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Lines beginning with E are allowed #44

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Lines beginning with E are allowed #44

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26602c7
Lines beginning with E are allowed
Malcohol Dec 17, 2020
d395481
Use parseInt instead of silly hack.
Malcohol Dec 28, 2020
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10 changes: 9 additions & 1 deletion basicode.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1376,6 +1376,7 @@ function Lexer(expr_string)
{
// start with a line break to get the parser to expect a line number
var expr_list = [new SeparatorToken("\n")];
var isAtLineStart = true
for (pos=0; pos < expr_string.length; ++pos) {
var char = expr_string[pos];
// deal with line breaks, CR, LF and CR LF all work
Expand All @@ -1385,7 +1386,12 @@ function Lexer(expr_string)
}
char = "\n";
}
if (char in SYMBOLS) {
if (isAtLineStart && isNumberChar(char))
{
var lineNumber = readInteger();
expr_list.push(new LiteralToken(parseInt(lineNumber)));
}
else if (char in SYMBOLS) {
var operator = char;
// two-symbol operators all start with lt or gt
if (char == "<" || char == ">") {
Expand Down Expand Up @@ -1430,6 +1436,7 @@ function Lexer(expr_string)
expr_list.push(new SeparatorToken(char));
console.log("Unexpected symbol `"+ char + "` during lexing");
}
isAtLineStart = (char === "\n") || (isAtLineStart && (char === " "));
}
expr_list.push(new SeparatorToken("\n"));
return expr_list;
Expand Down Expand Up @@ -1818,6 +1825,7 @@ function Parser(expr_list, program)
if (token.token_type != "literal") {
throw new BasicError("Syntax error", "expected line number, got `"+token.payload+"`", current_line);
}
//####
line_number = token.payload;
// ignore lines < 1000
if (line_number >= 1000) break;
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9 changes: 9 additions & 0 deletions test.html
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Original file line number Diff line number Diff line change
Expand Up @@ -321,5 +321,14 @@
1030 PRINT Z(9)
</script>

<script type="text/basicode">
1010E=12
1020PRINT "12 ="; E
1030E=13
1040PRINT "13 ="; E
1050 E=14
1060 PRINT "14 ="; E
</script>

</body>
</html>