v.ast #

fn all_registers(mut t Table, arch pref.Arch) map[string]ScopeObject

return all the registers for the given architecture

fn args2str(args []CallArg) string

fn empty_comptime_const_expr() ComptTimeConstValue

| int

fn merge_types(params ...[]Type) []Type

fn mktyp(typ Type) Type

fn new_table() &Table

fn new_type(idx int) Type

return new type with TypeSymbol idx set to idx

fn new_type_ptr(idx int, nr_muls int) Type

return new type with TypeSymbol idx set to idx & nr_muls set to nr_muls

fn pref_arch_to_table_language(pref_arch pref.Arch) Language

pref_arch_to_table_language returns target language based on pref_arch

fn sharetype_from_flags(is_shared bool, is_atomic bool) ShareType

fn type_can_start_with_token(tok &token.Token) bool

fn (attrs []Attr) contains(str string) bool

fn (attrs []Attr) contains_arg(str string, arg string) bool

fn (attrs []Attr) find_first(aname string) ?Attr

fn (attrs []Attr) find_last(aname string) ?Attr

fn (attrs []Attr) find_comptime_define() ?int

fn (kinds []Kind) str() string

type AsmArg = AsmAddressing
	| AsmAlias
	| AsmDisp
	| AsmRegister
	| BoolLiteral
	| CharLiteral
	| FloatLiteral
	| IntegerLiteral
	| string

[eax+5] | j | displacement literal (e.g. 123 in [rax + 123] ) | eax | true | a | 0.594 | 123 | label_name

type ComptTimeConstValue = EmptyExpr
	| f32
	| f64
	| i16
	| i32
	| i64
	| i8
	| int
	| rune
	| string
	| u16
	| u32
	| u64
	| u8
	| voidptr

fn (val ComptTimeConstValue) i8() ?i8

fn (val ComptTimeConstValue) i16() ?i16

fn (val ComptTimeConstValue) int() ?int

fn (val ComptTimeConstValue) i32() ?i32

fn (val ComptTimeConstValue) voidptr() ?voidptr

fn (val ComptTimeConstValue) i64() ?i64

fn (val ComptTimeConstValue) u8() ?u8

fn (val ComptTimeConstValue) u16() ?u16

fn (val ComptTimeConstValue) u32() ?u32

fn (val ComptTimeConstValue) u64() ?u64

fn (val ComptTimeConstValue) f32() ?f32

fn (val ComptTimeConstValue) f64() ?f64

fn (val ComptTimeConstValue) string() ?string

type EmptyExpr = u8

type Expr = AnonFn
	| ArrayDecompose
	| ArrayInit
	| AsCast
	| Assoc
	| AtExpr
	| BoolLiteral
	| CTempVar
	| CallExpr
	| CastExpr
	| ChanInit
	| CharLiteral
	| Comment
	| ComptimeCall
	| ComptimeSelector
	| ComptimeType
	| ConcatExpr
	| DumpExpr
	| EmptyExpr
	| EnumVal
	| FloatLiteral
	| GoExpr
	| Ident
	| IfExpr
	| IfGuardExpr
	| IndexExpr
	| InfixExpr
	| IntegerLiteral
	| IsRefType
	| LambdaExpr
	| Likely
	| LockExpr
	| MapInit
	| MatchExpr
	| Nil
	| NodeError
	| None
	| OffsetOf
	| OrExpr
	| ParExpr
	| PostfixExpr
	| PrefixExpr
	| RangeExpr
	| SelectExpr
	| SelectorExpr
	| SizeOf
	| SpawnExpr
	| SqlExpr
	| StringInterLiteral
	| StringLiteral
	| StructInit
	| TypeNode
	| TypeOf
	| UnsafeExpr

fn (expr Expr) get_pure_type() Type

fn (e &Expr) has_fn_call() bool

returns if an expression has call expr`

fn (expr Expr) is_auto_deref_var() bool

fn (expr Expr) is_blank_ident() bool

fn (expr Expr) is_expr() bool

fn (expr Expr) is_literal() bool

is expr a literal, i.e. it does not depend on any other declarations (C compile time constant)

fn (e &Expr) is_lockable() bool

returns if an expression can be used in lock x, y.z {

fn (expr Expr) is_lvalue() bool

fn (e Expr) is_nil() bool

fn (expr Expr) is_pure_literal() bool

fn (expr Expr) pos() token.Pos

fn (x Expr) str() string

string representation of expr

type FnPanicHandler = fn (&Table, string)

type IdentInfo = IdentFn | IdentVar

type Node = CallArg
	| ConstField
	| EmptyNode
	| EnumField
	| Expr
	| File
	| GlobalField
	| IfBranch
	| MatchBranch
	| NodeError
	| Param
	| ScopeObject
	| SelectBranch
	| Stmt
	| StructField
	| StructInitField

