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cgen: string interpolation field width support for large integers and utf8 strings

pull/4678/head
Uwe Krüger 2020-05-02 00:43:59 +02:00 committed by GitHub
parent 2f64594ce0
commit 170ee4312f
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GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 290 additions and 138 deletions
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8
doc/docs.md
View File

@ -215,6 +215,14 @@ Both single and double quotes can be used to denote strings. For consistency,
Interpolation syntax is pretty simple. It also works with fields:
`'age = $user.age'`. If you need more complex expressions, use `${}`: `'can register = ${user.age > 13}'`.
Format specifiers similar to those in C's `printf()` are supported, too. `f`, `g`, `x`, etc. are optional
and specify the output format. The compiler takes care of the storage size, so there is no `hd` or `llu`.
```v
println('x = ${x:12.3f}'`
println('${item:-20} ${n:20d})
```
All operators in V must have values of the same type on both sides. This code will not compile if `age` is an `int`:
```v

2
vlib/benchmark/benchmark.v
View File

@ -218,7 +218,7 @@ pub fn (b &Benchmark) total_duration() i64 {
// //////////////////////////////////////////////////////////////////
fn (b &Benchmark) tdiff_in_ms(s string, tdiff i64) string {
if b.verbose {
return '${tdiff/1000.0:9.3f} ms $s'
return '${f64(tdiff)/1000.0:9.3f} ms $s'
}
return s
}

15
vlib/builtin/utf8.v
View File

@ -174,6 +174,21 @@ fn utf8_len(c byte) int {
return b
}
// Calculate string length for formatting, i.e. number of "characters"
fn utf8_str_len(s string) int {
mut l := 0
for i := 0; i < s.len; i++ {
l++
c := s.str[i]
if (c & (1 << 7)) != 0 {
for t := byte(1 << 6); (c & t) != 0; t >>= 1 {
i++
}
}
}
return l
}
// Reads an utf8 character from standard input
pub fn utf8_getchar() int {
c := C.getchar()

4
vlib/v/checker/checker.v
View File

@ -2023,13 +2023,13 @@ pub fn (mut c Checker) map_init(node mut ast.MapInit) table.Type {
if !c.table.check(key_type, key0_type) {
key0_type_sym := c.table.get_type_symbol(key0_type)
key_type_sym := c.table.get_type_symbol(key_type)
c.error('map init: cannot use `$key_type_sym.name` as `$key0_type_sym` for map key',
c.error('map init: cannot use `$key_type_sym.name` as `$key0_type_sym.name` for map key',
node.pos)
}
if !c.table.check(val_type, val0_type) {
val0_type_sym := c.table.get_type_symbol(val0_type)
val_type_sym := c.table.get_type_symbol(val_type)
c.error('map init: cannot use `$val_type_sym.name` as `$val0_type_sym` for map value',
c.error('map init: cannot use `$val_type_sym.name` as `$val0_type_sym.name` for map value',
node.pos)
}
}

352
vlib/v/gen/cgen.v
View File

@ -4,6 +4,7 @@
module gen
import strings
import strconv
import v.ast
import v.table
import v.pref
@ -211,7 +212,8 @@ pub fn (mut g Gen) init() {
g.cheaders.writeln('#include <inttypes.h>') // int64_t etc
g.cheaders.writeln(c_builtin_types)
g.cheaders.writeln(c_headers)
g.definitions.writeln('\nstring _STR(const char*, ...);\n')
g.definitions.writeln('\nvoid _STR_PRINT_ARG(const char*, char**, int*, int*, int, ...);\n')
g.definitions.writeln('\nstring _STR(const char*, int, ...);\n')
g.definitions.writeln('\nstring _STR_TMP(const char*, ...);\n')
g.write_builtin_types()
g.write_typedef_types()
@ -2173,15 +2175,76 @@ fn (mut g Gen) write_init_function() {
fn (mut g Gen) write_str_fn_definitions() {
// _STR function can't be defined in vlib
g.writeln('
