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Corrected hex double literal parsing (although it's not 100% correct yet)

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This commit is contained in:
Christoffer Lerno
2021-07-12 23:45:34 +02:00
parent a28502a6af
commit 9a6d8d7657
2 changed files with 30 additions and 0 deletions
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17
src/compiler/lexer.c
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@@ -397,6 +397,23 @@ static inline bool scan_hex(Lexer *lexer)
while (is_digit(peek(lexer))) next(lexer);
}
if (prev(lexer) == '_') return add_error_token(lexer, "The number ended with '_', but that character needs to be between, not after, digits.");
if (is_float)
{
// IMPROVE
// For the float we actually parse things, using strtold
// this is not ideal, we should try to use f128 if possible for example.
// Possibly we should move to a BigDecimal implementation or at least a soft float 256
// implementation for the constants.
char *end = NULL;
long double fval = strtold(lexer->lexing_start, &end);
if (end != lexer->current)
{
return add_error_token(lexer, "Invalid float value.");
}
add_generic_token(lexer, TOKEN_REAL);
lexer->latest_token_data->value = fval;
return true;
}
return add_token(lexer, is_float ? TOKEN_REAL : TOKEN_INTEGER, lexer->lexing_start);
}

13
test/test_suite/expressions/parsed_numbers.c3t Normal file
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@@ -0,0 +1,13 @@
module numbers;
double a = 0x1.1p+1;
double b = -12.3e-12;
double c = 0x1.1p-1;
double d = 12.3e+12;
// #expect: numbers.ll
@numbers.a = global double 2.125000e+00, align 8
@numbers.b = global double -1.230000e-11, align 8
@numbers.c = global double 5.312500e-01, align 8
@numbers.d = global double 1.230000e+13, align 8