mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
604 lines
13 KiB
V
604 lines
13 KiB
V
// Copyright (c) 2019-2022 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 ast
|
||
|
||
import v.util
|
||
import strings
|
||
|
||
pub fn (node &FnDecl) modname() string {
|
||
if node.mod != '' {
|
||
return node.mod
|
||
}
|
||
mut pamod := node.name.all_before_last('.')
|
||
if pamod == node.name.after('.') {
|
||
pamod = if node.is_builtin { 'builtin' } else { 'main' }
|
||
}
|
||
return pamod
|
||
}
|
||
|
||
// fkey returns a unique name of the function/method.
|
||
// it is used in table.used_fns and v.markused.
|
||
pub fn (node &FnDecl) fkey() string {
|
||
if node.is_method {
|
||
return '${int(node.receiver.typ)}.$node.name'
|
||
}
|
||
return node.name
|
||
}
|
||
|
||
pub fn (node &Fn) fkey() string {
|
||
if node.is_method {
|
||
return '${int(node.receiver_type)}.$node.name'
|
||
}
|
||
return node.name
|
||
}
|
||
|
||
pub fn (node &CallExpr) fkey() string {
|
||
if node.is_method {
|
||
return '${int(node.receiver_type)}.$node.name'
|
||
}
|
||
return node.name
|
||
}
|
||
|
||
// These methods are used only by vfmt, vdoc, and for debugging.
|
||
pub fn (node &AnonFn) stringify(t &Table, cur_mod string, m2a map[string]string) string {
|
||
mut f := strings.new_builder(30)
|
||
f.write_string('fn ')
|
||
if node.inherited_vars.len > 0 {
|
||
f.write_string('[')
|
||
for i, var in node.inherited_vars {
|
||
if i > 0 {
|
||
f.write_string(', ')
|
||
}
|
||
if var.is_mut {
|
||
f.write_string('mut ')
|
||
}
|
||
f.write_string(var.name)
|
||
}
|
||
f.write_string('] ')
|
||
}
|
||
stringify_fn_after_name(node.decl, mut f, t, cur_mod, m2a)
|
||
return f.str()
|
||
}
|
||
|
||
pub fn (node &FnDecl) stringify(t &Table, cur_mod string, m2a map[string]string) string {
|
||
mut f := strings.new_builder(30)
|
||
if node.is_pub {
|
||
f.write_string('pub ')
|
||
}
|
||
f.write_string('fn ')
|
||
if node.is_method {
|
||
f.write_string('(')
|
||
mut styp := util.no_cur_mod(t.type_to_code(node.receiver.typ.clear_flag(.shared_f)),
|
||
cur_mod)
|
||
if node.rec_mut {
|
||
f.write_string(node.receiver.typ.share().str() + ' ')
|
||
styp = styp[1..] // remove &
|
||
}
|
||
f.write_string(node.receiver.name + ' ')
|
||
styp = util.no_cur_mod(styp, cur_mod)
|
||
if node.params[0].is_auto_rec {
|
||
styp = styp.trim('&')
|
||
}
|
||
f.write_string(styp + ') ')
|
||
}
|
||
name := if !node.is_method && node.language == .v {
|
||
node.name.all_after_last('.')
