/////////////////////////////////////////////////////////////////////////////////////////////////////
// OBJECT
/////////////////////////////////////////////////////////////////////////////////////////////////////
public UnaryExpression(OperatorType operatorType, Expression expression, TextRange textRange) : this( textRange )
{
// Initialize parameters
this.operatorType = operatorType;
this.Expression = expression;
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
// OBJECT
/////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Initializes a new instance of the <c>IndexExpression</c> class.
/// </summary>
/// <param name="lhs">The LHS expression.</param>
/// <param name="rhs">The RHS index.</param>
/// <param name="textRange">The <see cref="TextRange"/> of the AST node.</param>
public IndexExpression(Expression lhs, IToken indexToken, LuatAstNodeBase rhs) : this(new TextRange( lhs.StartOffset, rhs.EndOffset ) ) {
// Initialize parameters
this.LHS = lhs;
this.IndexToken = indexToken;
this.RHS = rhs;
}
public IndexExpression(Expression lhs, IToken indexToken, LuatAstNodeBase rhs, TextRange textRange) : this( textRange ) {
// Initialize parameters
this.LHS = lhs;
this.IndexToken = indexToken;
this.RHS = rhs;
}
/// <summary>
/// Adds an expression to the unresolved list
/// </summary>
/// <param name="script"></param>
/// <param name="expression"></param>
/// <returns></returns>
public bool AddUnresolvedExpression(LuatScript script, Expression expression)
{
LinkedListNode<Expression> node = expression.ListNode[script];
if (node.List == script.UnresolvedExpressions)
{
return false;
}
if (null != node.List)
{
if (node.List != script.ResolvedExpressions)
{
throw new Exception("Expression is part of an unknown list");
}
node.List.Remove(node);
}
script.UnresolvedExpressions.AddFirst(node);
return true;
}
/// <summary>
/// Matches a <c>Function</c> non-terminal.
/// </summary>
/// <returns><c>true</c> if the <c>Function</c> was matched successfully; otherwise, <c>false</c>.</returns>
/// <remarks>
/// The non-terminal can start with: <c>Function</c>.
/// </remarks>
protected virtual bool MatchFunction(out Expression expression) {
expression = null;
if (!this.Match(LuatTokenId.Function))
return false;
Function function;
if (!this.MatchFunctionBody(out function))
return false;
expression = function;
return true;
}
protected bool IsFunctionCall( Expression expression )
{
return expression is FunctionCall;
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
// OBJECT
/////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Initializes a new instance of the <c>ExpressionStatement</c> class.
/// </summary>
/// <param name="owner">indicating the binary operator type.</param>
/// <param name="name">The name of the function.</param>
/// <param name="parameters">Parameters to the function.</param>
public ExpressionStatement(Expression exp) : this(new TextRange( exp.StartOffset, exp.EndOffset ) )
{
// Initialize parameters
this.Exp = exp;
}
/// <summary>
/// Matches a <c>Parenthesis</c> non-terminal.
/// </summary>
/// <returns><c>true</c> if the <c>Parenthesis</c> was matched successfully; otherwise, <c>false</c>.</returns>
/// <remarks>
/// The non-terminal can start with: <c>OpenParenthesis</c>.
/// </remarks>
protected virtual bool MatchParenthesis(out Expression expression) {
expression = null;
if (!this.Match(LuatTokenId.OpenParenthesis))
return false;
int start = this.Token.StartOffset;
if (!this.MatchExpression(out expression))
return false;
if (!this.Match(LuatTokenId.CloseParenthesis))
return false;
TextRange textRange = new TextRange( start, this.Token.EndOffset );
expression = new ParenthesizedExpression( expression, textRange );
return true;
}
/// <summary>
/// Matches a <c>Variable</c> non-terminal.
/// </summary>
/// <returns><c>true</c> if the <c>Variable</c> was matched successfully; otherwise, <c>false</c>.</returns>
/// <remarks>
/// The non-terminal can start with: <c>Identifier</c>.
/// </remarks>
protected virtual bool MatchVariable(out Expression expression) {
expression = null;
Identifier identifier;
if (!this.MatchIdentifier(out identifier))
return false;
expression = new VariableExpression( identifier );
return true;
}
/// <summary>
/// Matches a <c>ExpressionInner</c> non-terminal.