Todo: replace Param

fn (node Node) pos() token.Pos

fn (node Node) children() []Node

type ScopeObject = AsmRegister | ConstField | GlobalField | Var

fn (obj ScopeObject) is_simple_define_const() bool

type Stmt = AsmStmt
	| AssertStmt
	| AssignStmt
	| Block
	| BranchStmt
	| ComptimeFor
	| ConstDecl
	| DeferStmt
	| EmptyStmt
	| EnumDecl
	| ExprStmt
	| FnDecl
	| ForCStmt
	| ForInStmt
	| ForStmt
	| GlobalDecl
	| GotoLabel
	| GotoStmt
	| HashStmt
	| Import
	| InterfaceDecl
	| Module
	| NodeError
	| Return
	| SemicolonStmt
	| SqlStmt
	| StructDecl
	| TypeDecl

fn (node Stmt) str() string

type Type = int

fn (t Type) atomic_typename() string

<atomic.h> defines special typenames

fn (t Type) share() ShareType

fn (t Type) idx() int

return TypeSymbol idx for t

fn (t Type) is_void() bool

is_void return true if t is of type void

fn (t Type) is_full() bool

is_full return true if t is not of type void

fn (t Type) nr_muls() int

return nr_muls for t

fn (t Type) is_ptr() bool

return true if t is a pointer (nr_muls>0)

fn (typ Type) is_pointer() bool

is_pointer returns true if typ is any of the builtin pointer types (voidptr, byteptr, charptr)

fn (typ Type) is_voidptr() bool

is_voidptr returns true if typ is a voidptr

fn (t Type) is_any_kind_of_pointer() bool

is_any_kind_of_pointer returns true if t is any type of pointer

fn (t Type) set_nr_muls(nr_muls int) Type

set nr_muls on t and return it

fn (t Type) ref() Type

increments nr_muls on t and return it

fn (t Type) deref() Type

decrement nr_muls on t and return it

fn (t Type) set_flag(flag TypeFlag) Type

set flag on t and return t

fn (t Type) clear_flag(flag TypeFlag) Type

clear flag on t and return t

fn (t Type) clear_flags(flags ...TypeFlag) Type

clear all flags or multi flags

fn (t Type) has_flag(flag TypeFlag) bool

return true if flag is set on t

fn (t Type) str() string

fn (t Type) debug() []string

debug returns a verbose representation of the information in the type t, useful for tracing/debugging

fn (t Type) derive(t_from Type) Type

copy flags & nr_muls from t_from to t and return t

fn (t Type) derive_add_muls(t_from Type) Type

copy flags from t_from to t and return t

fn (typ Type) is_float() bool

fn (typ Type) is_int() bool

fn (typ Type) is_int_valptr() bool

fn (typ Type) is_float_valptr() bool

fn (typ Type) is_pure_int() bool

fn (typ Type) is_pure_float() bool

fn (typ Type) is_signed() bool

fn (typ Type) is_unsigned() bool

fn (typ Type) flip_signedness() Type

fn (typ Type) is_int_literal() bool

fn (typ Type) is_number() bool

fn (typ Type) is_string() bool

fn (typ Type) is_bool() bool

type TypeDecl = AliasTypeDecl | FnTypeDecl | SumTypeDecl

type TypeInfo = Aggregate
	| Alias
	| Array
	| ArrayFixed
	| Chan
	| Enum
	| FnType
	| GenericInst
	| Interface
	| Map
	| MultiReturn
	| Struct
	| SumType
	| Thread

enum AddressingMode {
	invalid
	displacement // displacement
	base // base
	base_plus_displacement // base + displacement
	index_times_scale_plus_displacement // (index ∗ scale) + displacement
	base_plus_index_plus_displacement // base + (index ∗ scale) + displacement
	base_plus_index_times_scale_plus_displacement // base + index + displacement
	rip_plus_displacement // rip + displacement
}

addressing modes:

enum AttrKind {
	plain // [name]
	string // ['name']
	number // [123]
	bool // [true] || [false]
	comptime_define // [if name]
}

enum ComptimeForKind {
	methods
	fields
	attributes
	values
}

fn (e ComptimeForKind) str() string

enum ComptimeTypeKind {
	unknown
	map_
	int
	float
	struct_
	iface
	array
	array_fixed
	array_dynamic
	sum_type
	enum_
	alias
	function
	option
}

enum ComptimeVarKind {
	no_comptime // it is not a comptime var
	key_var // map key from `for k,v in t.$(field.name)`
	value_var // map value from `for k,v in t.$(field.name)`
	field_var // comptime field var `a := t.$(field.name)`
	generic_param // generic fn parameter
}

enum GenericKindField {
	unknown
	name
	typ
}

enum IdentKind {
	unresolved
	blank_ident
	variable
	constant
	global
	function
}

enum Kind {
	placeholder
	void
	voidptr
	byteptr
	charptr
	i8
	i16
	i32
	int
	i64
	isize
	u8
	u16
	u32
	u64
	usize
	f32
	f64
	char
	rune
	bool
	none_
	string
	array
	array_fixed
	map
	chan
	any
	struct_
	generic_inst
	multi_return
	sum_type
	alias
	enum_
	function
	interface_
	float_literal
	int_literal
	aggregate
	thread
}

fn (k Kind) str() string

for debugging/errors only, perf is not an issue

enum Language {
	v
	c
	js
	wasm
	amd64 // aka x86_64
	i386
	arm64 // 64-bit arm
	arm32 // 32-bit arm
	rv64 // 64-bit risc-v
	rv32 // 32-bit risc-v
	wasm32
}

enum OrKind {
	absent
	block
	propagate_option
	propagate_result
}

enum ShareType {
	mut_t
	shared_t
	atomic_t
}

fn (t ShareType) str() string

str converts t to it's string form of ShareType i.e. mut, shared, atomic

enum SqlStmtKind {
	insert
	update
	delete
	create
	drop
}

enum StructInitKind {
	normal
	short_syntax
	anon
}

enum TypeFlag {
	option
	result
	variadic
	generic
	shared_f
	atomic_f
}

max of 8

struct Aggregate {
mut:
	fields []StructField // used for faster lookup inside the module
pub:
	sum_type Type
	types    []Type
}

