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checker: clean up in array_init() (#18205)

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yuyi 2023-05-20 07:21:52 +08:00 committed by GitHub
parent 9d0a1d8496
commit 332235548e
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1 changed files with 8 additions and 20 deletions
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28
vlib/v/checker/containers.v
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@ -8,7 +8,6 @@ import v.token
fn (mut c Checker) array_init(mut node ast.ArrayInit) ast.Type {
mut elem_type := ast.void_type
// `x := []string{}` (the type was set in the parser)
// TODO type is not set for fixed arrays
if node.typ != ast.void_type {
if node.elem_type != 0 {
elem_sym := c.table.sym(node.elem_type)
@ -99,7 +98,7 @@ fn (mut c Checker) array_init(mut node ast.ArrayInit) ast.Type {
c.error('generic struct cannot be used in non-generic function', node.pos)
}
// &int{} check
// `&int{}` check
if node.elem_type.is_any_kind_of_pointer() && !c.inside_unsafe && node.has_len {
c.warn('arrays of references need to be initialized right away, therefore `len:` cannot be used (unless inside `unsafe`)',
node.pos)
@ -120,9 +119,9 @@ fn (mut c Checker) array_init(mut node ast.ArrayInit) ast.Type {
node.pos)
}
}
// a = []
// `a = []`
if node.exprs.len == 0 {
// a := fn_returing_opt_array() or { [] }
// `a := fn_returing_opt_array() or { [] }`
if c.expected_type == ast.void_type && c.expected_or_type != ast.void_type {
c.expected_type = c.expected_or_type
}
@ -132,11 +131,6 @@ fn (mut c Checker) array_init(mut node ast.ArrayInit) ast.Type {
node.pos)
return ast.void_type
}
// TODO: seperate errors once bug is fixed with `x := if expr { ... } else { ... }`
// if c.expected_type == ast.void_type {
// c.error('array_init: use `[]Type{}` instead of `[]`', node.pos)
// return ast.void_type
// }
array_info := type_sym.array_info()
node.elem_type = array_info.elem_type
// clear option flag incase of: `fn opt_arr() ?[]int { return [] }`
@ -146,7 +140,7 @@ fn (mut c Checker) array_init(mut node ast.ArrayInit) ast.Type {
c.expected_type
}.clear_flags(.option, .result)
}
// [1,2,3]
// `[1,2,3]`
if node.exprs.len > 0 && node.elem_type == ast.void_type {
mut expected_value_type := ast.void_type
mut expecting_interface_array := false
@ -156,25 +150,19 @@ fn (mut c Checker) array_init(mut node ast.ArrayInit) ast.Type {
expected_value_type = c.table.value_type(c.expected_type)
expected_value_sym := c.table.sym(expected_value_type)
if expected_value_sym.kind == .interface_ {
// Array of interfaces? (`[dog, cat]`) Save the interface type (`Animal`)
// array of interfaces? (`[dog, cat]`) Save the interface type (`Animal`)
expecting_interface_array = true
} else if expected_value_sym.kind == .sum_type {
expecting_sumtype_array = true
}
}
// expecting_interface_array := c.expected_type != 0 &&
// c.table.sym(c.table.value_type(c.expected_type)).kind == .interface_
//
// if expecting_interface_array {
// println('ex $c.expected_type')
// }
for i, mut expr in node.exprs {
typ := c.check_expr_opt_call(expr, c.expr(expr))
if typ == ast.void_type {
c.error('invalid void array element type', expr.pos())
}
node.expr_types << typ
// The first element's type
// the first element's type
if expecting_interface_array {
if i == 0 {
elem_type = expected_value_type
@ -203,7 +191,7 @@ fn (mut c Checker) array_init(mut node ast.ArrayInit) ast.Type {
}
continue
}
// The first element's type
// the first element's type
if i == 0 {
if expr.is_auto_deref_var() {
elem_type = ast.mktyp(typ.deref())
@ -250,7 +238,7 @@ fn (mut c Checker) array_init(mut node ast.ArrayInit) ast.Type {
}
node.elem_type = elem_type
} else if node.is_fixed && node.exprs.len == 1 && node.elem_type != ast.void_type {
// [50]u8
// `[50]u8`
mut fixed_size := i64(0)
init_expr := node.exprs[0]
c.expr(init_expr)