738 lines
19 KiB
V
738 lines
19 KiB
V
// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
|
|
// Use of this source code is governed by an MIT license
|
|
// that can be found in the LICENSE file.
|
|
module parser
|
|
|
|
import v.ast
|
|
import v.table
|
|
import v.token
|
|
import v.util
|
|
|
|
pub fn (mut p Parser) call_expr(language table.Language, mod string) ast.CallExpr {
|
|
// pub fn (mut p Parser) call_expr(language table.Language, mod string) ast.Expr {
|
|
first_pos := p.tok.position()
|
|
mut fn_name := if language == .c {
|
|
'C.$p.check_name()'
|
|
} else if language == .js {
|
|
'JS.$p.check_js_name()'
|
|
} else if mod.len > 0 {
|
|
'${mod}.$p.check_name()'
|
|
} else {
|
|
p.check_name()
|
|
}
|
|
if language != .v {
|
|
p.check_for_impure_v(language, first_pos)
|
|
}
|
|
mut or_kind := ast.OrKind.absent
|
|
if fn_name == 'json.decode' {
|
|
p.expecting_type = true // Makes name_expr() parse the type `User` in `json.decode(User, txt)`
|
|
p.expr_mod = ''
|
|
or_kind = .block
|
|
}
|
|
mut generic_type := table.void_type
|
|
mut generic_list_pos := p.tok.position()
|
|
if p.tok.kind == .lt {
|
|
// `foo<int>(10)`
|
|
p.next() // `<`
|
|
p.expr_mod = ''
|
|
generic_type = p.parse_type()
|
|
p.check(.gt) // `>`
|
|
generic_list_pos = generic_list_pos.extend(p.prev_tok.position())
|
|
// In case of `foo<T>()`
|
|
// T is unwrapped and registered in the checker.
|
|
if !generic_type.has_flag(.generic) {
|
|
full_generic_fn_name := if fn_name.contains('.') {
|
|
fn_name
|
|
} else {
|
|
p.prepend_mod(fn_name)
|
|
}
|
|
p.table.register_fn_gen_type(full_generic_fn_name, generic_type)
|
|
}
|
|
}
|
|
p.check(.lpar)
|
|
args := p.call_args()
|
|
last_pos := p.tok.position()
|
|
p.check(.rpar)
|
|
// ! in mutable methods
|
|
if p.tok.kind == .not {
|
|
p.next()
|
|
}
|
|
pos := first_pos.extend(last_pos)
|
|
mut or_stmts := []ast.Stmt{} // TODO remove unnecessary allocations by just using .absent
|
|
mut or_pos := p.tok.position()
|
|
if p.tok.kind == .key_orelse {
|
|
// `foo() or {}``
|
|
was_inside_or_expr := p.inside_or_expr
|
|
p.inside_or_expr = true
|
|
p.next()
|
|
p.open_scope()
|
|
p.scope.register(ast.Var{
|
|
name: 'err'
|
|
typ: table.string_type
|
|
pos: p.tok.position()
|
|
is_used: true
|
|
})
|
|
p.scope.register(ast.Var{
|
|
name: 'errcode'
|
|
typ: table.int_type
|
|
pos: p.tok.position()
|
|
is_used: true
|
|
})
|
|
or_kind = .block
|
|
or_stmts = p.parse_block_no_scope(false)
|
|
or_pos = or_pos.extend(p.prev_tok.position())
|
|
p.close_scope()
|
|
p.inside_or_expr = was_inside_or_expr
|
|
}
|
|
if p.tok.kind == .question {
|
|
// `foo()?`
|
|
p.next()
|
|
or_kind = .propagate
|
|
}
|
|
if fn_name in p.imported_symbols {
|
|
fn_name = p.imported_symbols[fn_name]
|
|
}
|
|
comments := p.eat_line_end_comments()
|
|
return ast.CallExpr{
|
|
name: fn_name
|
|
args: args
|
|
mod: p.mod
|
|
pos: pos
|
|
language: language
|
|
generic_type: generic_type
|
|
generic_list_pos: generic_list_pos
|
|
or_block: ast.OrExpr{
|
|
stmts: or_stmts
|
|
kind: or_kind
|
|
pos: or_pos
|
|
}
|
|
scope: p.scope
|
|
comments: comments
|
|
}
|
|
}
|