struct Alias {
pub:
	parent_type Type
	language    Language
	is_import   bool
}

struct AliasTypeDecl {
pub:
	name        string
	is_pub      bool
	typ         Type
	parent_type Type
	pos         token.Pos
	type_pos    token.Pos
	comments    []Comment
}

struct AnonFn {
pub mut:
	decl           FnDecl
	inherited_vars []Param
	typ            Type // the type of anonymous fn. Both .typ and .decl.name are auto generated
	has_gen        map[string]bool // a map of the names of all generic anon functions, generated from it
}

anonymous function

struct Array {
pub:
	nr_dims int
pub mut:
	elem_type Type
}

struct ArrayDecompose {
pub:
	pos token.Pos
pub mut:
	expr      Expr
	expr_type Type
	arg_type  Type
}

struct ArrayFixed {
pub:
	size      int
	size_expr Expr // used by fmt for e.g. ´[my_const]u8´
pub mut:
	elem_type Type
	is_fn_ret bool
}

fn (t &ArrayFixed) is_compatible(t2 ArrayFixed) bool

struct ArrayInit {
pub:
	pos           token.Pos   // `[]` in []Type{} position
	elem_type_pos token.Pos   // `Type` in []Type{} position
	ecmnts        [][]Comment // optional iembed comments after each expr
	pre_cmnts     []Comment
	is_fixed      bool
	has_val       bool // fixed size literal `[expr, expr]!`
	mod           string
	has_len       bool
	has_cap       bool
	has_init      bool
	has_index     bool // true if temp variable index is used
pub mut:
	exprs      []Expr // `[expr, expr]` or `[expr]Type{}` for fixed array
	len_expr   Expr   // len: expr
	cap_expr   Expr   // cap: expr
	init_expr  Expr   // init: expr
	expr_types []Type // [Dog, Cat] // also used for interface_types
	elem_type  Type   // element type
	init_type  Type   // init: value type
	typ        Type   // array type
}

struct AsCast {
pub:
	typ Type // to type
	pos token.Pos
pub mut:
	expr      Expr // from expr: `expr` in `expr as Ident`
	expr_type Type // from type
}

expr as Ident

struct AsmAddressing {
pub:
	scale int = -1 // 1, 2, 4, or 8 literal
	mode  AddressingMode
	pos   token.Pos
pub mut:
	segment      string // fs:
	displacement AsmArg // 8, 16 or 32 bit literal value
	base         AsmArg // gpr
	index        AsmArg // gpr
}

struct AsmAlias {
pub:
	pos token.Pos
pub mut:
	name string // a
}

struct AsmClobbered {
pub mut:
	reg      AsmRegister
	comments []Comment
}

struct AsmDisp {
pub:
	val string
	pos token.Pos
}

struct AsmIO {
pub:
	alias      string    // [alias_a]
	constraint string    // '=r' TODO: allow all backends to easily use this with a struct
	comments   []Comment // // this is a comment
	typ        Type
	pos        token.Pos
pub mut:
	expr Expr // (a)
}

: [alias_a] '=r' (a) // this is a comment

struct AsmRegister {
pub mut:
	name string // eax or r12d etc.
	typ  Type
	size int
}

struct AsmStmt {
pub:
	arch        pref.Arch
	is_basic    bool
	is_volatile bool
	is_goto     bool
	clobbered   []AsmClobbered
	pos         token.Pos
pub mut:
	templates     []AsmTemplate
	scope         &Scope = unsafe { nil }
	output        []AsmIO
	input         []AsmIO
	global_labels []string // labels defined in assembly block, exported with `.globl`
	local_labels  []string // local to the assembly block
}

struct AsmTemplate {
pub mut:
	name         string
	is_label     bool // `example_label:`
	is_directive bool // .globl assembly_function
	args         []AsmArg
	comments     []Comment
	pos          token.Pos
}

struct AssertStmt {
pub:
	pos       token.Pos
	extra_pos token.Pos
pub mut:
	expr    Expr // `a == 0`
	extra   Expr // `'a is zero'`
	is_used bool // asserts are used in _test.v files, as well as in non -prod builds of all files
}

assert a == 0, 'a is zero'

struct AssignStmt {
pub:
	op           token.Kind // include: =,:=,+=,-=,*=,/= and so on; for a list of all the assign operators, see vlib/token/token.v
	pos          token.Pos
	end_comments []Comment
pub mut:
	right         []Expr
	left          []Expr
	left_types    []Type
	right_types   []Type
	is_static     bool // for translated code only
	is_volatile   bool // for disabling variable access optimisations (needed for hardware drivers)
	is_simple     bool // `x+=2` in `for x:=1; ; x+=2`
	has_cross_var bool
}

variable assign statement

struct Assoc {
pub:
	var_name string
	fields   []string
	pos      token.Pos
pub mut:
	exprs []Expr
	typ   Type
	scope &Scope = unsafe { nil }
}

deprecated

struct AtExpr {
pub:
	name string
	pos  token.Pos
	kind token.AtKind
pub mut:
	val string
}

@FN, @STRUCT, @MOD etc. See full list in token.valid_at_tokens

struct Attr {
pub:
	name    string // [name]
	has_arg bool
	arg     string // [name: arg]
	kind    AttrKind
	ct_opt  bool // true for [if user_defined_name?]
	pos     token.Pos
	has_at  bool // new syntax `@[attr]`
pub mut:
	ct_expr   Expr // .kind == comptime_define, for [if !name]
	ct_evaled bool // whether ct_skip has been evaluated already
	ct_skip   bool // is the comptime expr *false*, filled by checker
}

e.g. [unsafe]

fn (a Attr) debug() string

fn (a Attr) str() string

str returns the string representation without square brackets

struct Block {
pub:
	is_unsafe bool
	pos       token.Pos
pub mut:
	stmts []Stmt
}

