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Improve string formatting error messages

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- Print additional context to make troubleshooting easier.
- Add the placeholder where the error occurred as a prefix to the error message.
- Use sentence case for all error messages.
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Hugo Locurcio 2024-08-13 21:07:16 +02:00
parent 9e6098432a
commit 542bef343a
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GPG Key ID: 39E8F8BE30B0A49C
2 changed files with 28 additions and 28 deletions
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40
core/string/ustring.cpp
View File

@ -5618,11 +5618,11 @@ String String::sprintf(const Array &values, bool *error) const {
case 'x': // Hexadecimal (lowercase)
case 'X': { // Hexadecimal (uppercase)
if (value_index >= values.size()) {
return "not enough arguments for format string";
return vformat("[%%%c] Not enough arguments for string formatting (%d provided, but more were expected). Check for extraneous %% placeholders or missing arguments.", c, value_index);
}
if (!values[value_index].is_num()) {
return "a number is required";
return vformat("[%%%c] A number (int/float) is required, but a %s was provided.", c, Variant().get_type_name(values[value_index].get_type()));
}
int64_t value = values[value_index];
@ -5684,11 +5684,11 @@ String String::sprintf(const Array &values, bool *error) const {
}
case 'f': { // Float
if (value_index >= values.size()) {
return "not enough arguments for format string";
return vformat("[%%f] Not enough arguments for string formatting (%d provided, but more were expected). Check for extraneous %% placeholders or missing arguments.", value_index);
}
if (!values[value_index].is_num()) {
return "a number is required";
return vformat("[%%f] A number (int/float) is required, but a %s was provided.", Variant().get_type_name(values[value_index].get_type()));
}
double value = values[value_index];
@ -5729,7 +5729,7 @@ String String::sprintf(const Array &values, bool *error) const {
}
case 'v': { // Vector2/3/4/2i/3i/4i
if (value_index >= values.size()) {
return "not enough arguments for format string";
return vformat("[%%v] Not enough arguments for string formatting (%d provided, but more were expected). Check for extraneous %% placeholders or missing arguments.", value_index);
}
int count;
@ -5747,7 +5747,7 @@ String String::sprintf(const Array &values, bool *error) const {
count = 4;
} break;
default: {
return "%v requires a vector type (Vector2/3/4/2i/3i/4i)";
return vformat("[%%v]: A vector is required (Vector2/3/4/2i/3i/4i), but a %s was provided.", Variant().get_type_name(values[value_index].get_type()));
}
}
@ -5799,7 +5799,7 @@ String String::sprintf(const Array &values, bool *error) const {
}
case 's': { // String
if (value_index >= values.size()) {
return "not enough arguments for format string";
return vformat("[%%s] Not enough arguments for string formatting (%d provided, but more were expected). Check for extraneous %% placeholders or missing arguments.", value_index);
}
String str = values[value_index];
@ -5817,7 +5817,7 @@ String String::sprintf(const Array &values, bool *error) const {
}
case 'c': {
if (value_index >= values.size()) {
return "not enough arguments for format string";
return vformat("[%%c] Not enough arguments for string formatting (%d provided, but more were expected). Check for extraneous %% placeholders or missing arguments.", value_index);
}
// Convert to character.
@ -5825,20 +5825,20 @@ String String::sprintf(const Array &values, bool *error) const {
if (values[value_index].is_num()) {
int value = values[value_index];
if (value < 0) {
return "unsigned integer is lower than minimum";
return vformat("[%%c]: Unsigned integer (-0x%x) is lower than the minimum allowed value (0).", Math::abs(value));
} else if (value >= 0xd800 && value <= 0xdfff) {
return "unsigned integer is invalid Unicode character";
return vformat("[%%c]: Unsigned integer (0x%x) is an invalid Unicode character.", value);
} else if (value > 0x10ffff) {
return "unsigned integer is greater than maximum";
return vformat("[%%c]: Unsigned integer (0x%x) is greater than the maximum allowed value (0x10ffff).", value);
}
str = chr(values[value_index]);
} else if (values[value_index].get_type() == Variant::STRING) {
str = values[value_index];
if (str.length() != 1) {
return "%c requires number or single-character string";
return vformat("[%%c]: A number or a single-character string is required, but a string of %d characters was provided.", str.length());
}
} else {
return "%c requires number or single-character string";
return vformat("[%%c]: A number or a single-character string is required, but a %s was provided.", Variant().get_type_name(values[value_index].get_type()));
}
// Padding.
@ -5882,7 +5882,7 @@ String String::sprintf(const Array &values, bool *error) const {
} else {
if (c == '0' && min_chars == 0) {
if (left_justified) {
WARN_PRINT("'0' flag ignored with '-' flag in string format");
WARN_PRINT("[%%0]: The \"0\" flag is ignored with \"-\" flag in string formatting.");
} else {
pad_with_zeros = true;
}
@ -5895,7 +5895,7 @@ String String::sprintf(const Array &values, bool *error) const {
}
case '.': { // Float/Vector separator.
if (in_decimals) {
return "too many decimal points in format";
return "[%.]: Too many decimal points in format (only 1 point is allowed).";
}
in_decimals = true;
min_decimals = 0; // We want to add the value manually.
@ -5904,7 +5904,7 @@ String String::sprintf(const Array &values, bool *error) const {
case '*': { // Dynamic width, based on value.
if (value_index >= values.size()) {
return "not enough arguments for format string";
return vformat("[%%*]: Not enough arguments for string formatting (%d provided, but more were expected). Check for extraneous %% placeholders or missing arguments.", value_index);
}
Variant::Type value_type = values[value_index].get_type();
@ -5912,7 +5912,7 @@ String String::sprintf(const Array &values, bool *error) const {
value_type != Variant::VECTOR2 && value_type != Variant::VECTOR2I &&
value_type != Variant::VECTOR3 && value_type != Variant::VECTOR3I &&
value_type != Variant::VECTOR4 && value_type != Variant::VECTOR4I) {
return "* wants number or vector";
return vformat("[%%*]: A number (int/float) or a vector type (Vector2/3/4/2i/3i/4i) is required, but a %s was provided.", Variant::get_type_name(value_type));
}
int size = values[value_index];
@ -5928,7 +5928,7 @@ String String::sprintf(const Array &values, bool *error) const {
}
default: {
return "unsupported format character";
return vformat("Unsupported format character \"%%%c\".", c);
}
}
} else { // Not in format string.
@ -5950,11 +5950,11 @@ String String::sprintf(const Array &values, bool *error) const {
}
if (in_format) {
return "incomplete format";
return "Incomplete format string. Check that all % placeholders use the correct syntax and are terminated correctly.";
}
if (value_index != values.size()) {
return "not all arguments converted during string formatting";
return vformat("Not all arguments were converted during string formatting (%d provided, but %d were expected). Check for missing %% placeholders or extraneous arguments.", values.size(), value_index);
}
if (error) {