string _STR(const char *fmt, ...) {
void _STR_PRINT_ARG(const char *fmt, char** refbufp, int *nbytes, int *memsize, int guess, ...) {
va_list args;
va_start(args, guess);
for(;;) {
if (guess < *memsize - *nbytes) {
guess = vsnprintf(*refbufp + *nbytes, *memsize - *nbytes, fmt, args);
if (guess < *memsize - *nbytes) { // result did fit into buffer
*nbytes += guess;
return;
}
}
// increase buffer (somewhat exponentially)
*memsize += (*memsize + *memsize) / 3 + guess;
*refbufp = realloc(*refbufp, *memsize);
}
}
string _STR(const char *fmt, int nfmts, ...) {
va_list argptr;
va_start(argptr, fmt);
size_t len = vsnprintf(0, 0, fmt, argptr) + 1;
va_end(argptr);
byte* buf = malloc(len);
va_start(argptr, fmt);
vsprintf((char *)buf, fmt, argptr);
int memsize = 128;
int nbytes = 0;
char* buf = malloc(memsize);
va_start(argptr, nfmts);
for (int i=0; i<nfmts; i++) {
int k = strlen(fmt);
bool is_fspec = false;
for (int j=0; j<k; j++) {
if (fmt[j] == '+"'%'"+') {
j++;
if(fmt[j] != '+"'%'"+') {
is_fspec = true;
break;
}
}
}
if (is_fspec) {
char f = fmt[k-1];
char fup = f & 0xdf; // toupper
bool l = fmt[k-2] == '+"'l'"+';
bool ll = l && fmt[k-3] == '+"'l'"+';
if (f == '+"'u'"+' || fup == '+"'X'"+' || f == '+"'o'"+' || f == '+"'d'"+' || f == '+"'c'"+') { // int...
if (ll) _STR_PRINT_ARG(fmt, &buf, &nbytes, &memsize, k+16, va_arg(argptr, long long));
else if (l) _STR_PRINT_ARG(fmt, &buf, &nbytes, &memsize, k+10, va_arg(argptr, long));
else _STR_PRINT_ARG(fmt, &buf, &nbytes, &memsize, k+8, va_arg(argptr, int));
} else if (fup >= '+"'E'"+' && fup <= '+"'G'"+') { // floating point
_STR_PRINT_ARG(fmt, &buf, &nbytes, &memsize, k+10, va_arg(argptr, double));
} else if (f == '+"'s'"+') { // v string
string s = va_arg(argptr, string);
if (fmt[k-4] == '+"'*'"+') { // %*.*s
int fwidth = va_arg(argptr, int);
if (fwidth < 0)
fwidth -= (s.len - utf8_str_len(s));
else
fwidth += (s.len - utf8_str_len(s));
_STR_PRINT_ARG(fmt, &buf, &nbytes, &memsize, k+fwidth-4, fwidth, s.len, s.str);
} else { // %.*s
_STR_PRINT_ARG(fmt, &buf, &nbytes, &memsize, k+s.len-4, s.len, s.str);
}
} else {
v_panic(tos3("Invaid format specifier"));
}
} else {
if (k)
_STR_PRINT_ARG(fmt, &buf, &nbytes, &memsize, k);
}
fmt += k+1;
}
va_end(argptr);
buf[nbytes] = 0;
buf = realloc(buf, nbytes+1);
#ifdef DEBUG_ALLOC
puts("_STR:");
puts(buf);
@ -2362,89 +2425,128 @@ fn (g Gen) sort_structs(typesa []table.TypeSymbol) []table.TypeSymbol {
fn (mut g Gen) string_inter_literal(node ast.StringInterLiteral) {
g.write('_STR("')
// Build the string with %
mut fieldwidths := []int{}
mut specs := []byte{}
mut num_fmts := 1
for i, val in node.vals {
escaped_val := val.replace_each(['"', '\\"', '\r\n', '\\n', '\n', '\\n', '%', '%%'])
g.write(escaped_val)
if i >= node.exprs.len {
fieldwidths << 0
specs << `_`
continue
}
// TODO: fix match, sum type false positive
// match node.expr_types[i] {
// table.string_type {
// g.write('%.*s')
// }
// table.int_type {
// g.write('%d')
// }
// else {}
// }
num_fmts++
sym := g.table.get_type_symbol(node.expr_types[i])
sfmt := node.expr_fmts[i]
mut fspec := `_` // placeholder
mut fmt := '' // field width and precision
if sfmt.len > 0 {
fspec := sfmt[sfmt.len - 1]
if fspec == `s` && node.expr_types[i] != table.string_type {
verror('only V strings can be formatted with a ${sfmt} format')
// analyze and validate format specifier
if sfmt[sfmt.len - 1] in [`E`, `F`, `G`, `e`, `f`, `g`, `e`,
`d`, `u`, `x`, `X`, `o`, `c`, `s`] {
fspec = sfmt[sfmt.len - 1]
}
g.write('%' + sfmt[1..])