|
|
|
pub fn (mut p Parser) call_args() []ast.CallArg {
|
|
mut args := []ast.CallArg{}
|
|
start_pos := p.tok.position()
|
|
for p.tok.kind != .rpar {
|
|
if p.tok.kind == .eof {
|
|
p.error_with_pos('unexpected eof reached, while parsing call argument', start_pos)
|
|
return []
|
|
}
|
|
is_shared := p.tok.kind == .key_shared
|
|
is_atomic := p.tok.kind == .key_atomic
|
|
is_mut := p.tok.kind == .key_mut || is_shared || is_atomic
|
|
if is_mut {
|
|
p.next()
|
|
}
|
|
mut comments := p.eat_comments()
|
|
arg_start_pos := p.tok.position()
|
|
mut array_decompose := false
|
|
if p.tok.kind == .ellipsis {
|
|
p.next()
|
|
array_decompose = true
|
|
}
|
|
mut e := p.expr(0)
|
|
if array_decompose {
|
|
e = ast.ArrayDecompose{
|
|
expr: e
|
|
pos: p.tok.position()
|
|
}
|
|
}
|
|
if mut e is ast.StructInit {
|
|
e.pre_comments << comments
|
|
comments = []ast.Comment{}
|
|
}
|
|
pos := arg_start_pos.extend(p.prev_tok.position())
|
|
comments << p.eat_comments()
|
|
args << ast.CallArg{
|
|
is_mut: is_mut
|
|
share: table.sharetype_from_flags(is_shared, is_atomic)
|
|
expr: e
|
|
comments: comments
|
|
pos: pos
|
|
}
|
|
if p.tok.kind != .rpar {
|
|
p.check(.comma)
|
|
}
|
|
}
|
|
return args
|
|
}
|
|
|
|
fn (mut p Parser) fn_decl() ast.FnDecl {
|
|
p.top_level_statement_start()
|
|
start_pos := p.tok.position()
|
|
is_manualfree := p.is_manualfree || p.attrs.contains('manualfree')
|
|
is_deprecated := p.attrs.contains('deprecated')
|
|
is_direct_arr := p.attrs.contains('direct_array_access')
|
|
mut is_unsafe := p.attrs.contains('unsafe')
|
|
is_pub := p.tok.kind == .key_pub
|
|
if is_pub {
|
|
p.next()
|
|
}
|
|
p.check(.key_fn)
|
|
p.open_scope()
|
|
// C. || JS.
|
|
mut language := table.Language.v
|
|
if p.tok.kind == .name && p.tok.lit == 'C' {
|
|
is_unsafe = !p.attrs.contains('trusted')
|
|
language = table.Language.c
|
|
} else if p.tok.kind == .name && p.tok.lit == 'JS' {
|
|
language = table.Language.js
|
|
}
|
|
if language != .v {
|
|
p.next()
|
|
p.check(.dot)
|
|
p.check_for_impure_v(language, p.tok.position())
|
|
}
|
|
// Receiver?
|
|
mut rec_name := ''
|
|
mut is_method := false
|
|
mut receiver_pos := token.Position{}
|
|
mut rec_type_pos := token.Position{}
|
|
mut rec_type := table.void_type
|
|
mut rec_mut := false
|
|
mut params := []table.Param{}
|
|
if p.tok.kind == .lpar {
|
|
p.next() // (
|
|
is_method = true
|
|
is_shared := p.tok.kind == .key_shared
|
|
is_atomic := p.tok.kind == .key_atomic
|
|
rec_mut = p.tok.kind == .key_mut || is_shared || is_atomic
|
|
if rec_mut {
|
|
p.next() // `mut`
|
|
}
|
|
rec_start_pos := p.tok.position()
|
|
rec_name = p.check_name()
|
|
if !rec_mut {
|
|
rec_mut = p.tok.kind == .key_mut
|
|
if rec_mut {
|
|
p.warn_with_pos('use `(mut f Foo)` instead of `(f mut Foo)`', p.tok.position())
|
|
}
|
|
}
|
|
receiver_pos = rec_start_pos.extend(p.tok.position())
|
|
is_amp := p.tok.kind == .amp
|
|
if p.tok.kind == .name && p.tok.lit == 'JS' {
|
|
language = table.Language.js
|
|
}
|
|
// if rec_mut {
|
|
// p.check(.key_mut)
|
|
// }
|
|
// TODO: talk to alex, should mut be parsed with the type like this?