|
||
} else {
|
||
node.name
|
||
}
|
||
f.write_string(name)
|
||
if name in ['+', '-', '*', '/', '%', '<', '>', '==', '!=', '>=', '<='] {
|
||
f.write_string(' ')
|
||
}
|
||
stringify_fn_after_name(node, mut f, t, cur_mod, m2a)
|
||
return f.str()
|
||
}
|
||
|
||
fn stringify_fn_after_name(node &FnDecl, mut f strings.Builder, t &Table, cur_mod string, m2a map[string]string) {
|
||
mut add_para_types := true
|
||
if node.generic_names.len > 0 {
|
||
if node.is_method {
|
||
sym := t.sym(node.params[0].typ)
|
||
if sym.info is Struct {
|
||
generic_names := sym.info.generic_types.map(t.sym(it).name)
|
||
if generic_names == node.generic_names {
|
||
add_para_types = false
|
||
}
|
||
}
|
||
}
|
||
if add_para_types {
|
||
f.write_string('<')
|
||
for i, gname in node.generic_names {
|
||
is_last := i == node.generic_names.len - 1
|
||
f.write_string(gname)
|
||
if !is_last {
|
||
f.write_string(', ')
|
||
}
|
||
}
|
||
f.write_string('>')
|
||
}
|
||
}
|
||
f.write_string('(')
|
||
for i, arg in node.params {
|
||
// skip receiver
|
||
// if (node.is_method || node.is_interface) && i == 0 {
|
||
if node.is_method && i == 0 {
|
||
continue
|
||
}
|
||
if arg.is_hidden {
|
||
continue
|
||
}
|
||
is_last_arg := i == node.params.len - 1
|
||
is_type_only := arg.name == ''
|
||
should_add_type := true // is_last_arg || is_type_only || node.params[i + 1].typ != arg.typ ||
|
||
// (node.is_variadic && i == node.params.len - 2)
|
||
if arg.is_mut {
|
||
f.write_string(arg.typ.share().str() + ' ')
|
||
}
|
||
f.write_string(arg.name)
|
||
mut s := t.type_to_str(arg.typ.clear_flag(.shared_f))
|
||
if arg.is_mut {
|
||
arg_sym := t.sym(arg.typ)
|
||
if s.starts_with('&') && ((!arg_sym.is_number() && arg_sym.kind != .bool)
|
||
|| node.language != .v) {
|
||
s = s[1..]
|
||
}
|
||
}
|
||
s = util.no_cur_mod(s, cur_mod)
|
||
for mod, alias in m2a {
|
||
s = s.replace(mod, alias)
|
||
}
|
||
if should_add_type {
|
||
if !is_type_only {
|
||
f.write_string(' ')
|
||
}
|
||
if node.is_variadic && is_last_arg {
|
||
f.write_string('...')
|
||
}
|
||
f.write_string(s)
|
||
}
|
||
if !is_last_arg {
|
||
f.write_string(', ')
|
||
}
|
||
}
|
||
f.write_string(')')
|
||
if node.return_type != void_type {
|
||
mut rs := util.no_cur_mod(t.type_to_str(node.return_type), cur_mod)
|
||
for mod, alias in m2a {
|
||
rs = rs.replace(mod, alias)
|
||
}
|
||
f.write_string(' ' + rs)
|
||
}
|
||
}
|
||
|
||
// Expressions in string interpolations may have to be put in braces if they
|
||
// are non-trivial, if they would interfere with the next character or if a
|
||
// format specification is given. In the latter case
|
||
// the format specifier must be appended, separated by a colon:
|
||
// '$z $z.b $z.c.x ${x[4]} ${z:8.3f} ${a:-20} ${a>b+2}'
|
||
// This method creates the format specifier (including the colon) or an empty
|
||
// string if none is needed and also returns (as bool) if the expression
|
||
// must be enclosed in braces.
|
||
pub fn (lit &StringInterLiteral) get_fspec_braces(i int) (string, bool) {
|
||
