name="varName"></param>
/// <param name="token"></param>
/// <returns></returns>
public static Expr ListCheck(TokenData name, TokenData token)
{
var exp = new ListCheckExpr();
exp.NameExp = Ident(name.Token.Text, name);
SetupContext(exp, token);
return exp;
}
/// <summary>
/// Reads the next token from the reader.
/// </summary>
/// <returns> A token, or <c>null</c> if there are no more tokens. </returns>
public TokenData NextToken()
{
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
// LEXER ALWAYS READS NEXT CHAR
var c = _scanner.State.CurrentChar;
var n = _scanner.PeekChar();
//var tokenLengthCalcMode = TokenLengthCalcMode.Direct;
var pos = _scanner.State.Pos;
var line = _scanner.State.Line;
var tokenLength = 0;
var cpos = _scanner.State.LineCharPosition;
if (_scanner.IsEnded())
{
_lastToken = Tokens.EndToken;
}
// Empty space.
else if (c == ' ' || c == '\t')
{
_scanner.ConsumeWhiteSpace(false, true);
_lastToken = Tokens.WhiteSpace;
tokenLength = (_scanner.State.Pos - pos) + 1;
//tokenLengthCalcMode = TokenLengthCalcMode.WhiteSpace;
}
// Variable
else if (_scanner.IsIdentStart(c))
{
_lastToken = ReadWord();
}
// Single line
else if (c == '/' && n == '/')
{
_scanner.MoveChars(2);
var result = _scanner.ScanToNewLine(false, true);
//tokenLengthCalcMode = TokenLengthCalcMode.String;
tokenLength = (_scanner.State.Pos - pos) + 1;
_lastToken = TokenBuilder.ToComment(false, result.Text);
}
// Multi-line
else if (c == '/' && n == '*')
{
_scanner.MoveChars(2);
var result = _scanner.ScanUntilChars(false, '*', '/', false, true);
//tokenLengthCalcMode = TokenLengthCalcMode.MultilineComment;
tokenLength = _scanner.State.LineCharPosition;
_lastToken = TokenBuilder.ToComment(true, result.Text);
}
else if (c == '|' && n != '|')
{
_lastToken = Tokens.Pipe;
}
// Operator ( Math, Compare, Increment ) * / + -, < < > >= ! =
else if (_scanner.IsOp(c) == true)
{
_lastToken = ReadOperator();
}
else if (c == '(')
{
_lastToken = Tokens.LeftParenthesis;
}
else if (c == ')')
{
_lastToken = Tokens.RightParenthesis;
}
else if (c == '[')
{
_lastToken = Tokens.LeftBracket;
}
else if (c == ']')
{
_lastToken = Tokens.RightBracket;
}
else if (c == '.')
{
_lastToken = Tokens.Dot;
}
else if (c == ',')
{
_lastToken = Tokens.Comma;
}
else if (c == ':')
{
_lastToken = Tokens.Colon;
}
else if (c == '{')
{
_lastToken = Tokens.LeftBrace;
}
else if (c == '}')
{
_lastToken = Tokens.RightBrace;
}
else if (c == ';')
{
_lastToken = Tokens.Semicolon;
}
else if (c == '$')
{
_lastToken = Tokens.Dollar;
}
else if (c == '@')
{
_lastToken = Tokens.At;
}
else if (c == '#')
{
_lastToken = Tokens.Pound;
}
else if ( c== '?')