|
|
// or should it be a property of the arg, like this ptr/mut becomes indistinguishable
|
|
rec_type_pos = p.tok.position()
|
|
rec_type = p.parse_type_with_mut(rec_mut)
|
|
if rec_type.idx() == 0 {
|
|
// error is set in parse_type
|
|
return ast.FnDecl{
|
|
scope: 0
|
|
}
|
|
}
|
|
rec_type_pos = rec_type_pos.extend(p.prev_tok.position())
|
|
if is_amp && rec_mut {
|
|
p.error('use `(mut f Foo)` or `(f &Foo)` instead of `(mut f &Foo)`')
|
|
return ast.FnDecl{
|
|
scope: 0
|
|
}
|
|
}
|
|
if is_shared {
|
|
rec_type = rec_type.set_flag(.shared_f)
|
|
}
|
|
if is_atomic {
|
|
rec_type = rec_type.set_flag(.atomic_f)
|
|
}
|
|
params << table.Param{
|
|
pos: rec_start_pos
|
|
name: rec_name
|
|
is_mut: rec_mut
|
|
typ: rec_type
|
|
}
|
|
p.check(.rpar)
|
|
}
|
|
mut name := ''
|
|
if p.tok.kind == .name {
|
|
pos := p.tok.position()
|
|
// TODO high order fn
|
|
name = if language == .js { p.check_js_name() } else { p.check_name() }
|
|
if language == .v && !p.pref.translated && util.contains_capital(name) && p.mod != 'builtin' {
|
|
p.error_with_pos('function names cannot contain uppercase letters, use snake_case instead',
|
|
pos)
|
|
return ast.FnDecl{
|
|
scope: 0
|
|
}
|
|
}
|
|
type_sym := p.table.get_type_symbol(rec_type)
|
|
// interfaces are handled in the checker, methods can not be defined on them this way
|
|
if is_method && (type_sym.has_method(name) && type_sym.kind != .interface_) {
|
|
p.error_with_pos('duplicate method `$name`', pos)
|
|
return ast.FnDecl{
|
|
scope: 0
|
|
}
|
|
}
|
|
// cannot redefine buildin function
|
|
if !is_method && p.mod != 'builtin' && name in builtin_functions {
|
|
p.error_with_pos('cannot redefine builtin function `$name`', pos)
|
|
return ast.FnDecl{
|
|
scope: 0
|
|
}
|
|
}
|
|
}
|
|
if p.tok.kind in [.plus, .minus, .mul, .div, .mod, .gt, .lt, .eq, .ne, .le, .ge] &&
|
|
p.peek_tok.kind == .lpar {
|
|
name = p.tok.kind.str() // op_to_fn_name()
|
|
if rec_type == table.void_type {
|
|
p.error_with_pos('cannot use operator overloading with normal functions',
|
|
p.tok.position())
|
|
}
|
|
p.next()
|
|
}
|
|
// <T>
|
|
is_generic := p.tok.kind == .lt
|
|
if is_generic {
|
|
p.next()
|
|
p.next()
|
|
p.check(.gt)
|
|
}
|
|
// Args
|
|
args2, are_args_type_only, is_variadic := p.fn_args()
|
|
params << args2
|
|
if !are_args_type_only {
|
|
for param in params {
|
|
if p.scope.known_var(param.name) {
|
|
p.error_with_pos('redefinition of parameter `$param.name`', param.pos)
|
|
return ast.FnDecl{
|
|
scope: 0
|
|
}
|
|
}
|
|
p.scope.register(ast.Var{
|
|
name: param.name
|
|
typ: param.typ
|
|
is_mut: param.is_mut
|
|
pos: param.pos
|
|
is_used: true
|
|
is_arg: true
|
|
})
|
|
}
|
|
}
|
|
mut end_pos := p.prev_tok.position()
|
|
// Return type
|
|
mut return_type := table.void_type
|
|
if p.tok.kind.is_start_of_type() ||
|
|
