/**
* Wrap the given expression with a logging method call. Some kinds of expressions don't like
* being wrapped in a simple fashion and so we have to handle them specially. The
* ExpressionTransformer doesn't have methods for each type so we check for each one here.
*
* <p>TODO: There are potentially other expressions which need special handling (like indexing and
* variables). This code may be working because those types have their parent being wrapped and we
* don't transform their children.
*
* @param lineNumber line number to report for this value
* @param expression the expression whose value we want to report
* @return an expression that computes the value and also reports it somewheres
*/
private Expression loggingExpression(Integer lineNumber, Expression expression) {
if (expression instanceof DeclarationExpression) {
DeclarationExpression declarationExpression = (DeclarationExpression) expression;
return new DeclarationExpression(
declarationExpression.getLeftExpression(),
declarationExpression.getOperation(),
loggingExpression(lineNumber, declarationExpression.getRightExpression()));
}
if (expression instanceof BooleanExpression) {
BooleanExpression booleanExpression = (BooleanExpression) expression;
return new BooleanExpression(
new MethodCallExpression(
new VariableExpression("this"),
"_log",
new ArgumentListExpression(
new ConstantExpression(lineNumber), booleanExpression.getExpression())));
}
return new MethodCallExpression(
new VariableExpression("this"),
"_log",
new ArgumentListExpression(new ConstantExpression(lineNumber), expression));
}
protected void addError(String msg, ASTNode expr) {
int line = expr.getLineNumber();
int col = expr.getColumnNumber();
// GRECLIPSE
int start = expr.getStart();
int end = expr.getEnd() - 1;
if (expr instanceof ClassNode) {
// assume we have a class declaration
ClassNode cn = (ClassNode) expr;
if (cn.getNameEnd() > 0) {
start = cn.getNameStart();
end = cn.getNameEnd();
} else if (cn.getComponentType() != null) {
// avoid extra whitespace after closing ]
end--;
}
} else if (expr instanceof DeclarationExpression) {
// assume that we just want to underline the variable declaration
DeclarationExpression decl = (DeclarationExpression) expr;
Expression lhs = decl.getLeftExpression();
start = lhs.getStart();
// avoid extra space before = if a variable
end =
lhs instanceof VariableExpression ? start + lhs.getText().length() - 1 : lhs.getEnd() - 1;
}
// end
SourceUnit source = getSourceUnit();
source
.getErrorCollector()
.addErrorAndContinue(
// GRECLIPSE: start
new SyntaxErrorMessage(
new PreciseSyntaxException(msg + '\n', line, col, start, end), source)
// end
);
}