16
tests/core/string/test_string.h
View File

@ -1179,7 +1179,7 @@ TEST_CASE("[String] sprintf") {
args.push_back("cheese");
output = format.sprintf(args, &error);
REQUIRE(error);
CHECK(output == "not enough arguments for format string");
CHECK(output == "[%s] Not enough arguments for string formatting (1 provided, but more were expected). Check for extraneous % placeholders or missing arguments.");
// More arguments than formats.
format = "fish %s frog";
@ -1188,7 +1188,7 @@ TEST_CASE("[String] sprintf") {
args.push_back("cheese");
output = format.sprintf(args, &error);
REQUIRE(error);
CHECK(output == "not all arguments converted during string formatting");
CHECK(output == "Not all arguments were converted during string formatting (2 provided, but 1 were expected). Check for missing % placeholders or extraneous arguments.");
// Incomplete format.
format = "fish %10";
@ -1196,7 +1196,7 @@ TEST_CASE("[String] sprintf") {
args.push_back("cheese");
output = format.sprintf(args, &error);
REQUIRE(error);
CHECK(output == "incomplete format");
CHECK(output == "Incomplete format string. Check that all % placeholders use the correct syntax and are terminated correctly.");
// Bad character in format string.
format = "fish %&f frog";
@ -1204,7 +1204,7 @@ TEST_CASE("[String] sprintf") {
args.push_back("cheese");
output = format.sprintf(args, &error);
REQUIRE(error);
CHECK(output == "unsupported format character");
CHECK(output == "Unsupported format character \"%&\".");
// Too many decimals.
format = "fish %2.2.2f frog";
@ -1212,7 +1212,7 @@ TEST_CASE("[String] sprintf") {
args.push_back(99.99);
output = format.sprintf(args, &error);
REQUIRE(error);
CHECK(output == "too many decimal points in format");
CHECK(output == "[%.]: Too many decimal points in format (only 1 point is allowed).");
// * not a number or vector.
format = "fish %*f frog";
@ -1221,7 +1221,7 @@ TEST_CASE("[String] sprintf") {
args.push_back(99.99);
output = format.sprintf(args, &error);
REQUIRE(error);
CHECK(output == "* wants number or vector");
CHECK(output == "[%*]: A number (int/float) or a vector type (Vector2/3/4/2i/3i/4i) is required, but a String was provided.");
// Character too long.
format = "fish %c frog";
@ -1229,7 +1229,7 @@ TEST_CASE("[String] sprintf") {
args.push_back("sc");
output = format.sprintf(args, &error);
REQUIRE(error);
CHECK(output == "%c requires number or single-character string");
CHECK(output == "[%c]: A number or a single-character string is required, but a string of 2 characters was provided.");
// Character bad type.
format = "fish %c frog";
@ -1237,7 +1237,7 @@ TEST_CASE("[String] sprintf") {
args.push_back(Array());
output = format.sprintf(args, &error);
REQUIRE(error);
CHECK(output == "%c requires number or single-character string");
CHECK(output == "[%c]: A number or a single-character string is required, but a Array was provided.");
}
TEST_CASE("[String] is_numeric") {