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comp_for: allow checking full mehod and arg types (#5997)

pull/6230/head^2
spaceface777 2020-08-27 15:00:44 +02:00 committed by GitHub
parent 7476428def
commit eff319f869
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6 changed files with 142 additions and 95 deletions
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61
examples/compiletime/compile-time-for.v
View File

@ -1,45 +1,32 @@
module main
struct App {}
struct App {
test string [test]
mut:
a string
}
fn (mut app App) method_one() {}
fn (mut app App) method_two() int { return 0 }
fn (mut app App) method_three(s string) string { return s }
fn main() {
println('All functions')
$for method in App.methods {
$if method.@type is int {
println('hi')
$if method.Type is fn(string) string {
println('$method.name IS `fn(string) string`')
} $else {
println('$method.name is NOT `fn(string) string`')
}
println('$method.name.len')
println('$method.name.str')
println('Method: $method.name')
println('Attributes: $method.attrs')
println('Return type: $method.ret_type')
}
println('All integer functions')
$for method in App.methods {
println('Method: $method.name')
println('Attributes: $method.attrs')
}
$for field in App.fields {
$if field.@type is string {
println(field)
$if method.ReturnType !is int {
println('$method.name does NOT return `int`')
} $else {
println('$method.name DOES return `int`')
}
$if method.args[0].Type !is string {
println("${method.name}'s first arg is NOT `string`")
} $else {
println("${method.name}'s first arg IS `string`")
}
// TODO: Double inversion, should this even be allowed?
$if method.Type is fn() {
println('$method.name IS a void method')
} $else {
println('$method.name is NOT a void method')
}
println('')
}
}
fn (mut app App) method_one() {
}
fn (mut app App) method_two() {
}
fn (mut app App) method_three() int {
return 0
}
fn (mut app App) method_four() int {
return 1
}

21
vlib/builtin/builtin.v
View File

@ -291,26 +291,25 @@ fn __print_assert_failure(i &VAssertMetaInfo) {
}
}
pub struct MethodAttr {
pub struct MethodArgs {
pub:
value string
method string
Type int
}
pub struct FunctionData {
pub:
name string
attrs []string
ret_type string
@type int
name string
attrs []string
args []MethodArgs
ReturnType int
Type int
}
pub struct FieldData {
pub:
name string
attrs []string
typ string
name string
attrs []string
is_pub bool
is_mut bool
@type int
Type int
}