{stmts} or unsafe {stmts}

struct BoolLiteral {
pub:
	val bool
	pos token.Pos
}

struct BranchStmt {
pub:
	kind  token.Kind
	label string
	pos   token.Pos
}

break, continue

fn (node &BranchStmt) str() string

struct CallArg {
pub:
	is_mut   bool
	share    ShareType
	comments []Comment
pub mut:
	expr            Expr
	typ             Type
	is_tmp_autofree bool // this tells cgen that a tmp variable has to be used for the arg expression in order to free it after the call
	pos             token.Pos
	// tmp_name        string // for autofree
}

function call argument: f(callarg)

fn (a CallArg) str() string

struct CallExpr {
pub:
	pos      token.Pos
	name_pos token.Pos
	mod      string
pub mut:
	name               string // left.name()
	is_method          bool
	is_field           bool // temp hack, remove ASAP when re-impl CallExpr / Selector (joe)
	is_fn_var          bool // fn variable, `a := fn() {}`, then: `a()`
	is_fn_a_const      bool // fn const, `const c = abc`, where `abc` is a function, then: `c()`
	is_keep_alive      bool // GC must not free arguments before fn returns
	is_noreturn        bool // whether the function/method is marked as [noreturn]
	is_ctor_new        bool // if JS ctor calls requires `new` before call, marked as `[use_new]` in V
	is_file_translated bool // true, when the file it resides in is `[translated]`
	args               []CallArg
	expected_arg_types []Type
	comptime_ret_val   bool
	language           Language
	or_block           OrExpr
	left               Expr // `user` in `user.register()`
	left_type          Type // type of `user`
	receiver_type      Type // User
	return_type        Type
	fn_var_type        Type   // the fn type, when `is_fn_a_const` or `is_fn_var` is true
	const_name         string // the fully qualified name of the const, i.e. `main.c`, given `const c = abc`, and callexpr: `c()`
	should_be_skipped  bool   // true for calls to `[if someflag?]` functions, when there is no `-d someflag`
	concrete_types     []Type // concrete types, e.g. 
	concrete_list_pos  token.Pos
	raw_concrete_types []Type
	free_receiver      bool // true if the receiver expression needs to be freed
	scope              &Scope = unsafe { nil }
	from_embed_types   []Type // holds the type of the embed that the method is called from
	comments           []Comment
}

function or method call expr

fn (node &CallExpr) fkey() string

fn (f &CallExpr) get_name() string

get_name returns the real name for the function calling

struct CastExpr {
pub mut:
	arg       Expr   // `n` in `string(buf, n)`
	typ       Type   // `string`
	expr      Expr   // `buf` in `string(buf, n)` and `&Type(buf)`
	typname   string // `&Type` in `&Type(buf)`
	expr_type Type   // `byteptr`, the type of the `buf` expression
	has_arg   bool   // true for `string(buf, n)`, false for `&Type(buf)`
	pos       token.Pos
}

struct Chan {
pub mut:
	elem_type Type
	is_mut    bool
}

struct ChanInit {
pub:
	pos           token.Pos
	elem_type_pos token.Pos
	has_cap       bool
pub mut:
	cap_expr  Expr
	typ       Type
	elem_type Type
}

struct CharLiteral {
pub:
	val string
	pos token.Pos
}

struct Comment {
pub:
	text     string
	is_multi bool // true only for /* comment */, that use many lines
	pos      token.Pos
}

struct ComptimeCall {
pub:
	pos          token.Pos
	has_parens   bool // if $() is used, for vfmt
	method_name  string
	method_pos   token.Pos
	scope        &Scope = unsafe { nil }
	is_vweb      bool
	is_embed     bool
	is_env       bool
	env_pos      token.Pos
	is_pkgconfig bool
pub mut:
	vweb_tmpl   File
	left        Expr
	left_type   Type
	result_type Type
	env_value   string
	args_var    string
	args        []CallArg
	embed_file  EmbeddedFile
	or_block    OrExpr
}

struct ComptimeFor {
pub:
	val_var string
	kind    ComptimeForKind
	pos     token.Pos
	typ_pos token.Pos
pub mut:
	stmts []Stmt
	typ   Type
}

struct ComptimeSelector {
pub:
	has_parens bool // if $() is used, for vfmt
	pos        token.Pos
pub mut:
	left       Expr
	left_type  Type
	field_expr Expr
	typ        Type
}

struct ComptimeType {
pub:
	kind ComptimeTypeKind
	pos  token.Pos
}

fn (cty ComptimeType) str() string

struct ConcatExpr {
pub:
	vals []Expr
	pos  token.Pos
pub mut:
	return_type Type
}

struct ConstDecl {
pub:
	is_pub bool
	pos    token.Pos
	attrs  []Attr // tags like `[markused]`, valid for all the consts in the list
pub mut:
	fields       []ConstField // all the const fields in the `const (...)` block
	end_comments []Comment    // comments that after last const field
	is_block     bool // const() block
}

const declaration

struct ConstField {
pub:
	mod         string
	name        string
	is_pub      bool
	is_markused bool // an explicit `[markused]` tag; the const will NOT be removed by `-skip-unused`, no matter what
	pos         token.Pos
pub mut:
	expr         Expr      // the value expr of field; everything after `=`
	typ          Type      // the type of the const field, it can be any type in V
	comments     []Comment // comments before current const field
	end_comments []Comment // comments that after const field
	// the comptime_expr_value field is filled by the checker, when it has enough
	// info to evaluate the constant at compile time
	comptime_expr_value ComptTimeConstValue = empty_comptime_const_expr()
}

const field in const declaration group

fn (obj ConstField) comptime_expr_value() ?ComptTimeConstValue

fn (obj ConstField) is_simple_define_const() bool

struct CTempVar {
pub:
	name   string // the name of the C temporary variable; used by g.expr(x)
	typ    Type   // the type of the original expression
	is_ptr bool   // whether the type is a pointer
pub mut:
	orig Expr // the original expression, which produced the C temp variable; used by x.str()
}