mut res := []string{}
|
||
needs_fspec := lit.need_fmts[i] || lit.pluss[i]
|
||
|| (lit.fills[i] && lit.fwidths[i] >= 0) || lit.fwidths[i] != 0
|
||
|| lit.precisions[i] != 987698
|
||
mut needs_braces := needs_fspec
|
||
sx := lit.exprs[i].str()
|
||
if sx.contains(r'"') || sx.contains(r"'") {
|
||
needs_braces = true
|
||
}
|
||
if !needs_braces {
|
||
if i + 1 < lit.vals.len && lit.vals[i + 1].len > 0 {
|
||
next_char := lit.vals[i + 1][0]
|
||
if util.is_func_char(next_char) || next_char == `.` || next_char == `(` {
|
||
needs_braces = true
|
||
}
|
||
}
|
||
}
|
||
if !needs_braces {
|
||
mut sub_expr := lit.exprs[i]
|
||
for {
|
||
match mut sub_expr {
|
||
Ident {
|
||
if sub_expr.name[0] == `@` {
|
||
needs_braces = true
|
||
}
|
||
break
|
||
}
|
||
CallExpr {
|
||
if sub_expr.args.len != 0 || sub_expr.concrete_types.len != 0 {
|
||
needs_braces = true
|
||
} else if sub_expr.left is CallExpr {
|
||
sub_expr = sub_expr.left
|
||
continue
|
||
} else if sub_expr.left is CastExpr || sub_expr.left is IndexExpr {
|
||
needs_braces = true
|
||
}
|
||
break
|
||
}
|
||
SelectorExpr {
|
||
if sub_expr.field_name[0] == `@` {
|
||
needs_braces = true
|
||
break
|
||
}
|
||
sub_expr = sub_expr.expr
|
||
continue
|
||
}
|
||
else {
|
||
needs_braces = true
|
||
break
|
||
}
|
||
}
|
||
}
|
||
}
|
||
if needs_fspec {
|
||
res << ':'
|
||
if lit.pluss[i] {
|
||
res << '+'
|
||
}
|
||
if lit.fills[i] && lit.fwidths[i] >= 0 {
|
||
res << '0'
|
||
}
|
||
if lit.fwidths[i] != 0 {
|
||
res << '${lit.fwidths[i]}'
|
||
}
|
||
if lit.precisions[i] != 987698 {
|
||
res << '.${lit.precisions[i]}'
|
||
}
|
||
if lit.need_fmts[i] {
|
||
res << '${lit.fmts[i]:c}'
|
||
}
|
||
}
|
||
return res.join(''), needs_braces
|
||
}
|
||
|
||
// string representation of expr
|
||
pub fn (x Expr) str() string {
|
||
match x {
|
||
AnonFn {
|
||
return 'anon_fn'
|
||
}
|
||
DumpExpr {
|
||
return 'dump($x.expr.str())'
|
||
}
|
||
ArrayInit {
|
||
mut fields := []string{}
|
||
if x.has_len {
|
||
fields << 'len: $x.len_expr.str()'
|
||
}
|
||
if x.has_cap {
|
||
fields << 'cap: $x.cap_expr.str()'
|
||
}
|
||
if x.has_default {
|
||
fields << 'init: $x.default_expr.str()'
|
||
}
|
||
if fields.len > 0 {
|
||
return '[]T{${fields.join(', ')}}'
|
||
} else {
|
||
return x.exprs.str()
|
||
}
|
||
}
|
||
AsCast {
|
||
return '$x.expr.str() as ${global_table.type_to_str(x.typ)}'
|
||
}
|
||
AtExpr {
|
||
return '$x.val'
|
||
}
|
||
CTempVar {
|
||
return x.orig.str()
|
||
}
|
||
BoolLiteral {
|
||
return x.val.str()
|
||
}
|
||
CastExpr {
|
||
return '${x.typname}($x.expr.str())'
|
||
}
|
||
CallExpr {
|
||
sargs := args2str(x.args)
|
||
propagate_suffix := if x.or_block.kind == .propagate { ' ?' } else { '' }
|
||
if x.is_method {
|
||
return '${x.left.str()}.${x.name}($sargs)$propagate_suffix'
|
||
}
|
||
if x.name.starts_with('${x.mod}.') {
|
||
return util.strip_main_name('${x.name}($sargs)$propagate_suffix')
|
||
}
|
||
if x.mod == '' && x.name == '' {
|
||
return x.left.str() + '($sargs)$propagate_suffix'
|
||
}
|
||