102
vlib/v/gen/comptime.v
View File

@ -107,31 +107,33 @@ fn (mut g Gen) comp_if(mut it ast.CompIf) {
}
if it.kind == .typecheck {
mut comptime_var_type := table.Type(0)
mut name := ''
if it.tchk_expr is ast.SelectorExpr {
se := it.tchk_expr as ast.SelectorExpr
x := se.expr.str()
comptime_var_type = g.comptime_var_type_map[x]
name = '${se.expr}.$se.field_name'
comptime_var_type = g.comptime_var_type_map[name]
}
if comptime_var_type == 0 {
$if trace_gen ? {
eprintln('Known compile time types: ')
eprintln(g.comptime_var_type_map.str())
}
verror('the compile time type of `$it.tchk_expr.str()` is unknown')
// if comptime_var_type == 0 {
// $if trace_gen ? {
// eprintln('Known compile time types: ')
// eprintln(g.comptime_var_type_map.str())
// }
// // verror('the compile time type of `$it.tchk_expr.str()` is unknown')
// return
// }
it_type_name := g.table.get_type_name(it.tchk_type)
should_write := (comptime_var_type == it.tchk_type && !it.is_not) ||
(comptime_var_type != it.tchk_type && it.is_not)
if should_write {
inversion := if it.is_not { '!' } else { '' }
g.writeln('/* \$if $name ${inversion}is $it_type_name */ {')
g.stmts(it.stmts)
g.writeln('}')
} else if it.has_else {
g.writeln('/* \$else */ {')
g.stmts(it.else_stmts)
g.writeln('}')
}
ret_type_name := g.table.get_type_symbol(comptime_var_type).name
it_type_name := g.table.get_type_symbol(it.tchk_type).name
types_match := comptime_var_type == it.tchk_type
g.writeln('{ // \$if $it.val is $it_type_name, typecheck start, $comptime_var_type == $it.tchk_type => $ret_type_name == $it_type_name => $types_match ')
mut stmts := it.stmts
if !types_match {
stmts = []ast.Stmt{}
if it.has_else {
stmts = it.else_stmts
}
}
g.stmts(stmts)
g.writeln('} // typecheck end')
return
}
ifdef := g.comp_if_to_ifdef(it.val, it.is_opt)
@ -192,17 +194,53 @@ fn (mut g Gen) comp_for(node ast.CompFor) {
g.writeln('\t${node.val_var}.attrs = new_array_from_c_array($attrs.len, $attrs.len, sizeof(string), _MOV((string[$attrs.len]){' +
attrs.join(', ') + '}));')
}
method_sym := g.table.get_type_symbol(method.return_type)
g.writeln('\t${node.val_var}.ret_type = tos_lit("$method_sym.name");')
styp := int(method.return_type).str()
g.writeln('\t${node.val_var}.type = $styp;')
if method.args.len < 2 {
// 0 or 1 (the receiver) args
g.writeln('\t${node.val_var}.args = __new_array_with_default(0, 0, sizeof(MethodArgs), 0);')
} else {
len := method.args.len - 1
g.write('\t${node.val_var}.args = new_array_from_c_array($len, $len, sizeof(MethodArgs), _MOV((MethodArgs[$len]){')
// Skip receiver arg
for j, arg in method.args[1..] {
typ := arg.typ.idx()
g.write(typ.str())
if j < len - 1 {
g.write(', ')
}
g.comptime_var_type_map['${node.val_var}.args[$j].Type'] = typ
}
g.writeln('}));')
}
mut sig := 'anon_fn_'
// skip the first (receiver) arg
for j, arg in method.args[1..] {
// TODO: ignore mut/pts in sig for now
typ := arg.typ.set_nr_muls(0)
sig += '$typ'
if j < method.args.len - 2 {
sig += '_'
}
}
sig += '_$method.return_type'
styp := g.table.find_type_idx(sig)
// println(styp)
// if styp == 0 { }
// TODO: type aliases
ret_typ := method.return_type.idx()
g.writeln('\t${node.val_var}.Type = $styp;')
g.writeln('\t${node.val_var}.ReturnType = $ret_typ;')
//
g.comptime_var_type_map[node.val_var] = method.return_type
g.comptime_var_type_map['${node.val_var}.ReturnType'] = ret_typ
g.comptime_var_type_map['${node.val_var}.Type'] = styp
g.stmts(node.stmts)
i++
g.writeln('')
for key, _ in g.comptime_var_type_map {
if key.starts_with(node.val_var) {
g.comptime_var_type_map.delete(key)
}
}
}
g.comptime_var_type_map.delete(node.val_var)
} else if node.kind == .fields {
// TODO add fields
if sym.info is table.Struct {
@ -224,13 +262,13 @@ fn (mut g Gen) comp_for(node ast.CompFor) {
g.writeln('\t${node.val_var}.attrs = new_array_from_c_array($attrs.len, $attrs.len, sizeof(string), _MOV((string[$attrs.len]){' +
attrs.join(', ') + '}));')
}
field_sym := g.table.get_type_symbol(field.typ)
g.writeln('\t${node.val_var}.typ = tos_lit("$field_sym.name");')
styp := int(field.typ).str()
g.writeln('\t${node.val_var}.type = $styp;')
// field_sym := g.table.get_type_symbol(field.typ)
// g.writeln('\t${node.val_var}.typ = tos_lit("$field_sym.name");')
styp := field.typ
g.writeln('\t${node.val_var}.Type = $styp;')
g.writeln('\t${node.val_var}.is_pub = $field.is_pub;')
g.writeln('\t${node.val_var}.is_mut = $field.is_mut;')
g.comptime_var_type_map[node.val_var] = field.typ
g.comptime_var_type_map[node.val_var + '.Type'] = styp
g.stmts(node.stmts)
i++
g.writeln('')