} else if node.expr_types[i] in [table.string_type, table.bool_type] || sym.kind in
[.enum_, .array, .array_fixed] {
g.write('%.*s')
} else if node.expr_types[i] in [table.f32_type, table.f64_type] {
g.write('%g')
} else if sym.kind in [.struct_, .map] && !sym.has_method('str') {
g.write('%.*s')
} else if node.expr_types[i] == table.i16_type {
g.write('%"PRId16"')
} else if node.expr_types[i] == table.u16_type {
g.write('%"PRIu16"')
} else if node.expr_types[i] == table.u32_type {
g.write('%"PRIu32"')
} else if node.expr_types[i] == table.i64_type {
g.write('%"PRId64"')
} else if node.expr_types[i] == table.u64_type {
g.write('%"PRIu64"')
} else if g.typ(node.expr_types[i]).starts_with('Option') {
g.write('%.*s')
fmt = if fspec == `_` {
sfmt[1..sfmt.len]
} else {
g.write('%"PRId32"')
sfmt[1..sfmt.len - 1]
}
}
g.write('", ')
if fspec == `_` { // set default representation for type if still missing
if node.expr_types[i].is_float() {
fspec = `g`
} else if node.expr_types[i].is_signed() {
fspec = `d`
} else if node.expr_types[i].is_unsigned() {
fspec = `u`
} else if node.expr_types[i] in [table.string_type, table.bool_type] ||
sym.kind in [.enum_, .array, .array_fixed, .struct_, .map] ||
g.typ(node.expr_types[i]).starts_with('Option') ||
sym.has_method('str') {
fspec = `s`
} else {
// default to int - TODO: should better be checked
fspec = `d`
}
}
fields := fmt.split('.')
// validate format
// only floats should have precision specifier
if fields.len > 2 || fields.len == 2 && !(node.expr_types[i].is_float()) ||
node.expr_types[i].is_signed() && !(fspec in [`d`, `c`, `x`, `X`, `o`]) ||
node.expr_types[i].is_unsigned() && !(fspec in [`u`, `x`, `X`, `o`, `c`]) ||
node.expr_types[i].is_float() && !(fspec in [`E`, `F`, `G`, `e`, `f`, `g`, `e`]) {
verror('illegal format specifier ${fspec:c} for type ${g.table.get_type_name(node.expr_types[i])}')
}
// make sure that format paramters are valid numbers
for j, f in fields {
for k, c in f {
if (c < `0` || c > `9`) &&
!(j == 0 && k == 0 && (node.expr_types[i].is_number() && c == `+` || c == `-`)) {
verror('illegal character ${c:c} in format specifier ${fmt}')
}
}
}
specs << fspec
fieldwidths << if fields.len == 0 {
0
} else {
strconv.atoi(fields[0])
}
// write correct format specifier to intermediate string
g.write('%')
if fspec == `s` {
if fields.len == 0 || strconv.atoi(fields[0]) == 0 {
g.write('.*s')
} else {
g.write('*.*s')
}
} else if node.expr_types[i].is_float() {
g.write('$fmt${fspec:c}')
} else if node.expr_types[i].is_int() {
if fspec == `c` {
if node.expr_types[i].idx() in [table.i64_type_idx table.f64_type_idx] {
verror("64 bit integer types cannot be interpolated as character")
} else {
g.write('${fmt}c')
}
} else {
g.write('${fmt}"PRI${fspec:c}')
if node.expr_types[i] in [table.i8_type, table.byte_type] {
g.write('8')
} else if node.expr_types[i] in [table.i16_type, table.u16_type] {
g.write('16')
} else if node.expr_types[i] in [table.i64_type, table.u64_type] {
g.write('64')
} else {
g.write('32')
}
g.write('"')
}
} else {
// TODO: better check this case
g.write('${fmt}"PRId32"')
}
g.write('\\000')
}
g.write('", $num_fmts, ')
// Build args
for i, expr in node.exprs {
sfmt := node.expr_fmts[i]
if sfmt.len > 0 {
fspec := sfmt[sfmt.len - 1]
if fspec == `s` && node.expr_types[i] == table.string_type {
if node.expr_types[i] == table.string_type {
g.expr(expr)
g.write('.str')
} else {
g.expr(expr)
}
} else if node.expr_types[i] == table.string_type {
// `name.str, name.len,`