/// </summary>
/// <returns><c>true</c> if the <c>ExpressionInner</c> was matched successfully; otherwise, <c>false</c>.</returns>
/// <remarks>
/// The non-terminal can start with: <c>Function</c>, <c>OpenParenthesis</c>, <c>OpenCurlyBrace</c>, <c>Identifier</c>, <c>TripleDot</c>, <c>Nil</c>, <c>False</c>, <c>True</c>, <c>Number</c>, <c>Subtraction</c>, <c>Not</c>, <c>Hash</c>, <c>String</c>.
/// </remarks>
protected virtual bool MatchExpressionInner(out Expression expression) {
expression = null;
string description = this.GetDescription();
if (this.IsInMultiMatchSet(2, this.LookAheadToken)) {
if (!this.MatchExpressionNoFunction(out expression))
return false;
}
else if (this.TokenIs(this.LookAheadToken, LuatTokenId.Function)) {
if (!this.MatchFunction(out expression))
return false;
}
else
return false;
expression.Description = description;
return true;
}
/// <summary>
/// Matches a <c>Primary</c> non-terminal.
/// </summary>
/// <returns><c>true</c> if the <c>Primary</c> was matched successfully; otherwise, <c>false</c>.</returns>
/// <remarks>
/// The non-terminal can start with: <c>Nil</c>, <c>False</c>, <c>True</c>, <c>Number</c>, <c>String</c>.
/// </remarks>
protected virtual bool MatchPrimary(out Expression expression) {
expression = null;
if (this.TokenIs(this.LookAheadToken, LuatTokenId.Nil)) {
if (!this.Match(LuatTokenId.Nil))
return false;
expression = new NilExpression( this.Token.TextRange );
}
else if (this.TokenIs(this.LookAheadToken, LuatTokenId.False)) {
if (!this.Match(LuatTokenId.False))
return false;
expression = new BooleanExpression( false, this.Token.TextRange);
}
else if (this.TokenIs(this.LookAheadToken, LuatTokenId.True)) {
if (!this.Match(LuatTokenId.True))
return false;
expression = new BooleanExpression( true, this.Token.TextRange);
}
else if (this.TokenIs(this.LookAheadToken, LuatTokenId.Number)) {
if (!this.Match(LuatTokenId.Number))
return false;
expression = new NumberExpression( Convert.ToDouble(this.TokenText), this.Token.TextRange );
}
else if (this.TokenIs(this.LookAheadToken, LuatTokenId.String)) {
if (!this.MatchStringExpression(out expression))
return false;
}
else
return false;
return true;
}
/// <summary>
/// Matches a <c>Expression</c> non-terminal.
/// </summary>
/// <returns><c>true</c> if the <c>Expression</c> was matched successfully; otherwise, <c>false</c>.</returns>
/// <remarks>
/// The non-terminal can start with: <c>Function</c>, <c>OpenParenthesis</c>, <c>OpenCurlyBrace</c>, <c>Identifier</c>, <c>TripleDot</c>, <c>Nil</c>, <c>False</c>, <c>True</c>, <c>Number</c>, <c>Subtraction</c>, <c>Not</c>, <c>Hash</c>, <c>String</c>.
/// </remarks>
protected virtual bool MatchExpression(out Expression expression) {
expression = null;
int start = this.LookAheadToken.StartOffset;
if (!this.MatchExpressionInner(out expression)) {
expression = new IncompleteExpression( expression, new TextRange( start, this.Token.EndOffset ) );
}
return true;
}
/// <summary>
/// Matches a <c>ExpressionNoFunctionInner</c> non-terminal.
/// </summary>
/// <returns><c>true</c> if the <c>ExpressionNoFunctionInner</c> was matched successfully; otherwise, <c>false</c>.</returns>
/// <remarks>
/// The non-terminal can start with: <c>OpenParenthesis</c>, <c>OpenCurlyBrace</c>, <c>Identifier</c>, <c>TripleDot</c>, <c>Nil</c>, <c>False</c>, <c>True</c>, <c>Number</c>, <c>Subtraction</c>, <c>Not</c>, <c>Hash</c>, <c>String</c>.
