Laborratte5/compiler-design-excercises
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Fix semantic analysis of negative hexadecimals

Browse source
This commit is contained in:
SirYwell 2025-05-06 22:37:50 +02:00
parent 9c992efea7
commit 2edeaaaee3
No known key found for this signature in database
1 changed files with 17 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

22
src/main/java/edu/kit/kastel/vads/compiler/parser/ast/LiteralTree.java
View file

@ -14,14 +14,18 @@ public record LiteralTree(String value, int base, Span span) implements Expressi
} }
public OptionalLong parseValue() { public OptionalLong parseValue() {
int begin = 0;
int end = value.length(); int end = value.length();
if (base == 16) { return switch (base) {
begin = 2; // ignore 0x case 16 -> parseHex(end);
} case 10 -> parseDec(end);
default -> throw new IllegalArgumentException("unexpected base " + base);
};
}
private OptionalLong parseDec(int end) {
long l; long l;
try { try {
l = Long.parseLong(value, begin, end, base); l = Long.parseLong(value, 0, end, base);
} catch (NumberFormatException _) { } catch (NumberFormatException _) {
return OptionalLong.empty(); return OptionalLong.empty();
} }
@ -31,4 +35,12 @@ public record LiteralTree(String value, int base, Span span) implements Expressi
return OptionalLong.of(l); return OptionalLong.of(l);
} }
private OptionalLong parseHex(int end) {
try {
return OptionalLong.of(Integer.parseUnsignedInt(value, 2, end, 16));
} catch (NumberFormatException e) {
return OptionalLong.empty();
}
}
} }