Package tech.ixor.calclox

Class Parser

java.lang.Object

tech.ixor.calclox.Parser

public class Parser
extends Object

Builds CalcLox statements and expressions from a token stream.

Expressions are parsed according to CalcLox precedence rules, from assignment through logical, equality, comparison, arithmetic, unary, and call expressions. Loop syntax is lowered to block and while statements before interpretation.

Constructor Summary

Constructors

Constructor	Description
Parser(List<Token> tokens)	Creates a parser for a scanner-produced token stream.

Method Summary

Modifier and Type	Method	Description
List<Statement>	parse()	Parses all declarations and statements up to the EOF token.

Methods inherited from class java.lang.Object

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

Constructor Details

Parser

public Parser(List<Token> tokens)

Creates a parser for a scanner-produced token stream.

Parameters:

tokens - tokens ending in TokenType.EOF

Throws:

NullPointerException - if tokens is null

Method Details

parse

public List<Statement> parse()

Parses all declarations and statements up to the EOF token.

Returns:

statements in execution order

Throws:

CalcLoxRunnerError - if the token stream does not form a valid program