/// </remarks>
protected virtual bool MatchExpressionNoFunctionInner(out Expression expression) {
expression = null;
if (this.IsInMultiMatchSet(6, this.LookAheadToken)) {
if (!this.MatchPrimary(out expression))
return false;
}
else if (this.TokenIs(this.LookAheadToken, LuatTokenId.TripleDot)) {
if (!this.Match(LuatTokenId.TripleDot))
return false;
expression = new NilExpression( this.Token.TextRange );
}
else if (((this.TokenIs(this.LookAheadToken, LuatTokenId.OpenParenthesis)) || (this.TokenIs(this.LookAheadToken, LuatTokenId.OpenCurlyBrace)) || (this.TokenIs(this.LookAheadToken, LuatTokenId.Identifier)))) {
if (this.TokenIs(this.LookAheadToken, LuatTokenId.Identifier)) {
if (!this.MatchVariable(out expression))
return false;
}
else if (this.TokenIs(this.LookAheadToken, LuatTokenId.OpenCurlyBrace)) {
if (!this.MatchTableConstructor(out expression))
return false;
}
else if (this.TokenIs(this.LookAheadToken, LuatTokenId.OpenParenthesis)) {
if (!this.MatchParenthesis(out expression))
return false;
}
else
return false;
while (this.IsInMultiMatchSet(7, this.LookAheadToken)) {
if (((this.TokenIs(this.LookAheadToken, LuatTokenId.Dot)) || (this.TokenIs(this.LookAheadToken, LuatTokenId.OpenSquareBracket)))) {
if (!this.MatchIndex(ref expression))
return false;
}
else if (this.IsInMultiMatchSet(8, this.LookAheadToken)) {
if (!this.MatchCallSuffix(ref expression))
return false;
}
else
return false;
}
}
else if (((this.TokenIs(this.LookAheadToken, LuatTokenId.Subtraction)) || (this.TokenIs(this.LookAheadToken, LuatTokenId.Not)) || (this.TokenIs(this.LookAheadToken, LuatTokenId.Hash)))) {
int start = this.LookAheadToken.StartOffset;
OperatorType operatorType;
if (!this.MatchUnaryOp(out operatorType))
return false;
Expression rhs = null;
if (!this.MatchExpression(out rhs))
return false;
expression = new UnaryExpression( operatorType, rhs, new TextRange( start, this.Token.EndOffset) );
}
else
return false;
while (this.IsInMultiMatchSet(9, this.LookAheadToken)) {
OperatorType operatorType;
if (!this.MatchBinaryOp(out operatorType))
return false;
Expression rhs = null;
if (!this.MatchExpression(out rhs))
return false;
expression = new BinaryExpression( operatorType, expression, rhs );
}
return true;
}
/// <summary>
/// Matches a <c>TableConstructor</c> non-terminal.
/// </summary>
/// <returns><c>true</c> if the <c>TableConstructor</c> was matched successfully; otherwise, <c>false</c>.</returns>
/// <remarks>
/// The non-terminal can start with: <c>OpenCurlyBrace</c>.
/// </remarks>
protected virtual bool MatchTableConstructor(out Expression expression) {
expression = null;
int start = this.LookAheadToken.StartOffset;
if (!this.Match(LuatTokenId.OpenCurlyBrace))
return false;
TableConstructor table = new TableConstructor();
if (this.IsInMultiMatchSet(4, this.LookAheadToken)) {
if (!this.MatchFieldList(table.Fields))
return false;
}
if (!this.Match(LuatTokenId.CloseCurlyBrace))
return false;
table.StartOffset = start; table.EndOffset = this.Token.EndOffset;
expression = table;
return true;
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
// OBJECT
/////////////////////////////////////////////////////////////////////////////////////////////////////
public BinaryExpression(OperatorType operatorType, Expression lhs, Expression rhs) : this( new TextRange( lhs.StartOffset, rhs.EndOffset ) )
{
// Initialize parameters
this.operatorType = operatorType;
this.LeftExpression = lhs;
this.RightExpression = rhs;
}
/// <summary>
/// Matches a <c>Index</c> non-terminal.
/// </summary>
/// <returns><c>true</c> if the <c>Index</c> was matched successfully; otherwise, <c>false</c>.</returns>
/// <remarks>
/// The non-terminal can start with: <c>Dot</c>, <c>OpenSquareBracket</c>.
/// </remarks>
protected virtual bool MatchIndex(ref Expression expression) {
LuatAstNodeBase index;
IToken indexToken;
int start = expression.StartOffset;
if (this.TokenIs(this.LookAheadToken, LuatTokenId.OpenSquareBracket)) {
if (!this.Match(LuatTokenId.OpenSquareBracket))
return false;
indexToken = this.Token;
Expression indexExpression = null;
if (!this.MatchExpression(out indexExpression))
return false;
index = indexExpression;
if (!this.Match(LuatTokenId.CloseSquareBracket))
return false;
expression.EndOffset = this.Token.EndOffset; // Expand to encompass ']'
}
else if (this.TokenIs(this.LookAheadToken, LuatTokenId.Dot)) {
if (!this.Match(LuatTokenId.Dot))
return false;
indexToken = this.Token;
Identifier indexIdentifier = null;
if (!this.MatchIdentifier(out indexIdentifier)) {
this.RaiseError( this.Token.EndOffset - 1, "Expected identifier." );
}
index = indexIdentifier;
}
else
return false;
expression = new IndexExpression( expression, indexToken, index, new TextRange( start, this.Token.EndOffset ) );
return true;
}
protected bool IsVariable( Expression expression )
{
return expression is VariableExpression ||
expression is IndexExpression;
}
/// <summary>
/// Matches a <c>StringExpression</c> non-terminal.
