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compiler: allow mut passed as argument to be modified

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This commit is contained in:
Henrixounez 2019-06-28 19:10:32 +02:00 committed by Alexander Medvednikov
parent ffa69921f5
commit 165dfe5fe0
2 changed files with 23 additions and 1 deletions
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3
compiler/parser.v
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@ -1193,7 +1193,7 @@ fn (p mut Parser) name_expr() string {
hack_lit := p.lit
// amp
ptr := p.tok == AMP
deref := p.tok == MUL
mut deref := p.tok == MUL
if ptr || deref {
p.next()
}
@ -1237,6 +1237,7 @@ fn (p mut Parser) name_expr() string {
// Variable
v := p.cur_fn.find_var(name)
if v.name.len != 0 {
deref = deref || (v.is_arg && v.is_mut && is_mutable_type(v.typ))
if ptr {
p.gen('& /*vvar*/ ')
}

21
compiler/scanner.v
View File

@ -713,3 +713,24 @@ fn (s mut Scanner) create_type_string(T Type, name string) {
fn (p mut Parser) create_type_string(T Type, name string) {
p.scanner.create_type_string(T, name)
}
//Checks if mut type can be dereferenced to be modified
fn is_mutable_type(typ string) bool {
if typ == 'bool*' {
return true
}
if typ == 'int*' || typ == 'rune*' || typ == 'i8*' ||
typ == 'i16*' || typ == 'i32*' || typ == 'i64*' {
return true
}
if typ == 'byte*' || typ == 'u8*' || typ == 'u16*' ||
typ == 'u32*' || typ == 'u64*' {
return true
}
if typ == 'f32*' || typ == 'f64*' {
return true
}
if typ == 'string*' {
return true
}
}