{
_lastToken = Tokens.Question;
}
else if (c == '\\')
{
_lastToken = Tokens.BackSlash;
}
// String literal
else if (c == '"' || c == '\'')
{
_lastToken = ReadString( c == '"');
//tokenLengthCalcMode = TokenLengthCalcMode.String;
if (_lastToken.Kind == TokenKind.Multi)
{
tokenLength = (_scanner.State.Pos - pos) -2;
string text = _scanner.State.Text.Substring(pos + 1, tokenLength);
_lastToken.SetText(text);
}
else
{
tokenLength = _lastToken.Text.Length + 2;
}
}
else if (_scanner.IsNumeric(c))
{
_lastToken = ReadNumber();
}
else if (c == '\r')
{
bool is2CharNewline = n == '\n';
IncrementLine(is2CharNewline);
}
else
{
_lastToken = Tokens.Unknown;
}
var t = new TokenData() { Token = _lastToken, Line = line, LineCharPos = cpos, Pos = pos };
_lastTokenData = t;
// Single char symbol - char advancement was not made.
if ((t.Token.Kind == TokenKind.Symbol || t.Token.Type == TokenTypes.Unknown || t.Token.Type == TokenTypes.WhiteSpace) && _scanner.State.Pos == pos)
_scanner.ReadChar();
return t;
}
/// <summary>
/// Creates a unary expression with symbol scope, context, script refernce set.
/// </summary>
/// <param name="name"></param>
/// <param name="token"></param>
/// <returns></returns>
public static Expr NamedParam(string paramName, Expr val, TokenData token)
{
var exp = new NamedParameterExpr();
exp.Name = paramName;
exp.Value = val;
SetupContext(exp, token);
return exp;
}
/// <summary>
/// Reads an interpolated string in format "${variable} some text ${othervariable + 2}."
/// </summary>
/// <param name="quote"></param>
/// <param name="readLine">Whether or not to only read to the end of the line.</param>
/// <param name="includeNewLine">Whether or not to include the new line in parsing.</param>
/// <param name="setPositionAfterToken">Whether or not set the position of lexer after the token.</param>
/// <returns></returns>
public Token ReadInterpolatedString(char quote, bool readLine = false, bool includeNewLine = false, bool setPositionAfterToken = true)
{
var allTokens = new List<TokenData>();
var interpolationCount = 0;
// Only supporting following:
// 1. id's abcd with "_"
// 2. "."
// 3. math ops ( + - / * %)
// "name" 'name' "name\"s" 'name\'"
var buffer = new StringBuilder();
var curr = _scanner.ReadChar();
var next = _scanner.PeekChar();
var matched = false;
var escapeChar = '\\';
Token token = null;
while (_scanner.State.Pos <= _scanner.LAST_POSITION)
{
// End string " or '
if (!readLine && curr == quote)
{
matched = true;
_scanner.MoveChars(1);
break;
}
// End of line.
if (readLine && ( curr == '\r' || curr == '\n' ))
{
matched = true;
if (!includeNewLine) break;
var is2CharNewLine = _scanner.ScanNewLine(curr);
var newline = is2CharNewLine ? "\r\n" : "\n";
buffer.Append(newline);
token = Tokens.NewLine;
break;
}
// Interpolation.
else if (curr == _interpolatedStartChar && next == '{')
{
// Keep track of interpolations and their start positions.
interpolationCount++;
int interpolatedStringStartPos = _scanner.State.LineCharPosition + 2;
int interpolatedStringLinePos = _scanner.State.Line;
// Add any existing text before the interpolation as a token.
if (buffer.Length > 0)
{
string text = buffer.ToString();
token = TokenBuilder.ToLiteralString(text);
var t = new TokenData() { Token = token, LineCharPos = 0, Line = _scanner.State.Line };
allTokens.Add(t);
buffer.Clear();
}
_scanner.MoveChars(1);
var tokens = ReadInterpolatedTokens();
token = TokenBuilder.ToInterpolated(string.Empty, tokens);
var iTokenData = new TokenData() { Token = token, LineCharPos = interpolatedStringStartPos, Line = interpolatedStringLinePos };
allTokens.Add(iTokenData);
}
// Not an \ for escaping so just append.
else if (curr != escapeChar)
{
buffer.Append(curr);
}
// Escape \
else if (curr == escapeChar)
{
var result = _scanner.ScanEscape(quote, false);
buffer.Append(result.Text);
_scanner.MoveChars(1);
}
curr = _scanner.ReadChar();
next = _scanner.PeekChar();
}
// Error: Unterminated string constant.
if (!matched && !readLine && _scanner.State.Pos >= _scanner.LAST_POSITION)
{
throw new LangException("Syntax Error", "Unterminated string", string.Empty, _scanner.State.Line, _scanner.State.LineCharPosition);
}
// At this point the pos is already after token.