g.expr(expr)
g.write('.len, ')
g.expr(expr)
g.write('.str')
} else if node.expr_types[i] == table.bool_type {
g.expr(expr)
g.write(' ? 4 : 5, ')
g.write(' ? _SLIT("true") : _SLIT("false")')
} else if node.expr_types[i].is_number() || specs[i] == `d` {
g.expr(expr)
g.write(' ? "true" : "false"')
} else if node.expr_types[i] in [table.f32_type, table.f64_type] {
g.expr(expr)
} else {
} else if specs[i] == `s` {
sym := g.table.get_type_symbol(node.expr_types[i])
if node.expr_types[i].flag_is(.variadic) {
str_fn_name := g.gen_str_for_type(node.expr_types[i])
g.write('${str_fn_name}(')
g.expr(expr)
g.write(')')
g.write('.len, ')
g.write('${str_fn_name}(')
g.expr(expr)
g.write(').str')
} else if sym.kind == .enum_ {
is_var := match node.exprs[i] {
ast.SelectorExpr { true }
@ -2456,58 +2558,51 @@ fn (mut g Gen) string_inter_literal(node ast.StringInterLiteral) {
g.write('${str_fn_name}(')
g.enum_expr(expr)
g.write(')')
g.write('.len, ')
g.write('${str_fn_name}(')
g.enum_expr(expr)
g.write(').str')
} else {
g.write('tos3("')
g.enum_expr(expr)
g.write('")')
g.write('.len, ')
g.write('"')
g.enum_expr(expr)
g.write('"')
}
} else if sym.kind in [.array, .array_fixed] {
str_fn_name := g.gen_str_for_type(node.expr_types[i])
g.write('${str_fn_name}(')
g.expr(expr)
g.write(')')
g.write('.len, ')
g.write('${str_fn_name}(')
g.expr(expr)
g.write(').str')
} else if sym.kind == .map && !sym.has_method('str') {
str_fn_name := g.gen_str_for_type(node.expr_types[i])
g.write('${str_fn_name}(')
g.expr(expr)
g.write(')')
g.write('.len, ')
g.write('${str_fn_name}(')
g.expr(expr)
g.write(').str')
} else if sym.kind == .struct_ && !sym.has_method('str') {
str_fn_name := g.gen_str_for_type(node.expr_types[i])
} else if sym.has_method('str') || sym.kind in [.array, .array_fixed, .map, .struct_] {
is_p := node.expr_types[i].is_ptr()
val_type := if is_p {
node.expr_types[i].deref()
} else {
node.expr_types[i]
}
str_fn_name := g.gen_str_for_type(val_type)
if is_p {
g.write('string_add(_SLIT("&"), ${str_fn_name}(*(')
} else {
g.write('${str_fn_name}(')
}
g.expr(expr)
if sym.kind == .struct_ && !sym.has_method('str') {
if is_p {
g.write('),0))')
} else {
g.write(',0)')
g.write('.len, ')
g.write('${str_fn_name}(')
g.expr(expr)
g.write(',0).str')
}
} else {
if is_p {
g.write(')))')
} else {
g.write(')')
}
}
} else if g.typ(node.expr_types[i]).starts_with('Option') {
str_fn_name := 'Option_str'
g.write('${str_fn_name}(*(Option*)&')
g.expr(expr)
g.write(')')
g.write('.len, ')
g.write('${str_fn_name}(*(Option*)&')
g.expr(expr)
g.write(').str')
} else {
verror('cannot convert to string')
}
} else {
g.expr(expr)
}
if specs[i] == `s` && fieldwidths[i] != 0 {
g.write(', ${fieldwidths[i]}')
}
if i < node.exprs.len - 1 {
g.write(', ')
@ -3191,9 +3286,9 @@ fn (mut g Gen) gen_str_for_struct(info table.Struct, styp, str_fn_name string) {
g.auto_str_funcs.writeln('\treturn _STR("${clean_struct_v_type_name} {\\n"')
for field in info.fields {
fmt := g.type_to_fmt(field.typ)
g.auto_str_funcs.writeln('\t\t"%.*s ' + '$field.name: $fmt\\n"')
g.auto_str_funcs.writeln('\t\t"%.*s\\000 ' + '$field.name: $fmt\\n"')
}
g.auto_str_funcs.write('\t\t"%.*s}"')
g.auto_str_funcs.write('\t\t"%.*s\\000}", ${2*(info.fields.len+1)}')
if info.fields.len > 0 {
g.auto_str_funcs.write(',\n\t\t')
for i, field in info.fields {
@ -3203,23 +3298,18 @@ fn (mut g Gen) gen_str_for_struct(info table.Struct, styp, str_fn_name string) {
field_styp := g.typ(field.typ)
