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Make line numbers relevant; resolves issue #5

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Joshua Bell
2014-12-28 20:55:23 -07:00
parent cef9261ca2
commit f55aa51023
3 changed files with 45 additions and 14 deletions
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38
basic.js
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@@ -2132,24 +2132,48 @@ this.basic = (function() {
function parseStatement() {
if (test('data')) {
program.data = program.data.concat(match('data'));
return;
return undefined;
} else if (test('remark', void 0, true)) {
return;
return undefined;
} else if (test('reserved') || test('identifier')) {
program.statements.push(mkfun(parseCommand()));
return mkfun(parseCommand());
} else {
// So TRACE output is correct
program.statements.push(empty_statement);
return empty_statement;
}
}
// Line = line-number Statement { separator Statement }
function parseLine() {
program.statements.push(match('lineNumber'));
parseStatement();
var num = match('lineNumber');
var statements = [];
var statement = parseStatement();
if (statement) statements.push(statement);
while (test('separator', ':', true)) {
parseStatement();
statement = parseStatement();
if (statement) statements.push(statement);
}
insertLine(num, statements);
}
function insertLine(number, statements) {
var remove = 0;
for (var i = 0, len = program.statements.length; i < len; ++i) {
if (typeof program.statements[i] !== 'number')
continue;
if (program.statements[i] < number)
continue;
if (program.statements[i] === number) {
var n = i;
do {
++n;
++remove;
} while (n < len && typeof program.statements[n] !== 'number');
}
break;
}
var args = [i, remove, number].concat(statements);
program.statements.splice.apply(program.statements, args);
}
// Program = Line { Line }