Package errors

Class SyntaxError

java.lang.Object

errors.Error

errors.SyntaxError

public final class SyntaxError
extends Error

The SyntaxError class is used to represent an error that occurred during the syntax analysis stage of compilation.

Static methods for generating SyntaxErrors are stored here, each of which uses a set of pre-defined input Strings.

Since:

1.0

Nested Class Summary

Nested classes/interfaces inherited from class errors.Error

Error.ErrorMessage

Constructor Summary

Constructors

Constructor	Description
SyntaxError(SourceSpan span, java.lang.String problem, java.lang.String solution)

Method Summary

Modifier and Type	Method	Description
static SyntaxError	emptyParenthesis(SourceSpan openParenSpan, SourceSpan closeParenSpan)	Generate and return a SyntaxError for a set of empty parenthesis.
static SyntaxError	incompleteExpression(SourceSpan span)	Generate and return a SyntaxError for an incomplete expression.
static SyntaxError	invalidStatement(SourceSpan span)	Generate and return a SyntaxError for an invalid statement.
static SyntaxError	unexpectedToken(Token token, TokenType expectedType)	Generate and return a SyntaxError for an unexpected token.

Methods inherited from class errors.Error

getErrorMessage

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SyntaxError

public SyntaxError(SourceSpan span,
                   java.lang.String problem,
                   java.lang.String solution)

Method Detail

incompleteExpression

public static SyntaxError incompleteExpression(SourceSpan span)

Generate and return a SyntaxError for an incomplete expression.

Parameters:

span - The location information for where an error occurred

Returns:

A SyntaxError containing information about an error that occurred

unexpectedToken

public static SyntaxError unexpectedToken(Token token,
                                          TokenType expectedType)

Generate and return a SyntaxError for an unexpected token.

Parameters:

token - The Token which caused the error

expectedType - The TokenType that was expected

Returns:

A SyntaxError containing information about an error that occurred

invalidStatement

public static SyntaxError invalidStatement(SourceSpan span)

Generate and return a SyntaxError for an invalid statement.

Parameters:

span - The location information for where an error occurred

Returns:

A SyntaxError containing information about an error that occurred

emptyParenthesis

public static SyntaxError emptyParenthesis(SourceSpan openParenSpan,
                                           SourceSpan closeParenSpan)

Generate and return a SyntaxError for a set of empty parenthesis.

Parameters:

openParenSpan - The location information for the open parenthesis token

closeParenSpan - The location information for the close parenthesis token

Returns:

A SyntaxError containing information about an error that occurred