field_styp_fn_name := if has_custom_str { '${field_styp}_str' } else { fnames2strfunc[field_styp] }
if sym.kind == .enum_ {
g.auto_str_funcs.write('indents.len, indents.str, ')
g.auto_str_funcs.write('${field_styp_fn_name}( it->${field.name} ).len, ')
g.auto_str_funcs.write('${field_styp_fn_name}( it->${field.name} ).str ')
g.auto_str_funcs.write('indents, ')
g.auto_str_funcs.write('${field_styp_fn_name}( it->${field.name} ) ')
} else if sym.kind == .struct_ {
g.auto_str_funcs.write('indents.len, indents.str, ')
g.auto_str_funcs.write('${field_styp_fn_name}( it->${field.name}${second_str_param} ).len, ')
g.auto_str_funcs.write('${field_styp_fn_name}( it->${field.name}${second_str_param} ).str ')
g.auto_str_funcs.write('indents, ')
g.auto_str_funcs.write('${field_styp_fn_name}( it->${field.name}${second_str_param} ) ')
} else if sym.kind in [.array, .array_fixed] {
g.auto_str_funcs.write('indents.len, indents.str, ')
g.auto_str_funcs.write('${field_styp_fn_name}( it->${field.name}).len, ')
g.auto_str_funcs.write('${field_styp_fn_name}( it->${field.name}).str ')
g.auto_str_funcs.write('indents, ')
g.auto_str_funcs.write('${field_styp_fn_name}( it->${field.name}) ')
} else {
g.auto_str_funcs.write('indents.len, indents.str, it->${field.name}')
if field.typ == table.string_type {
g.auto_str_funcs.write('.len, it->${field.name}.str')
} else if field.typ == table.bool_type {
g.auto_str_funcs.write(' ? 4 : 5, it->${field.name} ? "true" : "false"')
g.auto_str_funcs.write('indents, it->${field.name}')
if field.typ == table.bool_type {
g.auto_str_funcs.write(' ? _SLIT("true") : _SLIT("false")')
}
}
if i < info.fields.len - 1 {
@ -3228,7 +3318,7 @@ fn (mut g Gen) gen_str_for_struct(info table.Struct, styp, str_fn_name string) {
}
}
g.auto_str_funcs.writeln(',')
g.auto_str_funcs.writeln('\t\tindents.len, indents.str);')
g.auto_str_funcs.writeln('\t\tindents);')
g.auto_str_funcs.writeln('}')
}
@ -3247,7 +3337,7 @@ fn (mut g Gen) gen_str_for_array(info table.Array, styp, str_fn_name string) {
if sym.kind == .struct_ && !sym.has_method('str') {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, ${field_styp}_str(it,0));')
} else if sym.kind in [.f32, .f64] {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, _STR("%g", it));')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, _STR("%g", 1, it));')
} else {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, ${field_styp}_str(it));')
}
@ -3274,9 +3364,9 @@ fn (mut g Gen) gen_str_for_array_fixed(info table.ArrayFixed, styp, str_fn_name
if sym.kind == .struct_ && !sym.has_method('str') {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, ${field_styp}_str(a[i],0));')
} else if sym.kind in [.f32, .f64] {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, _STR("%g", a[i]));')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, _STR("%g", 1, a[i]));')
} else if sym.kind == .string {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, _STR("\'%.*s\'", a[i].len, a[i].str));')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, _STR("\'%.*s\\000\'", 2, a[i]));')
} else {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, ${field_styp}_str(a[i]));')
}
@ -3307,18 +3397,18 @@ fn (mut g Gen) gen_str_for_map(info table.Map, styp, str_fn_name string) {
g.auto_str_funcs.writeln('\tstrings__Builder_write(&sb, tos3("{"));')
g.auto_str_funcs.writeln('\tfor (unsigned int i = 0; i < m.key_values.size; i++) {')