(p.tok.kind == .key_fn && p.tok.line_nr == p.prev_tok.line_nr) {
|
|
return_type = p.parse_type()
|
|
}
|
|
mut type_sym_method_idx := 0
|
|
// Register
|
|
if is_method {
|
|
mut type_sym := p.table.get_type_symbol(rec_type)
|
|
// Do not allow to modify / add methods to types from other modules
|
|
// arrays/maps dont belong to a module only their element types do
|
|
// we could also check if kind is .array, .array_fixed, .map instead of mod.len
|
|
mut is_non_local := type_sym.mod.len > 0 && type_sym.mod != p.mod && type_sym.language == .v
|
|
// check maps & arrays, must be defined in same module as the elem type
|
|
if !is_non_local && type_sym.kind in [.array, .map] {
|
|
elem_type_sym := p.table.get_type_symbol(p.table.value_type(rec_type))
|
|
is_non_local = elem_type_sym.mod.len > 0 &&
|
|
elem_type_sym.mod != p.mod && elem_type_sym.language == .v
|
|
}
|
|
if is_non_local {
|
|
p.error_with_pos('cannot define new methods on non-local type $type_sym.name',
|
|
rec_type_pos)
|
|
return ast.FnDecl{
|
|
scope: 0
|
|
}
|
|
}
|
|
// p.warn('reg method $type_sym.name . $name ()')
|
|
type_sym_method_idx = type_sym.register_method(table.Fn{
|
|
name: name
|
|
params: params
|
|
return_type: return_type
|
|
is_variadic: is_variadic
|
|
is_generic: is_generic
|
|
is_pub: is_pub
|
|
is_deprecated: is_deprecated
|
|
is_unsafe: is_unsafe
|
|
mod: p.mod
|
|
attrs: p.attrs
|
|
})
|
|
} else {
|
|
if language == .c {
|
|
name = 'C.$name'
|
|
} else if language == .js {
|
|
name = 'JS.$name'
|
|
} else {
|
|
name = p.prepend_mod(name)
|
|
}
|
|
if _ := p.table.find_fn(name) {
|
|
p.fn_redefinition_error(name)
|
|
}
|
|
// p.warn('reg functn $name ()')
|
|
p.table.register_fn(table.Fn{
|
|
name: name
|
|
params: params
|
|
return_type: return_type
|
|
is_variadic: is_variadic
|
|
is_generic: is_generic
|
|
is_pub: is_pub
|
|
is_deprecated: is_deprecated
|
|
is_unsafe: is_unsafe
|
|
mod: p.mod
|
|
attrs: p.attrs
|
|
language: language
|
|
})
|
|
}
|
|
end_pos = p.prev_tok.position()
|
|
// Body
|
|
p.cur_fn_name = name
|
|
mut stmts := []ast.Stmt{}
|
|
no_body := p.tok.kind != .lcbr
|
|
body_start_pos := p.peek_tok.position()
|
|
if p.tok.kind == .lcbr {
|
|
stmts = p.parse_block_no_scope(true)
|
|
}
|
|
if !no_body && are_args_type_only {
|
|
p.error_with_pos('functions with type only args can not have bodies', body_start_pos)
|
|
return ast.FnDecl{
|
|
scope: 0
|
|
}
|
|
}
|
|
fn_decl := ast.FnDecl{
|
|
name: name
|
|
mod: p.mod
|
|
stmts: stmts
|
|
return_type: return_type
|
|
params: params
|
|
is_manualfree: is_manualfree
|
|
is_deprecated: is_deprecated
|
|
is_direct_arr: is_direct_arr
|
|
is_pub: is_pub
|
|
is_generic: is_generic
|
|
is_variadic: is_variadic
|
|
receiver: ast.Field{
|
|
name: rec_name
|
|
typ: rec_type
|
|
}
|
|
receiver_pos: receiver_pos
|
|
is_method: is_method
|
|
method_type_pos: rec_type_pos
|
|