/// </summary>
/// <returns><c>true</c> if the <c>StringExpression</c> was matched successfully; otherwise, <c>false</c>.</returns>
/// <remarks>
/// The non-terminal can start with: <c>String</c>.
/// </remarks>
protected virtual bool MatchStringExpression(out Expression expression) {
expression = null;
if (!this.Match(LuatTokenId.String))
return false;
string text = this.TokenText;
if ( text.StartsWith("\"") ) { text = text.Substring( 1 ); }
if ( text.EndsWith("\"") ) { text = text.Substring( 0, text.Length - 1 ); }
expression = new StringExpression(text, this.Token.TextRange);
return true;
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
// OBJECT
/////////////////////////////////////////////////////////////////////////////////////////////////////
public Field(IAstNode key, Expression value, TextRange textRange) : this(textRange) {
this.Key = key;
this.Value = value;
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
// OBJECT
/////////////////////////////////////////////////////////////////////////////////////////////////////
public FunctionCall(Expression owner, Identifier name)
: this(new TextRange( owner.StartOffset, owner == null ? name.EndOffset : owner.EndOffset ) )
{
// Initialize parameters
this.Owner = owner;
this.Name = name;
}
/// <summary>
/// Matches a <c>CallSuffix</c> non-terminal.
/// </summary>
/// <returns><c>true</c> if the <c>CallSuffix</c> was matched successfully; otherwise, <c>false</c>.</returns>
/// <remarks>
/// The non-terminal can start with: <c>Colon</c>, <c>OpenParenthesis</c>, <c>OpenCurlyBrace</c>, <c>String</c>.
/// </remarks>
protected virtual bool MatchCallSuffix(ref Expression expression) {
Identifier name = null;
bool bPassesSelf = false;
if (this.TokenIs(this.LookAheadToken, LuatTokenId.Colon)) {
if (!this.Match(LuatTokenId.Colon))
return false;
bPassesSelf = true;
this.MatchIdentifier(out name);
}
FunctionCall functionCall = new FunctionCall( expression, name );
LuatAstNodeBase arguments;
this.MatchArguments(out arguments);
functionCall.Arguments = arguments;
functionCall.EndOffset = this.Token.EndOffset;
functionCall.PassesSelf = bPassesSelf;
expression = functionCall;
return true;
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
// OBJECT
/////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Initializes a new instance of the <c>ParenthesizedExpression</c> class.
/// </summary>
/// <param name="expression">The <see cref="Expression"/> affected by the checked modifier.</param>
/// <param name="textRange">The <see cref="TextRange"/> of the AST node.</param>
public ParenthesizedExpression(Expression expression, TextRange textRange) : this(textRange) {
// Initialize parameters
this.Expression = expression;
}
public UnresolvedExpression(LuatScript script, Expression expression)
{
Script = script;
Expression = expression;
}
/// <summary>
/// Matches a <c>FunctionName</c> non-terminal.
/// </summary>
/// <returns><c>true</c> if the <c>FunctionName</c> was matched successfully; otherwise, <c>false</c>.</returns>
/// <remarks>
/// The non-terminal can start with: <c>Identifier</c>.
/// </remarks>
protected virtual bool MatchFunctionName(out Expression expression, out bool expectsSelf) {
expression = null;
Identifier identifier;
IToken indexToken;
expectsSelf = false;
if (!this.MatchIdentifier(out identifier))
return false;
expression = new VariableExpression( identifier );
while (this.TokenIs(this.LookAheadToken, LuatTokenId.Dot)) {
if (!this.Match(LuatTokenId.Dot))
return false;
indexToken = this.Token;
if (!this.MatchIdentifier(out identifier))
return false;
expression = new IndexExpression( expression, indexToken, identifier );
}
if (this.TokenIs(this.LookAheadToken, LuatTokenId.Colon)) {
if (!this.Match(LuatTokenId.Colon))
return false;
indexToken = this.Token;
expectsSelf = true;
if (!this.MatchIdentifier(out identifier))
return false;
expression = new IndexExpression( expression, indexToken, identifier );
}
return true;
}