CTempVar is used in cgen only, to hold nodes for temporary variables

struct DeferStmt {
pub:
	pos token.Pos
pub mut:
	stmts      []Stmt
	defer_vars []Ident
	ifdef      string
	idx_in_fn  int = -1 // index in FnDecl.defer_stmts
}

Todo: handle this differentlyv1 excludes non current os ifdefs so the defer's never get added in the first place

struct DumpExpr {
pub:
	pos token.Pos
pub mut:
	expr      Expr
	expr_type Type
	cname     string // filled in the checker
}

struct Embed {
pub:
	typ      Type
	pos      token.Pos
	comments []Comment
}

struct EmbeddedFile {
pub:
	compression_type string
pub mut:
	rpath string // used in the source code, as an ID/key to the embed
	apath string // absolute path during compilation to the resource
	// these are set by gen_embed_file_init in v/gen/c/embed
	is_compressed bool
	bytes         []u8
	len           int
}

fn (e EmbeddedFile) hash() u64

struct EmptyNode {
pub:
	pos token.Pos
}

struct EmptyStmt {
pub:
	pos token.Pos
}

struct Enum {
pub:
	vals             []string
	is_flag          bool
	is_multi_allowed bool
	uses_exprs       bool
	typ              Type
	attrs            map[string][]Attr
}

struct EnumDecl {
pub:
	name             string
	is_pub           bool
	is_flag          bool        // true when the enum has [flag] tag,for bit field enum
	is_multi_allowed bool        // true when the enum has [_allow_multiple_values] tag
	comments         []Comment   // comments before the first EnumField
	fields           []EnumField // all the enum fields
	attrs            []Attr      // attributes of enum declaration
	typ              Type        // the default is `int`; can be changed by `enum Big as u64 { a = 5 }`
	typ_pos          token.Pos
	pos              token.Pos
}

enum declaration

struct EnumField {
pub:
	name          string
	pos           token.Pos
	comments      []Comment // comment after Enumfield in the same line
	next_comments []Comment // comments between current EnumField and next EnumField
	has_expr      bool      // true, when .expr has a value
	attrs         []Attr
pub mut:
	expr Expr // the value of current EnumField; 123 in `ename = 123`
}

enum field in enum declaration

struct EnumVal {
pub:
	enum_name string
	val       string
	mod       string // for full path `mod_Enum_val`
	pos       token.Pos
pub mut:
	typ Type
}

An enum value, like OS.macos or .macos

struct ExprStmt {
pub:
	pos      token.Pos
	comments []Comment
pub mut:
	expr    Expr
	is_expr bool
	typ     Type
}

| IncDecStmt k Stand-alone expression in a statement list.

struct File {
pub:
	nr_lines      int    // number of source code lines in the file (including newlines and comments)
	nr_bytes      int    // number of processed source code bytes
	mod           Module // the module of the source file (from `module xyz` at the top)
	global_scope  &Scope = unsafe { nil }
	is_test       bool // true for _test.v files
	is_generated  bool // true for `[generated] module xyz` files; turn off notices
	is_translated bool // true for `[translated] module xyz` files; turn off some checks
pub mut:
	idx              int    // index in an external container; can be used to refer to the file in a more efficient way, just by its integer index
	path             string // absolute path of the source file - '/projects/v/file.v'
	path_base        string // file name - 'file.v' (useful for tracing)
	scope            &Scope = unsafe { nil }
	stmts            []Stmt            // all the statements in the source file
	imports          []Import          // all the imports
	auto_imports     []string          // imports that were implicitly added
	embedded_files   []EmbeddedFile    // list of files to embed in the binary
	imported_symbols map[string]string // used for `import {symbol}`, it maps symbol => module.symbol
	errors           []errors.Error    // all the checker errors in the file
	warnings         []errors.Warning  // all the checker warnings in the file
	notices          []errors.Notice   // all the checker notices in the file
	generic_fns      []&FnDecl
	global_labels    []string // from `asm { .globl labelname }`
	template_paths   []string // all the .html/.md files that were processed with $tmpl
	unique_prefix    string   // a hash of the `.path` field, used for making anon fn generation unique
}

Each V source file is represented by one File structure. When the V compiler runs, the parser will fill an []File. That array is then passed to V's checker.

