Package net.hydromatic.morel.ast

Class AstWriter

java.lang.Object

net.hydromatic.morel.ast.AstWriter

public class AstWriter
extends Object

Context for writing an AST out as a string.

Field Summary

Fields

Modifier and Type	Field	Description
private final StringBuilder	b
private final boolean	parenthesize

Constructor Summary

Constructors

Modifier	Constructor	Description
	AstWriter()
private	AstWriter(StringBuilder b, boolean parenthesize)

Method Summary

Modifier and Type	Method	Description
AstWriter	append(String s)	Appends a string to the output.
AstWriter	append(AstNode node, int left, int right)	Appends a parse tree node.
AstWriter	appendAll(Iterable<? extends AstNode> nodes, int left, Op op, int right)	Appends a list of parse tree nodes.
AstWriter	appendAll(Iterable<? extends AstNode> list, String sep)	Appends a list of parse tree nodes separated by sep.
AstWriter	appendAll(Iterable<? extends AstNode> list, String start, String sep, String end)	Appends a list of parse tree nodes separated by sep, and also with prefix and suffix: start node0 sep node1 ... sep nodeN end.
AstWriter	appendAll(Iterable<? extends AstNode> list, String start, String sep, String end, String empty)	Appends a list of parse tree nodes separated by sep, and also with prefix and suffix: start node0 sep node1 ... sep nodeN end.
AstWriter	appendLiteral(Comparable value)
AstWriter	binary(String left, AstNode a0, String mid, AstNode a1, int right)	Appends a call to a binary operator (e.g.
AstWriter	binary(String left, AstNode a0, String mid, AstNode a1, String right)	Appends a call to a binary operator (e.g.
AstWriter	id(String s)	Appends an identifier to the output.
AstWriter	id(String s, int i)	Appends a ordinal-qualified-identifier to the output.
AstWriter	infix(int left, AstNode a0, Op op, AstNode a1, int right)	Appends a call to an infix operator.
AstWriter	prefix(int left, Op op, AstNode a, int right)	Appends a call to an prefix operator.
String	toString()
AstWriter	withParenthesize(boolean parenthesize)	Returns a writer that wraps everything in parentheses.

Methods inherited from class java.lang.Object

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

Field Details

b

private final StringBuilder b

parenthesize

private final boolean parenthesize

Constructor Details

AstWriter

private AstWriter(StringBuilder b,
 boolean parenthesize)

AstWriter

public AstWriter()

Method Details

toString

public String toString()

Returns the ML source code generated by this writer.

Overrides:

toString in class Object

withParenthesize

public AstWriter withParenthesize(boolean parenthesize)

Returns a writer that wraps everything in parentheses.

append

public AstWriter append(String s)

Appends a string to the output.

id

public AstWriter id(String s)

Appends an identifier to the output.

id

public AstWriter id(String s,
 int i)

Appends a ordinal-qualified-identifier to the output.

Prints "v" for id("v", 0), "v#1" for id("v", 1), and so forth.

infix

public AstWriter infix(int left,
 AstNode a0,
 Op op,
 AstNode a1,
 int right)

Appends a call to an infix operator.

prefix

public AstWriter prefix(int left,
 Op op,
 AstNode a,
 int right)

Appends a call to an prefix operator.

binary

public AstWriter binary(String left,
 AstNode a0,
 String mid,
 AstNode a1,
 int right)

Appends a call to a binary operator (e.g. "val ... = ...").

binary

public AstWriter binary(String left,
 AstNode a0,
 String mid,
 AstNode a1,
 String right)

Appends a call to a binary operator (e.g. "let ... in ... end").

append

public AstWriter append(AstNode node,
 int left,
 int right)

Appends a parse tree node.

appendAll

public AstWriter appendAll(Iterable<? extends AstNode> nodes,
 int left,
 Op op,
 int right)

Appends a list of parse tree nodes.

appendAll

public AstWriter appendAll(Iterable<? extends AstNode> list,
 String sep)

Appends a list of parse tree nodes separated by sep.

appendAll

public AstWriter appendAll(Iterable<? extends AstNode> list,
 String start,
 String sep,
 String end)

Appends a list of parse tree nodes separated by sep, and also with prefix and suffix: start node0 sep node1 ... sep nodeN end.

appendAll

public AstWriter appendAll(Iterable<? extends AstNode> list,
 String start,
 String sep,
 String end,
 String empty)

Appends a list of parse tree nodes separated by sep, and also with prefix and suffix: start node0 sep node1 ... sep nodeN end.

appendLiteral

public AstWriter appendLiteral(Comparable value)