return '${x.mod}.${x.name}($sargs)$propagate_suffix'
|
||
}
|
||
CharLiteral {
|
||
return '`$x.val`'
|
||
}
|
||
Comment {
|
||
if x.is_multi {
|
||
lines := x.text.split_into_lines()
|
||
return '/* $lines.len lines comment */'
|
||
} else {
|
||
text := x.text.trim('\x01').trim_space()
|
||
return '´// $text´'
|
||
}
|
||
}
|
||
ComptimeSelector {
|
||
return '${x.left}.$$x.field_expr'
|
||
}
|
||
ConcatExpr {
|
||
return x.vals.map(it.str()).join(',')
|
||
}
|
||
EnumVal {
|
||
return '.$x.val'
|
||
}
|
||
FloatLiteral, IntegerLiteral {
|
||
return x.val
|
||
}
|
||
GoExpr {
|
||
return 'go $x.call_expr'
|
||
}
|
||
Ident {
|
||
return x.name
|
||
}
|
||
IfExpr {
|
||
mut parts := []string{}
|
||
dollar := if x.is_comptime { '$' } else { '' }
|
||
for i, branch in x.branches {
|
||
if i != 0 {
|
||
parts << ' } ${dollar}else '
|
||
}
|
||
if i < x.branches.len - 1 || !x.has_else {
|
||
parts << ' ${dollar}if ' + branch.cond.str() + ' { '
|
||
}
|
||
for stmt in branch.stmts {
|
||
parts << stmt.str()
|
||
}
|
||
}
|
||
parts << ' }'
|
||
return parts.join('')
|
||
}
|
||
IndexExpr {
|
||
return '$x.left.str()[$x.index.str()]'
|
||
}
|
||
InfixExpr {
|
||
return '$x.left.str() $x.op.str() $x.right.str()'
|
||
}
|
||
MapInit {
|
||
mut pairs := []string{}
|
||
for ik, kv in x.keys {
|
||
mv := x.vals[ik].str()
|
||
pairs << '$kv: $mv'
|
||
}
|
||
return 'map{ ${pairs.join(' ')} }'
|
||
}
|
||
ParExpr {
|
||
return '($x.expr)'
|
||
}
|
||
PostfixExpr {
|
||
if x.op == .question {
|
||
return '$x.expr ?'
|
||
}
|
||
return '$x.expr$x.op'
|
||
}
|
||
PrefixExpr {
|
||
return x.op.str() + x.right.str()
|
||
}
|
||
RangeExpr {
|
||
mut s := '..'
|
||
if x.has_low {
|
||
s = '$x.low ' + s
|
||
}
|
||
if x.has_high {
|
||
s = s + ' $x.high'
|
||
}
|
||
return s
|
||
}
|
||
SelectExpr {
|
||
return 'ast.SelectExpr'
|
||
}
|
||
SelectorExpr {
|
||
return '${x.expr.str()}.$x.field_name'
|
||
}
|
||
SizeOf {
|
||
if x.is_type {
|
||
return 'sizeof(${global_table.type_to_str(x.typ)})'
|
||
}
|
||
return 'sizeof($x.expr)'
|
||
}
|
||
OffsetOf {
|
||
return '__offsetof(${global_table.type_to_str(x.struct_type)}, $x.field)'
|
||
}
|
||
StringInterLiteral {
|
||
mut res := strings.new_builder(50)
|
||
res.write_string("'")
|
||
for i, val in x.vals {
|
||
res.write_string(val)
|
||
if i >= x.exprs.len {
|
||
break
|
||
}
|
||
res.write_string('$')
|
||
fspec_str, needs_braces := x.get_fspec_braces(i)
|
||
if needs_braces {
|
||
res.write_string('{')
|
||
res.write_string(x.exprs[i].str())
|
||
res.write_string(fspec_str)
|
||
res.write_string('}')
|
||
} else {
|
||
res.write_string(x.exprs[i].str())
|
||
}
|
||
}
|
||
res.write_string("'")
|
||
return res.str()
|
||
}
|
||
StringLiteral {
|
||
return "'$x.val'"
|
||
}
|
||
TypeNode {
|
||
return 'TypeNode($x.typ)'
|
||
}
|
||
TypeOf {
|
||
return 'typeof($x.expr.str())'
|
||
}
|
||
Likely {
|
||
return '_likely_($x.expr.str())'
|
||
}
|
||
UnsafeExpr {
|
||
return 'unsafe { $x.expr }'
|
||
}
|
||
None {
|
||
return 'none'
|
||
}
|
||
IsRefType {
|
||
return 'isreftype(' + if x.is_type {