28
vlib/v/parser/comptime.v
View File

@ -193,7 +193,8 @@ fn (mut p Parser) comp_if() ast.Stmt {
// return p.vweb()
// }
p.check(.key_if)
is_not := p.tok.kind == .not
mut is_not := p.tok.kind == .not
inversion_pos := p.tok.position()
if is_not {
p.next()
}
@ -202,7 +203,7 @@ fn (mut p Parser) comp_if() ast.Stmt {
mut val := ''
mut tchk_expr := ast.Expr{}
if p.peek_tok.kind == .dot {
vname := p.parse_ident(table.Language.v)
vname := p.parse_ident(.v)
cobj := p.scope.find(vname.name) or {
p.error_with_pos('unknown variable `$vname.name`', name_pos_start)
return ast.Stmt{}
@ -210,9 +211,17 @@ fn (mut p Parser) comp_if() ast.Stmt {
if cobj is ast.Var {
tchk_expr = p.dot_expr(vname)
val = vname.name
if tchk_expr is ast.SelectorExpr {
if tchk_expr.field_name !in ['type', '@type'] {
p.error_with_pos('only the `.@type` field name is supported for now',
if tchk_expr is ast.SelectorExpr as tchk_expr2 {
if p.tok.kind == .lsbr && tchk_expr2.field_name == 'args' {
tchk_expr = p.index_expr(tchk_expr)
if p.tok.kind == .dot && p.peek_tok.lit == 'Type' {
tchk_expr = p.dot_expr(tchk_expr)
} else {
p.error_with_pos('only the `Type` field is supported for arguments',
p.peek_tok.position())
}
} else if tchk_expr2.field_name !in ['Type', 'ReturnType'] {
p.error_with_pos('only the `Type` and `ReturnType` fields are supported for now',
name_pos_start)
}
}
@ -280,10 +289,17 @@ fn (mut p Parser) comp_if() ast.Stmt {
if p.tok.kind == .question {
p.next()
is_opt = true
} else if p.tok.kind == .key_is {
} else if p.tok.kind in [.key_is, .not_is] {
typecheck_inversion := p.tok.kind == .not_is
p.next()
tchk_type = p.parse_type()
is_typecheck = true
if is_not {
name := p.table.get_type_name(tchk_type)
p.error_with_pos('use `\$if $tchk_expr !is $name {`, not `\$if !$tchk_expr is $name {`',
inversion_pos)
}
is_not = typecheck_inversion
}
if !skip {
stmts = p.parse_block()

21
vlib/v/tests/comptime_for_test.v
View File

@ -28,11 +28,14 @@ fn (mut app App) int_method2() int {
return 1
}
fn (mut app App) string_arg(x string) {
}
fn no_lines(s string) string { return s.replace('\n', ' ') }
fn test_comptime_for() {
println(@FN)
methods := ['run', 'method2', 'int_method1', 'int_method2']
methods := ['run', 'method2', 'int_method1', 'int_method2', 'string_arg']
$for method in App.methods {
println(' method: $method.name | ' + no_lines('$method'))
assert method.name in methods
@ -41,12 +44,16 @@ fn test_comptime_for() {
fn test_comptime_for_with_if() {
println(@FN)
methods := ['int_method1', 'int_method2']
$for method in App.methods {
println(' method: ' + no_lines('$method'))
$if method.@type is int {
println(method.attrs)
assert method.name in methods
$if method.Type is fn() {
assert method.name in ['run', 'method2']
}
$if method.ReturnType is int {
assert method.name in ['int_method1', 'int_method2']
}
$if method.args[0].Type is string {
assert method.name == 'string_arg'
}
}
}
@ -55,10 +62,10 @@ fn test_comptime_for_fields() {
println(@FN)
$for field in App.fields {
println(' field: $field.name | ' + no_lines('$field'))
$if field.@type is string {
$if field.Type is string {
assert field.name in ['a', 'b', 'g']
}
$if field.@type is f32 {
$if field.Type is f32 {
assert field.name in ['d', 'e']
}
if field.is_mut {

4
vlib/vweb/vweb.v
View File

@ -370,7 +370,7 @@ fn handle_conn<T>(conn net.Socket, mut app T) {
mut vars := []string{cap: route_words_a.len}
mut action := ''
$for method in T.methods {
$if method.@type is Result {
$if method.ReturnType is Result {
attrs := method.attrs
route_words_a = [][]string{}
if attrs.len == 0 {
@ -469,7 +469,7 @@ fn handle_conn<T>(conn net.Socket, mut app T) {
return
}
$for method in T.methods {
$if method.@type is Result {
$if method.ReturnType is Result {
// search again for method
if action == method.name && method.attrs.len > 0 {
// call action method