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compiler: added structure printing capabilities

This commit is contained in:
Henrixounez 2019-06-27 00:12:55 +02:00 committed by Alexander Medvednikov
parent 694b34a995
commit 40df91fc08
2 changed files with 59 additions and 0 deletions

View File

@ -706,6 +706,19 @@ fn (p mut Parser) fn_call_args(f *Fn) *Fn {
else { else {
// Make sure this type has a `str()` method // Make sure this type has a `str()` method
if !T.has_method('str') { if !T.has_method('str') {
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('`$typ` needs to have method `str() string` to be printable')
}
p.cgen.cur_line = p.cgen.cur_line.left(index)
p.create_type_string(*T, name)
p.cgen.cur_line.replace(typ, '')
p.next()
return p.fn_call_args(f)
}
p.error('`$typ` needs to have method `str() string` to be printable') p.error('`$typ` needs to have method `str() string` to be printable')
} }
p.cgen.set_placeholder(amp_ph, '${typ}_str(') p.cgen.set_placeholder(amp_ph, '${typ}_str(')

View File

@ -654,3 +654,49 @@ fn is_name_char(c byte) bool {
return c.is_letter() || c == `_` return c.is_letter() || c == `_`
} }
fn (s mut Scanner) get_opening_bracket() int {
mut pos := s.pos
mut parentheses := 0
mut inside_string := false
for pos > 0 && s.text[pos] != `\n` {
if s.text[pos] == `)` && !inside_string {
parentheses++
}
if s.text[pos] == `(` && !inside_string {
parentheses--
}
if s.text[pos] == `\'` && s.text[pos - 1] != `\\` && s.text[pos - 1] != `\`` {
inside_string = !inside_string
}
if parentheses == 0 {
break
}
pos--
}
return pos
}
fn (s mut Scanner) create_type_string(T Type, name string) {
line := s.line_nr
inside_string := s.inside_string
mut newtext := '\'{ '
start := s.get_opening_bracket() + 1
end := s.pos
for i, field in T.fields {
if i != 0 {
newtext += ', '
}
newtext += '$field.name: ' + '$${name}.${field.name}'
}
newtext += ' }\''
s.text = s.text.substr(0, start) + newtext + s.text.substr(end, s.text.len)
s.pos = start - 2
s.line_nr = line
s.inside_string = inside_string
}
fn (p mut Parser) create_type_string(T Type, name string) {
p.scanner.create_type_string(T, name)
}