|
||
global_table.type_to_str(x.typ)
|
||
} else {
|
||
x.expr.str()
|
||
} + ')'
|
||
}
|
||
IfGuardExpr {
|
||
mut s := ''
|
||
for i, var in x.vars {
|
||
s += var.name
|
||
if i != x.vars.len - 1 {
|
||
s += ', '
|
||
}
|
||
}
|
||
return s + ' := ' + x.expr.str()
|
||
}
|
||
StructInit {
|
||
sname := global_table.sym(x.typ).name
|
||
return '$sname{....}'
|
||
}
|
||
ArrayDecompose {
|
||
return 'ast.ArrayDecompose'
|
||
}
|
||
Assoc {
|
||
return 'ast.Assoc'
|
||
}
|
||
ChanInit {
|
||
return 'ast.ChanInit'
|
||
}
|
||
ComptimeCall {
|
||
return 'ast.ComptimeCall'
|
||
}
|
||
EmptyExpr {
|
||
return 'ast.EmptyExpr'
|
||
}
|
||
LockExpr {
|
||
return 'ast.LockExpr'
|
||
}
|
||
MatchExpr {
|
||
return 'ast.MatchExpr'
|
||
}
|
||
NodeError {
|
||
return 'ast.NodeError'
|
||
}
|
||
OrExpr {
|
||
return 'ast.OrExpr'
|
||
}
|
||
SqlExpr {
|
||
return 'ast.SqlExpr'
|
||
}
|
||
}
|
||
return '[unhandled expr type $x.type_name()]'
|
||
}
|
||
|
||
pub fn (a CallArg) str() string {
|
||
if a.is_mut {
|
||
return 'mut $a.expr.str()'
|
||
}
|
||
return '$a.expr.str()'
|
||
}
|
||
|
||
pub fn args2str(args []CallArg) string {
|
||
mut res := []string{}
|
||
for a in args {
|
||
res << a.str()
|
||
}
|
||
return res.join(', ')
|
||
}
|
||
|
||
pub fn (node &BranchStmt) str() string {
|
||
mut s := '$node.kind'
|
||
if node.label.len > 0 {
|
||
s += ' $node.label'
|
||
}
|
||
return s
|
||
}
|
||
|
||
pub fn (node Stmt) str() string {
|
||
match node {
|
||
AssertStmt {
|
||
return 'assert $node.expr'
|
||
}
|
||
AssignStmt {
|
||
mut out := ''
|
||
for i, left in node.left {
|
||
if left is Ident {
|
||
var_info := left.var_info()
|
||
if var_info.is_mut {
|
||
out += 'mut '
|
||
}
|
||
}
|
||
out += left.str()
|
||
if i < node.left.len - 1 {
|
||
out += ','
|
||
}
|
||
}
|
||
out += ' $node.op.str() '
|
||
for i, val in node.right {
|
||
out += val.str()
|
||
if i < node.right.len - 1 {
|
||
out += ','
|
||
}
|
||
}
|
||
return out
|
||
}
|
||
BranchStmt {
|
||
return node.str()
|
||
}
|
||
ConstDecl {
|
||
fields := node.fields.map(field_to_string)
|
||
return 'const (${fields.join(' ')})'
|
||
}
|
||
ExprStmt {
|
||
return node.expr.str()
|
||
}
|
||
FnDecl {
|
||
return 'fn ${node.name}( $node.params.len params ) { $node.stmts.len stmts }'
|
||
}
|
||
EnumDecl {
|
||
return 'enum $node.name { $node.fields.len fields }'
|
||
}
|
||
Module {
|
||
return 'module $node.name'
|
||
}
|
||
Import {
|
||
mut out := 'import $node.mod'
|
||
if node.alias.len > 0 {
|
||
out += ' as $node.alias'
|
||
}
|
||
return out
|
||
}
|
||
StructDecl {
|
||
return 'struct $node.name { $node.fields.len fields }'
|
||
}
|
||
else {
|
||
return '[unhandled stmt str type: $node.type_name() ]'
|
||
}
|
||
}
|
||
}
|
||
|
||
fn field_to_string(f ConstField) string {
|
||
x := f.name.trim_string_left(f.mod + '.')
|
||
return '$x = $f.expr'
|
||
}
|
||
|
||
pub fn (e ComptimeForKind) str() string {
|
||
match e {
|
||
.methods { return 'methods' }
|
||
.fields { return 'fields' }
|
||
.attributes { return 'attributes' }
|
||
}
|
||
}
|