fn (f &File) free()

struct FloatLiteral {
pub:
	val string
	pos token.Pos
}

struct Fn {
pub:
	is_variadic           bool
	language              Language
	is_pub                bool
	is_ctor_new           bool // `[use_new] fn JS.Array.prototype.constructor()`
	is_deprecated         bool // `[deprecated] fn abc(){}`
	is_noreturn           bool // `[noreturn] fn abc(){}`
	is_unsafe             bool // `[unsafe] fn abc(){}`
	is_placeholder        bool
	is_main               bool // `fn main(){}`
	is_test               bool // `fn test_abc(){}`
	is_keep_alive         bool // passed memory must not be freed (by GC) before function returns
	is_method             bool // true for `fn (x T) name()`, and for interface declarations (which are also for methods)
	is_static_type_method bool // true for `fn Foo.bar() {}`
	no_body               bool // a pure declaration like `fn abc(x int)`; used in .vh files, C./JS. fns.
	is_file_translated    bool // true, when the file it resides in is `[translated]`
	mod                   string
	file                  string
	file_mode             Language
	pos                   token.Pos
	return_type_pos       token.Pos
pub mut:
	return_type       Type
	receiver_type     Type // != 0, when .is_method == true
	name              string
	params            []Param
	source_fn         voidptr // set in the checker, while processing fn declarations // TODO get rid of voidptr
	usages            int
	generic_names     []string
	dep_names         []string // globals or consts dependent names
	attrs             []Attr   // all fn attributes
	is_conditional    bool     // true for `[if abc]fn(){}`
	ctdefine_idx      int      // the index of the attribute, containing the compile time define [if mytag]
	from_embeded_type Type     // for interface only, fn from the embedded interface
}

fn (node &Fn) fkey() string

fn (f &Fn) new_method_with_receiver_type(new_type_ Type) Fn

struct FnDecl {
pub:
	name                  string // 'math.bits.normalize'
	short_name            string // 'normalize'
	mod                   string // 'math.bits'
	is_deprecated         bool
	is_pub                bool
	is_variadic           bool
	is_anon               bool
	is_noreturn           bool        // true, when [noreturn] is used on a fn
	is_manualfree         bool        // true, when [manualfree] is used on a fn
	is_main               bool        // true for `fn main()`
	is_test               bool        // true for `fn test_abcde() {}`, false for `fn test_abc(x int) {}`, or for fns that do not start with test_
	is_conditional        bool        // true for `[if abc] fn abc(){}`
	is_exported           bool        // true for `[export: 'exact_C_name']`
	is_keep_alive         bool        // passed memory must not be freed (by GC) before function returns
	is_unsafe             bool        // true, when [unsafe] is used on a fn
	is_markused           bool        // true, when an explicit `[markused]` tag was put on a fn; `-skip-unused` will not remove that fn
	is_file_translated    bool        // true, when the file it resides in is `[translated]`
	receiver              StructField // TODO this is not a struct field
	receiver_pos          token.Pos   // `(u User)` in `fn (u User) name()` position
	is_method             bool
	is_static_type_method bool      // true for `fn Foo.bar() {}`
	method_type_pos       token.Pos // `User` in ` fn (u User)` position
	method_idx            int
	rec_mut               bool // is receiver mutable
	rec_share             ShareType
	language              Language // V, C, JS
	file_mode             Language // whether *the file*, where a function was a '.c.v', '.js.v' etc.
	no_body               bool     // just a definition `fn C.malloc()`
	is_builtin            bool     // this function is defined in builtin/strconv
	name_pos              token.Pos
	body_pos              token.Pos // function bodys position
	file                  string
	generic_names         []string
	is_direct_arr         bool // direct array access
	attrs                 []Attr
	ctdefine_idx          int = -1 // the index in fn.attrs of `[if xyz]`, when such attribute exists
pub mut:
	idx               int // index in an external container; can be used to refer to the function in a more efficient way, just by its integer index
	params            []Param
	stmts             []Stmt
	defer_stmts       []DeferStmt
	return_type       Type
	return_type_pos   token.Pos // `string` in `fn (u User) name() string` position
	has_return        bool
	should_be_skipped bool      // true, when -skip-unused could not find any usages of that function, starting from main + other known used functions
	ninstances        int  // 0 for generic functions with no concrete instances
	has_await         bool // 'true' if this function uses JS.await

	comments      []Comment // comments *after* the header, but *before* `{`; used for InterfaceDecl
	end_comments  []Comment // comments *after* header declarations. E.g.: `fn C.C_func(x int) int // Comment`
	next_comments []Comment // comments that are one line after the decl; used for InterfaceDecl

	source_file &File  = unsafe { nil }
	scope       &Scope = unsafe { nil }
	label_names []string
	pos         token.Pos // function declaration position
}

function or method declaration

fn (node &FnDecl) fkey() string

fkey returns a unique name of the function/method. it is used in table.used_fns and v.markused.

fn (f &FnDecl) get_name() string

get_name returns the real name for the function declaration

fn (node &FnDecl) modname() string

fn (f &FnDecl) new_method_with_receiver_type(new_type_ Type) FnDecl

struct FnSignatureOpts {
	skip_receiver bool
	type_only     bool
}

struct FnType {
pub mut:
	is_anon  bool
	has_decl bool
	func     Fn
}

struct FnTypeDecl {
pub:
	name          string
	is_pub        bool
	typ           Type
	pos           token.Pos
	type_pos      token.Pos
	comments      []Comment
	generic_types []Type
	attrs         []Attr // attributes of type declaration
}

struct ForCStmt {
pub:
	has_init bool
	has_cond bool
	has_inc  bool
	is_multi bool // for a,b := 0,1; a < 10; a,b = a+b, a {...}
	pos      token.Pos
	comments []Comment
pub mut:
	init  Stmt // i := 0;
	cond  Expr // i < 10;
	inc   Stmt // i++; i += 2
	stmts []Stmt
	label string // `label: for {`
	scope &Scope = unsafe { nil }
}