g.auto_str_funcs.writeln('\t\tstring key = (*(string*)DenseArray_get(m.key_values, i));')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, _STR("\'%.*s\'", key.len, key.str));')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, _STR("\'%.*s\\000\'", 2, key));')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, tos3(": "));')
g.auto_str_funcs.write('\t$val_styp it = (*($val_styp*)map_get3(')
g.auto_str_funcs.write('m, (*(string*)DenseArray_get(m.key_values, i))')
g.auto_str_funcs.write(', ')
g.auto_str_funcs.writeln(' &($val_styp[]) { $zero }));')
if val_sym.kind == .string {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, _STR("\'%.*s\'", it.len, it.str));')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, _STR("\'%.*s\\000\'", 2, it));')
} else if val_sym.kind == .struct_ && !val_sym.has_method('str') {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, ${val_styp}_str(it,0));')
} else if val_sym.kind in [.f32, .f64] {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, _STR("%g", it));')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, _STR("%g", 1, it));')
} else {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, ${val_styp}_str(it));')
}
@ -3350,17 +3440,17 @@ fn (mut g Gen) gen_str_for_varg(styp, str_fn_name string) {
fn (g Gen) type_to_fmt(typ table.Type) string {
sym := g.table.get_type_symbol(typ)
if sym.kind in [.struct_, .array, .array_fixed, .map] {
return '%.*s'
return '%.*s\\000'
} else if typ == table.string_type {
return "\'%.*s\'"
return "\'%.*s\\000\'"
} else if typ == table.bool_type {
return '%.*s'
return '%.*s\\000'
} else if sym.kind == .enum_ {
return '%.*s'
return '%.*s\\000'
} else if typ in [table.f32_type, table.f64_type] {
return '%g' // g removes trailing zeros unlike %f
return '%g\\000' // g removes trailing zeros unlike %f
}
return '%d'
return '%d\\000'
}
// Generates interface table and interface indexes

12
vlib/v/table/atypes.v
View File

@ -140,6 +140,16 @@ pub fn (typ Type) is_int() bool {
return typ.idx() in integer_type_idxs
}
[inline]
pub fn (typ Type) is_signed() bool {
return typ.idx() in signed_integer_type_idxs
}
[inline]
pub fn (typ Type) is_unsigned() bool {
return typ.idx() in unsigned_integer_type_idxs
}
[inline]
pub fn (typ Type) is_number() bool {
return typ.idx() in number_type_idxs
@ -175,6 +185,8 @@ pub const (
u32_type_idx,
u64_type_idx
]
signed_integer_type_idxs = [i8_type_idx, i16_type_idx, int_type_idx, i64_type_idx]
unsigned_integer_type_idxs = [byte_type_idx, u16_type_idx, u32_type_idx, u64_type_idx]
float_type_idxs = [f32_type_idx, f64_type_idx]
number_type_idxs = [i8_type_idx, i16_type_idx, int_type_idx, i64_type_idx, byte_type_idx,
u16_type_idx,

27
vlib/v/tests/string_interpolation_test.v
View File

@ -86,4 +86,31 @@ fn test_inttypes_string_interpolation() {
assert '$s $us' == '-23456 54321'
assert '$ui $i' == '3421958087 -1622999040'
assert '$l $ul' == '-7694555558525237396 17234006112912956370'
assert '>${s:11}< >${us:-13}<-' == '> -23456< >54321 <-'
assert '0x${ul:-19x}< >${l:22d}<-' == '0xef2b7d4001165bd2 < > -7694555558525237396<-'
}
fn test_utf8_string_interpolation() {
a := 'à-côté'
st := 'Sträßle'
m := '10€'
assert '$a $st $m' == 'à-côté Sträßle 10€'
assert '>${a:10}< >${st:-8}< >${m:5}<-' == '> à-côté< >Sträßle < > 10€<-'
e := '\u20AC' // Eurosign
// TODO: this fails with MSVC and tcc
// assert '100.00 $e' == '100.00 €'
}
struct S {
v1 int
v2 f64
}
fn (s S) str() string {
return '[${s.v1}, ${s.v2:.3f}]'
}
fn test_string_interpolation_str_evaluation() {
mut x := S{17, 13.455893}
assert '$x' == '[17, 13.456]'
}