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v2: fn_args()

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This commit is contained in:
Alexander Medvednikov 2020-02-11 13:03:10 +01:00
parent d25a0e30dc
commit 2838d12227
1 changed files with 76 additions and 65 deletions
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139
vlib/v/parser/fn.v
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@ -93,91 +93,39 @@ fn (p mut Parser) fn_decl() ast.FnDecl {
}
// println('fn decl $name')
p.check(.lpar)
mut is_variadic := false
// Args
mut args := []table.Var
mut ast_args := []ast.Arg
// `int, int, string` (no names, just types)
types_only := p.tok.kind in [.amp] || (p.peek_tok.kind == .comma && p.table.known_type(p.tok.lit)) ||
ast_args,is_variadic := p.fn_args()
for ast_arg in ast_args {
var := table.Var{
name: ast_arg.name
typ: ast_arg.typ
}
args << var
p.table.register_var(var)
}
//
p.peek_tok.kind == .rpar
if types_only {
p.warn('types only')
mut arg_no := 1
for p.tok.kind != .rpar {
arg_name := 'arg_$arg_no'
if p.tok.kind == .ellipsis {
p.check(.ellipsis)
is_variadic = true
}
arg_type := p.parse_type()
if p.tok.kind == .comma {
if is_variadic {
p.error('cannot use ...(variadic) with non-final parameter no $arg_no')
}
p.next()
}
/*
arg := table.Var{
name: arg_name
typ: arg_type
}
args << arg
// p.table.register_var(arg)
ast_args << ast.Arg{
name: arg_name
typ: arg_type
}
}
arg_no++
}
else {
for p.tok.kind != .rpar {
mut arg_names := [p.check_name()]
// `a, b, c int`
for p.tok.kind == .comma {
p.check(.comma)
arg_names << p.check_name()
}
if p.tok.kind == .key_mut {
p.check(.key_mut)
}
if p.tok.kind == .ellipsis {
p.check(.ellipsis)
is_variadic = true
}
typ := p.parse_type()
for arg_name in arg_names {
arg := table.Var{
name: arg_name
typ: typ
}
args << arg
p.table.register_var(arg)
ast_args << ast.Arg{
name: arg_name
typ: typ
}
// if typ.typ.kind == .variadic && p.tok.kind == .comma {
if is_variadic && p.tok.kind == .comma {
p.error('cannot use ...(variadic) with non-final parameter $arg_name')
}
}
if p.tok.kind != .rpar {
p.check(.comma)
}
}
}
p.check(.rpar)
*/
// Return type
mut typ := table.void_type
if p.tok.kind in [.name, .lpar, .amp, .lsbr, .question] {
typ = p.parse_type()
p.return_type = typ
}
else {
// p.return_type = table.void_type
p.return_type = typ
}
if is_method {
type_sym := p.table.get_type_symbol(rec_type)
ok := p.table.register_method(type_sym, table.Fn{
@ -215,3 +163,66 @@ fn (p mut Parser) fn_decl() ast.FnDecl {
}
}
}
fn (p mut Parser) fn_args() ([]ast.Arg,bool) {
mut args := []ast.Arg
mut is_variadic := false
// `int, int, string` (no names, just types)
types_only := p.tok.kind in [.amp] || (p.peek_tok.kind == .comma && p.table.known_type(p.tok.lit)) || p.peek_tok.kind == .rpar
if types_only {
p.warn('types only')
mut arg_no := 1
for p.tok.kind != .rpar {
arg_name := 'arg_$arg_no'
if p.tok.kind == .ellipsis {
p.check(.ellipsis)
is_variadic = true
}
arg_type := p.parse_type()
if p.tok.kind == .comma {
if is_variadic {
p.error('cannot use ...(variadic) with non-final parameter no $arg_no')
}
p.next()
}
args << ast.Arg{
name: arg_name
typ: arg_type
}
}
arg_no++
}
else {
for p.tok.kind != .rpar {
mut arg_names := [p.check_name()]
// `a, b, c int`
for p.tok.kind == .comma {
p.check(.comma)
arg_names << p.check_name()
}
if p.tok.kind == .key_mut {
p.check(.key_mut)
}
if p.tok.kind == .ellipsis {
p.check(.ellipsis)
is_variadic = true
}
typ := p.parse_type()
for arg_name in arg_names {
args << ast.Arg{
name: arg_name
typ: typ
}
// if typ.typ.kind == .variadic && p.tok.kind == .comma {
if is_variadic && p.tok.kind == .comma {
p.error('cannot use ...(variadic) with non-final parameter $arg_name')
}
}
if p.tok.kind != .rpar {
p.check(.comma)
}
}
}
p.check(.rpar)
return args,is_variadic
}