method_idx: type_sym_method_idx
|
|
rec_mut: rec_mut
|
|
language: language
|
|
no_body: no_body
|
|
pos: start_pos.extend_with_last_line(end_pos, p.prev_tok.line_nr)
|
|
body_pos: body_start_pos
|
|
file: p.file_name
|
|
is_builtin: p.builtin_mod || p.mod in util.builtin_module_parts
|
|
attrs: p.attrs
|
|
scope: p.scope
|
|
}
|
|
p.close_scope()
|
|
return fn_decl
|
|
}
|
|
|
|
fn (mut p Parser) anon_fn() ast.AnonFn {
|
|
pos := p.tok.position()
|
|
p.check(.key_fn)
|
|
if p.pref.is_script && p.tok.kind == .name {
|
|
p.error_with_pos('function declarations in script mode should be before all script statements',
|
|
p.tok.position())
|
|
return ast.AnonFn{}
|
|
}
|
|
p.open_scope()
|
|
// TODO generics
|
|
args, _, is_variadic := p.fn_args()
|
|
for arg in args {
|
|
p.scope.register(ast.Var{
|
|
name: arg.name
|
|
typ: arg.typ
|
|
is_mut: arg.is_mut
|
|
pos: arg.pos
|
|
is_used: true
|
|
is_arg: true
|
|
})
|
|
}
|
|
mut same_line := p.tok.line_nr == p.prev_tok.line_nr
|
|
mut return_type := table.void_type
|
|
// lpar: multiple return types
|
|
if same_line {
|
|
if p.tok.kind.is_start_of_type() {
|
|
return_type = p.parse_type()
|
|
} else if p.tok.kind != .lcbr {
|
|
p.error_with_pos('expected return type, not $p.tok for anonymous function',
|
|
p.tok.position())
|
|
}
|
|
}
|
|
mut stmts := []ast.Stmt{}
|
|
no_body := p.tok.kind != .lcbr
|
|
same_line = p.tok.line_nr == p.prev_tok.line_nr
|
|
if no_body && same_line {
|
|
p.error_with_pos('unexpected `$p.tok.kind` after anonymous function signature, expecting `{`',
|
|
p.tok.position())
|
|
}
|
|
if p.tok.kind == .lcbr {
|
|
stmts = p.parse_block_no_scope(false)
|
|
}
|
|
p.close_scope()
|
|
mut func := table.Fn{
|
|
params: args
|
|
is_variadic: is_variadic
|
|
return_type: return_type
|
|
}
|
|
name := 'anon_${p.tok.pos}_${p.table.fn_type_signature(func)}'
|
|
func.name = name
|
|
idx := p.table.find_or_register_fn_type(p.mod, func, true, false)
|
|
typ := table.new_type(idx)
|
|
// name := p.table.get_type_name(typ)
|
|
return ast.AnonFn{
|
|
decl: ast.FnDecl{
|
|
name: name
|
|
mod: p.mod
|
|
stmts: stmts
|
|
return_type: return_type
|
|
params: args
|
|
is_variadic: is_variadic
|
|
is_method: false
|
|
is_anon: true
|
|
no_body: no_body
|
|
pos: pos
|
|
file: p.file_name
|
|
scope: p.scope
|
|
}
|
|
typ: typ
|
|
}
|
|
}
|
|
|
|
// part of fn declaration
|
|
fn (mut p Parser) fn_args() ([]table.Param, bool, bool) {
|
|
p.check(.lpar)
|
|
mut args := []table.Param{}
|
|
mut is_variadic := false
|
|
// `int, int, string` (no names, just types)
|
|
argname := if p.tok.kind == .name && p.tok.lit.len > 0 && p.tok.lit[0].is_capital() {
|
|
p.prepend_mod(p.tok.lit)
|
|
} else {
|
|
p.tok.lit
|
|
}
|
|
types_only := p.tok.kind in [.amp, .ellipsis, .key_fn] ||
|
|
(p.peek_tok.kind == .comma && p.table.known_type(argname)) || p.peek_tok.kind == .dot ||
|