// If matched and need to set at end of token, move back 1 char
if (matched && !setPositionAfterToken) _scanner.MoveChars(-1);
if (interpolationCount == 0)
{
var text = buffer.ToString();
return TokenBuilder.ToLiteralString(text);
}
if (buffer.Length > 0)
{
var text = buffer.ToString();
token = TokenBuilder.ToLiteralString(text);
allTokens.Add(new TokenData() { Token = token, LineCharPos = 0, Line = _scanner.State.Line });
}
return TokenBuilder.ToInterpolated(string.Empty, allTokens);
}
/// <summary>
/// Creates a function call expression.
/// </summary>
/// <param name="nameExpr"></param>
/// <param name="parameters"></param>
/// <param name="token"></param>
/// <returns></returns>
public static Expr FunctionCall(Expr nameExpr, List<Expr> parameters, TokenData token)
{
var funcExp = new FunctionCallExpr();
funcExp.NameExp = nameExpr;
funcExp.ParamListExpressions = parameters == null ? new List<Expr>() : parameters;
funcExp.ParamList = new List<object>();
SetupContext(funcExp, token);
return funcExp;
}
private void PerformDiagnostics(TokenData tokenData)
{
this.DiagnosticData.TotalTokens++;
if (tokenData.Token == Tokens.NewLine)
this.DiagnosticData.TotalNewLineTokens++;
else if (tokenData.Token == Tokens.WhiteSpace)
this.DiagnosticData.TotalWhiteSpaceTokens++;
}
public static Expr BindingCall(string bindingName, string functionName, TokenData token)
{
var bexpr = new BindingCallExpr();
bexpr.Name = functionName;
bexpr.FullName = "sys." + bindingName + "." + functionName;
bexpr.ParamListExpressions = new List<Expr>();
bexpr.ParamList = new List<object>();
return bexpr;
}
/// <summary>
/// Collects an unexpected token error and advances to next token.
/// </summary>
public void AddError(TokenData token, string error)
{
var ex = new LangException("Parse", error, this._scriptPath, token.Line, token.LineCharPos);
this._parseErrors.Add(ex);
}
/// <summary>
/// Creates a function call expression.
/// </summary>
/// <param name="nameExpr"></param>
/// <param name="parameters"></param>
/// <param name="token"></param>
/// <returns></returns>
public static Expr MemberAccess(Expr nameExpr, string memberName, bool isAssignment, TokenData token)
{
var exp = new MemberAccessExpr();
exp.IsAssignment = isAssignment;
exp.VarExp = nameExpr;
exp.MemberName = memberName;
SetupContext(exp, token);
return exp;
}
private void ClearCommentHandling()
{
// Clear the comment state.
_comments.Clear();
_hasSummaryComments = false;
_lastCommentToken = null;
}
/// <summary>
/// Sets up the context, symbol scope and script source reference for the expression supplied.
/// </summary>
/// <param name="expr"></param>
/// <param name="token"></param>
public static void SetupContext(Expr expr, TokenData token)
{
if (expr == null) return;
var reftoken = (token == null && _tokenIt != null) ? _tokenIt.NextToken : token;
expr.Ctx = _ctx;
if(expr.SymScope == null) expr.SymScope = _ctx.Symbols.Current;
if(expr.Token == null ) expr.Token = reftoken;
if(expr.Ref == null && token != null )
expr.Ref = new ScriptRef(_scriptName, reftoken.Line, reftoken.LineCharPos);
}