/**
* Generate a pretty-printed description of this abstract syntax node using the concrete syntax of
* the mini programming language.
*/
public void print(TextOutput out, int n) {
out.indent(n);
out.println("{");
this.printBlock(out, n + 1);
out.indent(n);
out.println("}");
}
/**
* Print this statement as the "ifTrue" branch of an if-then-else having just printed the
* parenthesized test, but no newline. This allows us to override the behaviour for Blocks to
* match the desired output formatting. The elseStmt parameter specifies the corresponding else
* statement that should also be printed. For current purposes, there are no if-then-else
* statements that do not have an else branch.
*/
public void printThenElse(TextOutput out, int n, Stmt elseStmt) {
out.println(" {");
printBlock(out, n + 1);
out.indent(n);
out.print("} else");
elseStmt.printElse(out, n);
}
/**
* Print out a program. In general, we expect a top-level program to be represented by a Block,
* whose contents will be displayed here without the enclosing braces that might otherwise be
* expected. We will also define an implementation of this method for arbitrary Stmt values too so
* that it can be used for debugging and testing.
*/
public void printProgram(TextOutput out) {
printBlock(out, 0);
out.println();
}
/**
* Print this statement as the "ifFalse" branch of an if-then-else having just printed the "else"
* keyword but no newline. Again, this allows us to override the behavior for Blocks.
*/
public void printElse(TextOutput out, int n) {
out.println();
print(out, n + 1);
}