|
p.peek_tok.kind == .rpar
|
|
// TODO copy pasta, merge 2 branches
|
|
if types_only {
|
|
// p.warn('types only')
|
|
mut arg_no := 1
|
|
for p.tok.kind != .rpar {
|
|
if p.tok.kind == .eof {
|
|
p.error_with_pos('expecting `)`', p.tok.position())
|
|
return []table.Param{}, false, false
|
|
}
|
|
is_shared := p.tok.kind == .key_shared
|
|
is_atomic := p.tok.kind == .key_atomic
|
|
is_mut := p.tok.kind == .key_mut || is_shared || is_atomic
|
|
if is_mut {
|
|
p.next()
|
|
}
|
|
if p.tok.kind == .ellipsis {
|
|
p.next()
|
|
is_variadic = true
|
|
}
|
|
pos := p.tok.position()
|
|
mut arg_type := p.parse_type()
|
|
if arg_type == 0 {
|
|
// error is added in parse_type
|
|
return []table.Param{}, false, false
|
|
}
|
|
if is_mut {
|
|
if !arg_type.has_flag(.generic) {
|
|
if is_shared {
|
|
p.check_fn_shared_arguments(arg_type, pos)
|
|
} else if is_atomic {
|
|
p.check_fn_atomic_arguments(arg_type, pos)
|
|
} else {
|
|
p.check_fn_mutable_arguments(arg_type, pos)
|
|
}
|
|
} else if is_shared || is_atomic {
|
|
p.error_with_pos('generic object cannot be `atomic`or `shared`', pos)
|
|
return []table.Param{}, false, false
|
|
}
|
|
// if arg_type.is_ptr() {
|
|
// p.error('cannot mut')
|
|
// }
|
|
// arg_type = arg_type.to_ptr()
|
|
arg_type = arg_type.set_nr_muls(1)
|
|
if is_shared {
|
|
arg_type = arg_type.set_flag(.shared_f)
|
|
}
|
|
if is_atomic {
|
|
arg_type = arg_type.set_flag(.atomic_f)
|
|
}
|
|
}
|
|
if is_variadic {
|
|
arg_type = table.new_type(p.table.find_or_register_array(arg_type, 1)).set_flag(.variadic)
|
|
}
|
|
if p.tok.kind == .eof {
|
|
p.error_with_pos('expecting `)`', p.prev_tok.position())
|
|
return []table.Param{}, false, false
|
|
}
|
|
if p.tok.kind == .comma {
|
|
if is_variadic {
|
|
p.error_with_pos('cannot use ...(variadic) with non-final parameter no $arg_no',
|
|
pos)
|
|
return []table.Param{}, false, false
|
|
}
|
|
p.next()
|
|
}
|
|
args << table.Param{
|
|
pos: pos
|
|
name: ''
|
|
is_mut: is_mut
|
|
typ: arg_type
|
|
}
|
|
arg_no++
|
|
if arg_no > 1024 {
|
|
p.error_with_pos('too many args', pos)
|
|
return []table.Param{}, false, false
|
|
}
|
|
}
|
|
} else {
|
|
for p.tok.kind != .rpar {
|
|
if p.tok.kind == .eof {
|
|
p.error_with_pos('expecting `)`', p.tok.position())
|
|
return []table.Param{}, false, false
|
|
}
|
|
is_shared := p.tok.kind == .key_shared
|
|
is_atomic := p.tok.kind == .key_atomic
|
|
mut is_mut := p.tok.kind == .key_mut || is_shared || is_atomic
|
|
if is_mut {
|
|
p.next()
|
|
}
|
|
mut arg_pos := [p.tok.position()]
|
|
mut arg_names := [p.check_name()]
|
|
// `a, b, c int`
|
|
for p.tok.kind == .comma {
|
|
if !p.pref.is_fmt {
|
|
p.warn('`fn f(x, y Type)` syntax has been deprecated and will soon be removed. ' +
|
|
'Use `fn f(x Type, y Type)` instead. You can run `v fmt -w "$p.scanner.file_path"` to automatically fix your code.')
