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println: make aliases printable

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This commit is contained in:
Alexander Medvednikov 2019-07-10 14:26:37 +02:00
parent fba8443f30
commit c8fc262da3
2 changed files with 8 additions and 8 deletions
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13
compiler/fn.v
View File

@ -678,8 +678,8 @@ fn (p mut Parser) fn_call_args(f *Fn) *Fn {
str_args := f.str_args(p.table)// TODO this is C args
p.error('not enough arguments in call to `$f.name ($str_args)`')
}
// If `arg` is key_mut, the caller needs to provide `mut`:
// `arr := [1,2,3]; reverse(mut arr);`
// If `arg` is mutable, the caller needs to provide `mut`:
// `mut numbers := [1,2,3]; reverse(mut numbers);`
if arg.is_mut {
if p.tok != .key_mut {
p.error('`$arg.name` is a key_mut argument, you need to provide `mut`: `$f.name(...mut a...)`')
@ -690,10 +690,6 @@ fn (p mut Parser) fn_call_args(f *Fn) *Fn {
p.check(.key_mut)
}
p.expected_type = arg.typ
//TT := p.table.find_type(arg.typ)
//if arg.typ.parent == 'int' {
//p.expected_type =
//}
typ := p.bool_expression()
// Optimize `println`: replace it with `printf` to avoid extra allocations and
// function calls. `println(777)` => `printf("%d\n", 777)`
@ -712,12 +708,13 @@ fn (p mut Parser) fn_call_args(f *Fn) *Fn {
}
// Make sure this type has a `str()` method
if !T.has_method('str') {
error_msg := ('`$typ` needs to have method `str() string` to be printable')
if T.fields.len > 0 {
mut index := p.cgen.cur_line.len - 1
for index > 0 && p.cgen.cur_line[index] != ` ` { index-- }
name := p.cgen.cur_line.right(index + 1)
if name == '}' {
p.error('`$typ` needs to have method `str() string` to be printable')
p.error(error_msg)
}
p.cgen.cur_line = p.cgen.cur_line.left(index)
p.create_type_string(T, name)
@ -725,7 +722,7 @@ fn (p mut Parser) fn_call_args(f *Fn) *Fn {
p.next()
return p.fn_call_args(f)
}
p.error('`$typ` needs to have method `str() string` to be printable')
p.error(error_msg)
}
p.cgen.set_placeholder(ph, '${typ}_str(')
p.gen(')')

3
compiler/parser.v
View File

@ -2155,6 +2155,9 @@ fn (p mut Parser) typ_to_fmt(typ string) string {
return '%p'
}
}
if t.parent != '' {
return p.typ_to_fmt(t.parent)
}
return ''
}