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java: comment changes

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* data/skeletons/lalr1.java, examples/java/calc/Calc.y: here.
This commit is contained in:
Akim Demaille
2020-04-30 08:34:15 +02:00
parent 0c0e778bd1
commit 0407acbc59
2 changed files with 30 additions and 12 deletions
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25
examples/java/calc/Calc.y
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@@ -113,6 +113,9 @@ class CalcLexer implements Calc.Lexer {
return new Position(end);
}
/**
* Build and emit a syntax error message.
*/
public void reportSyntaxError(Calc.Context ctx) {
System.err.print(ctx.getLocation() + ": syntax error");
{
@@ -131,11 +134,18 @@ class CalcLexer implements Calc.Lexer {
System.err.println("");
}
public void yyerror(Calc.Location l, String s) {
if (l == null)
System.err.println(s);
/**
* Emit an error referring to the given location in a user-defined way.
*
* @@param loc The location of the element to which the
* error message is related.
* @@param msg The string for the error message.
*/
public void yyerror(Calc.Location loc, String msg) {
if (loc == null)
System.err.println(msg);
else
System.err.println(l + ": " + s);
System.err.println(loc + ": " + msg);
}
Integer yylval;
@@ -185,7 +195,9 @@ class CalcLexer implements Calc.Lexer {
}
}
/**
* A class defining a point in the input.
*/
class Position {
public int line = 1;
public int column = 1;
@@ -227,6 +239,9 @@ class Position {
}
}
/**
* A Stream reader that keeps track of the current Position.
*/
class PositionReader extends BufferedReader {
private Position position = new Position();