Package com.tonic.analysis.source.parser

Class Parser

java.lang.Object

com.tonic.analysis.source.parser.Parser

public class Parser
extends Object

Recursive-descent parser over a Lexer token stream, tracking a scope stack so declared variable types are known while parsing expressions.

Constructor Summary

Constructors

Constructor	Description
Parser(Lexer lexer, String source)	Creates a parser that throws on the first parse error.
Parser(Lexer lexer, String source, ParseErrorListener errorListener)	Creates a parser and reads the first token.

Method Summary

Modifier and Type	Method	Description
CompilationUnit	parseCompilationUnit()	Parses a whole file: optional package declaration, imports, then type declarations.
Expression	parseExpression()	Parses a single expression, assignment included.
Statement	parseStatement()	Parses a single statement.
SourceType	parseType()	Parses a type reference, including array and generic forms.

Methods inherited from class java.lang.Object

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

Constructor Detail

Parser

public Parser(Lexer lexer,
              String source,
              ParseErrorListener errorListener)

Creates a parser and reads the first token.

Parameters:

lexer - supplies the token stream

source - the text the tokens came from, used for error context

errorListener - where parse errors are reported; defaults to rethrowing when null

Throws:

ParseException - if the listener rethrows and the first token cannot be read

Parser

public Parser(Lexer lexer,
              String source)

Creates a parser that throws on the first parse error.

Parameters:

lexer - supplies the token stream

source - the text the tokens came from, used for error context

Throws:

ParseException - if the first token cannot be read

Method Detail

parseCompilationUnit

public CompilationUnit parseCompilationUnit()

Parses a whole file: optional package declaration, imports, then type declarations.

Returns:

the compilation unit

Throws:

ParseException - if the input does not parse and the error listener rethrows

parseExpression

public Expression parseExpression()

Parses a single expression, assignment included.

Returns:

the expression

Throws:

ParseException - if the input does not parse and the error listener rethrows

parseStatement

public Statement parseStatement()

Parses a single statement.

Returns:

the statement

Throws:

ParseException - if the input does not parse and the error listener rethrows

parseType

public SourceType parseType()

Parses a type reference, including array and generic forms.

Returns:

the type

Throws:

ParseException - if the input does not parse and the error listener rethrows