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package com.oracle.js.parser.ir;
Statement is something that becomes code and can be stepped past. A block is made up of
statements. The only node subclass that needs to keep token and location information is the
Statement
/**
* Statement is something that becomes code and can be stepped past. A block is made up of
* statements. The only node subclass that needs to keep token and location information is the
* Statement
*/
public abstract class Statement extends Node implements Terminal {
private final int lineNumber;
Constructor
Params: - lineNumber – line number
- token – token
- finish – finish
/**
* Constructor
*
* @param lineNumber line number
* @param token token
* @param finish finish
*/
public Statement(final int lineNumber, final long token, final int finish) {
super(token, finish);
this.lineNumber = lineNumber;
}
Constructor
Params: - lineNumber – line number
- token – token
- start – start
- finish – finish
/**
* Constructor
*
* @param lineNumber line number
* @param token token
* @param start start
* @param finish finish
*/
public Statement(final int lineNumber, final long token, final int start, final int finish) {
super(token, start, finish);
this.lineNumber = lineNumber;
}
Copy constructor
Params: - node – source node
/**
* Copy constructor
*
* @param node source node
*/
protected Statement(final Statement node) {
super(node);
this.lineNumber = node.lineNumber;
}
Return the line number
Returns: line number
/**
* Return the line number
*
* @return line number
*/
public int getLineNumber() {
return lineNumber;
}
Is this a terminal statement, i.e. does it end control flow like a throw or return?
Returns: true if this node statement is terminal
/**
* Is this a terminal statement, i.e. does it end control flow like a throw or return?
*
* @return true if this node statement is terminal
*/
@Override
public boolean isTerminal() {
return false;
}
Check if this statement repositions control flow with goto like semantics, for example BreakNode
or a ForNode
with no test Returns: true if statement has goto semantics
/**
* Check if this statement repositions control flow with goto like semantics, for example
* {@link BreakNode} or a {@link ForNode} with no test
*
* @return true if statement has goto semantics
*/
public boolean hasGoto() {
return false;
}
Check if this statement has terminal flags, i.e. ends or breaks control flow
Returns: true if has terminal flags
/**
* Check if this statement has terminal flags, i.e. ends or breaks control flow
*
* @return true if has terminal flags
*/
public final boolean hasTerminalFlags() {
return isTerminal() || hasGoto();
}
Returns: true if the completion value of this statement is never the value empty
/**
* @return true if the completion value of this statement is never the value {@code empty}
*/
public boolean isCompletionValueNeverEmpty() {
return false;
}
}