|
|
}
|
|
p.next()
|
|
arg_pos << p.tok.position()
|
|
arg_names << p.check_name()
|
|
}
|
|
if p.tok.kind == .key_mut {
|
|
// TODO remove old syntax
|
|
p.warn_with_pos('use `mut f Foo` instead of `f mut Foo`', p.tok.position())
|
|
is_mut = true
|
|
}
|
|
if p.tok.kind == .ellipsis {
|
|
p.next()
|
|
is_variadic = true
|
|
}
|
|
pos := p.tok.position()
|
|
mut typ := p.parse_type()
|
|
if typ == 0 {
|
|
// error is added in parse_type
|
|
return []table.Param{}, false, false
|
|
}
|
|
if is_mut {
|
|
if !typ.has_flag(.generic) {
|
|
if is_shared {
|
|
p.check_fn_shared_arguments(typ, pos)
|
|
} else if is_atomic {
|
|
p.check_fn_atomic_arguments(typ, pos)
|
|
} else {
|
|
p.check_fn_mutable_arguments(typ, pos)
|
|
}
|
|
} else if is_shared || is_atomic {
|
|
p.error_with_pos('generic object cannot be `atomic` or `shared`',
|
|
pos)
|
|
return []table.Param{}, false, false
|
|
}
|
|
typ = typ.set_nr_muls(1)
|
|
if is_shared {
|
|
typ = typ.set_flag(.shared_f)
|
|
}
|
|
if is_atomic {
|
|
typ = typ.set_flag(.atomic_f)
|
|
}
|
|
}
|
|
if is_variadic {
|
|
typ = table.new_type(p.table.find_or_register_array(typ, 1)).set_flag(.variadic)
|
|
}
|
|
for i, arg_name in arg_names {
|
|
args << table.Param{
|
|
pos: arg_pos[i]
|
|
name: arg_name
|
|
is_mut: is_mut
|
|
typ: typ
|
|
}
|
|
// if typ.typ.kind == .variadic && p.tok.kind == .comma {
|
|
if is_variadic && p.tok.kind == .comma {
|
|
p.error_with_pos('cannot use ...(variadic) with non-final parameter $arg_name',
|
|
arg_pos[i])
|
|
return []table.Param{}, false, false
|
|
}
|
|
}
|
|
if p.tok.kind == .eof {
|
|
p.error_with_pos('expecting `)`', p.prev_tok.position())
|
|
return []table.Param{}, false, false
|
|
}
|
|
if p.tok.kind != .rpar {
|
|
p.check(.comma)
|
|
}
|
|
}
|
|
}
|
|
p.check(.rpar)
|
|
return args, types_only, is_variadic
|
|
}
|
|
|
|
fn (mut p Parser) check_fn_mutable_arguments(typ table.Type, pos token.Position) {
|
|
sym := p.table.get_type_symbol(typ)
|
|
if sym.kind !in [.array, .struct_, .map, .placeholder, .sum_type] && !typ.is_ptr() && !typ.is_pointer() {
|
|
p.error_with_pos('mutable arguments are only allowed for arrays, maps, structs and pointers\n' +
|
|
'return values instead: `fn foo(mut n $sym.name) {` => `fn foo(n $sym.name) $sym.name {`',
|
|
pos)
|
|
}
|
|
}
|
|
|
|
fn (mut p Parser) check_fn_shared_arguments(typ table.Type, pos token.Position) {
|
|
sym := p.table.get_type_symbol(typ)
|
|
if sym.kind !in [.array, .struct_, .map, .placeholder] && !typ.is_ptr() {
|
|
p.error_with_pos('shared arguments are only allowed for arrays, maps, and structs\n',
|
|
pos)
|
|
}
|
|
}
|
|
|
|
fn (mut p Parser) check_fn_atomic_arguments(typ table.Type, pos token.Position) {
|
|
sym := p.table.get_type_symbol(typ)
|
|
if sym.kind !in [.u32, .int, .u64] {
|
|
p.error_with_pos('atomic arguments are only allowed for 32/64 bit integers\n' +
|
|
'use shared arguments instead: `fn foo(atomic n $sym.name) {` => `fn foo(shared n $sym.name) {`',
|
|
pos)
|
|
}
|
|
}
|
|
|
|
fn (mut p Parser) fn_redefinition_error(name string) {
|
|
if p.pref.translated {
|
|
return
|
|
}
|
|
// Find where this function was already declared
|
|
// TODO
|
|
/*
|
|
for file in p.ast_files {
|
|
|
|
}
|
|
*/
|
|
p.table.redefined_fns << name
|
|
// p.error('redefinition of function `$name`')
|
|
}
|
|
|
|
fn have_fn_main(stmts []ast.Stmt) bool {
|
|
for stmt in stmts {
|
|
if stmt is ast.FnDecl {
|
|
if stmt.name == 'main.main' && stmt.mod == 'main' {
|
|
return true
|
|
}
|
|
}
|
|
}
|
|
return false
|
|
}
|