struct ForInStmt {
pub:
	key_var    string
	val_var    string
	is_range   bool
	pos        token.Pos
	kv_pos     token.Pos
	comments   []Comment
	val_is_mut bool // `for mut val in vals {` means that modifying `val` will modify the array
	// and the array cannot be indexed inside the loop
pub mut:
	val_is_ref bool // `for val in &arr {` means that value of `val` will be the reference of the value in `arr`
	cond       Expr
	key_type   Type
	val_type   Type
	cond_type  Type
	high       Expr // `10` in `for i in 0..10 {`
	high_type  Type
	kind       Kind   // array/map/string
	label      string // `label: for {`
	scope      &Scope = unsafe { nil }
	stmts      []Stmt
}

struct ForStmt {
pub:
	is_inf   bool // `for {}`
	pos      token.Pos
	comments []Comment
pub mut:
	cond  Expr
	stmts []Stmt
	label string // `label: for {`
	scope &Scope = unsafe { nil }
}

struct GenericInst {
pub mut:
	parent_idx     int    // idx of the base generic struct
	concrete_types []Type // concrete types, e.g. [int, string]
}

instantiation of a generic struct

struct GetEmbedsOptions {
	preceding []Type
}

struct GlobalDecl {
pub:
	mod      string
	pos      token.Pos
	is_block bool   // __global() block
	attrs    []Attr // tags like `[markused]`, valid for all the globals in the list
pub mut:
	fields       []GlobalField
	end_comments []Comment
}

struct GlobalField {
pub:
	name        string
	has_expr    bool
	pos         token.Pos
	typ_pos     token.Pos
	is_markused bool // an explicit `[markused]` tag; the global will NOT be removed by `-skip-unused`
	is_volatile bool
pub mut:
	expr     Expr
	typ      Type
	comments []Comment
}

struct GoExpr {
pub:
	pos token.Pos
pub mut:
	call_expr CallExpr
	is_expr   bool
}

struct GotoLabel {
pub:
	name string
	pos  token.Pos
pub mut:
	is_used bool
}

struct GotoStmt {
pub:
	name string
	pos  token.Pos
}

struct HashStmt {
pub:
	mod         string
	pos         token.Pos
	source_file string
pub mut:
	val      string // example: 'include  # please install openssl // comment'
	kind     string // : 'include'
	main     string // : ''
	msg      string // : 'please install openssl'
	ct_conds []Expr // *all* comptime conditions, that must be true, for the hash to be processed
	// ct_conds is filled by the checker, based on the current nesting of `$if cond1 {}` blocks
}

#include, #define etc

struct Ident {
pub:
	language Language
	tok_kind token.Kind
	pos      token.Pos
	mut_pos  token.Pos
	comptime bool
pub mut:
	scope          &Scope = unsafe { nil }
	obj            ScopeObject
	mod            string
	name           string
	kind           IdentKind
	info           IdentInfo
	is_mut         bool // if mut *token* is before name. Use `is_mut()` to lookup mut variable
	or_expr        OrExpr
	concrete_types []Type
}

A single identifier

fn (i &Ident) is_auto_heap() bool

fn (i &Ident) is_mut() bool

fn (i &Ident) var_info() IdentVar

struct IdentFn {
pub mut:
	typ Type
}

struct IdentVar {
pub mut:
	typ         Type
	is_mut      bool
	is_static   bool
	is_volatile bool
	is_option   bool
	share       ShareType
}

Todo: (joe) remove completely, use ident.objinstead which points to the scope object

struct IfBranch {
pub:
	pos      token.Pos
	body_pos token.Pos
	comments []Comment
pub mut:
	cond      Expr
	pkg_exist bool
	stmts     []Stmt
	scope     &Scope = unsafe { nil }
}

struct IfExpr {
pub:
	is_comptime   bool
	tok_kind      token.Kind
	pos           token.Pos
	post_comments []Comment
pub mut:
	left     Expr       // `a` in `a := if ...`
	branches []IfBranch // includes all `else if` branches
	is_expr  bool
	typ      Type
	has_else bool
	// implements bool // comptime $if implements interface
}

struct IfGuardExpr {
pub:
	vars []IfGuardVar
pub mut:
	expr      Expr // `opt()`
	expr_type Type // type of `opt()`
}

if x := opt() {

struct IfGuardVar {
pub mut:
	name   string
	is_mut bool
	pos    token.Pos
}

struct Import {
pub:
	mod       string // the module name of the import
	alias     string // the `x` in `import xxx as x`
	pos       token.Pos
	mod_pos   token.Pos
	alias_pos token.Pos
	syms_pos  token.Pos
pub mut:
	syms          []ImportSymbol // the list of symbols in `import {symbol1, symbol2}`
	comments      []Comment
	next_comments []Comment
}

import statement

struct ImportSymbol {
pub:
	pos  token.Pos
	name string
}

import symbol,for import {symbol} syntax

struct IndexExpr {
pub:
	pos token.Pos
pub mut:
	index     Expr // [0], RangeExpr [start..end] or map[key]
	or_expr   OrExpr
	left      Expr
	left_type Type // array, map, fixed array
	is_setter bool
	is_map    bool
	is_array  bool
	is_farray bool
	is_option bool // IfGuard
	is_direct bool // Set if the underlying memory can be safely accessed
	is_gated  bool // #[] gated array
}

fn (mut lx IndexExpr) recursive_mapset_is_setter(val bool)

helper for dealing with m[k1][k2][k3][k3] = value

fn (mut lx IndexExpr) recursive_arraymap_set_is_setter()

struct InfixExpr {
pub:
	op      token.Kind
	pos     token.Pos
	is_stmt bool
pub mut:
	left          Expr
	right         Expr
	left_type     Type
	right_type    Type
	promoted_type Type = ast.void_type
	auto_locked   string
	or_block      OrExpr

	ct_left_value_evaled  bool
	ct_left_value         ComptTimeConstValue = empty_comptime_const_expr()
	ct_right_value_evaled bool
	ct_right_value        ComptTimeConstValue = empty_comptime_const_expr()

	before_op_comments []Comment
	after_op_comments  []Comment
}

left op right See: token.Kind.is_infix

struct IntegerLiteral {
pub:
	val string
	pos token.Pos
}

struct Interface {
pub mut:
	types   []Type // all types that implement this interface
	fields  []StructField
	methods []Fn
	embeds  []Type
	// `I1 is I2` conversions
	conversions map[int][]Type
	// generic interface support
	is_generic     bool
	generic_types  []Type
	concrete_types []Type
	parent_type    Type
}

fn (i &Interface) find_field(name string) ?StructField

fn (i &Interface) find_method(name string) ?Fn

fn (i &Interface) has_method(name string) bool

fn (i Interface) defines_method(name string) bool

fn (i Interface) get_methods() []string

struct InterfaceDecl {
pub:
	name          string
	typ           Type
	name_pos      token.Pos
	language      Language
	field_names   []string
	is_pub        bool
	mut_pos       int // mut:
	pos           token.Pos
	pre_comments  []Comment
	generic_types []Type
	attrs         []Attr
pub mut:
	methods             []FnDecl
	fields              []StructField
	embeds              []InterfaceEmbedding
	are_embeds_expanded bool
}

struct InterfaceEmbedding {
pub:
	name     string
	typ      Type
	pos      token.Pos
	comments []Comment
}

struct IsRefType {
pub:
	guessed_type bool // a legacy `isreftype( GuessedType )` => a deprecation notice, suggesting `v fmt -w .` => `isreftype[ Type ]()`
	is_type      bool
	pos          token.Pos
pub mut:
	expr Expr // checker uses this to set typ, when !is_type
	typ  Type
}

struct LambdaExpr {
pub:
	pos token.Pos
pub mut:
	params     []Ident
	pos_expr   token.Pos
	expr       Expr
	pos_end    token.Pos
	scope      &Scope  = unsafe { nil }
	func       &AnonFn = unsafe { nil }
	is_checked bool
	typ        Type
}

struct Likely {
pub:
	pos       token.Pos
	is_likely bool // false for _unlikely_
pub mut:
	expr Expr
}

struct LockExpr {
pub:
	is_rlock []bool
	pos      token.Pos
pub mut:
	stmts    []Stmt
	lockeds  []Expr // `x`, `y.z` in `lock x, y.z {`
	comments []Comment
	is_expr  bool
	typ      Type
	scope    &Scope = unsafe { nil }
}

struct Map {
pub mut:
	key_type   Type
	value_type Type
}

struct MapInit {
pub:
	pos       token.Pos
	comments  [][]Comment // comments after key-value pairs
	pre_cmnts []Comment   // comments before the first key-value pair
pub mut:
	keys       []Expr
	vals       []Expr
	val_types  []Type
	typ        Type
	key_type   Type
	value_type Type
}

struct MatchBranch {
pub:
	ecmnts        [][]Comment // inline comments for each left side expr
	pos           token.Pos
	is_else       bool
	post_comments []Comment // comments below ´... }´
	branch_pos    token.Pos // for checker errors about invalid branches
pub mut:
	stmts []Stmt // right side
	exprs []Expr // left side
	scope &Scope = unsafe { nil }
}

struct MatchExpr {
pub:
	tok_kind token.Kind
	pos      token.Pos
	comments []Comment // comments before the first branch
pub mut:
	cond          Expr
	branches      []MatchBranch
	is_expr       bool // returns a value
	return_type   Type
	cond_type     Type // type of `x` in `match x {`
	expected_type Type // for debugging only
	is_sum_type   bool
}

struct Module {
pub:
	name       string // encoding.base64
	short_name string // base64
	attrs      []Attr
	pos        token.Pos
	name_pos   token.Pos // `name` in import name
	is_skipped bool      // module main can be skipped in single file programs
}

module declaration

struct MultiReturn {
pub mut:
	types []Type
}

struct Nil {
pub:
	pos token.Pos
}

struct NodeError {
pub:
	idx int // index for referencing the related File error
	pos token.Pos
}

struct None {
pub:
	pos token.Pos
}

struct OffsetOf {
pub:
	struct_type Type
	field       string
	pos         token.Pos
}

struct OrExpr {
pub:
	kind OrKind
	pos  token.Pos
pub mut:
	stmts []Stmt
}

or { ... }

struct Param {
pub:
	pos         token.Pos
	name        string
	is_mut      bool
	is_shared   bool
	is_atomic   bool
	is_auto_rec bool
	type_pos    token.Pos
	is_hidden   bool // interface first arg
pub mut:
	typ      Type
	comments []Comment
}

fn (p &Param) specifier() string

struct ParExpr {
pub:
	pos token.Pos
pub mut:
	expr     Expr
	comments []Comment
}

(3+4)

struct PostfixExpr {
pub:
	op            token.Kind
	pos           token.Pos
	is_c2v_prefix bool // for `--x` (`x--$`), only for translated code until c2v can handle it
pub mut:
	expr        Expr
	typ         Type
	auto_locked string
}

++, --

struct PrefixExpr {
pub:
	op  token.Kind
	pos token.Pos
pub mut:
	right_type Type
	right      Expr
	or_block   OrExpr
	is_option  bool // IfGuard
}

See: token.Kind.is_prefix

struct RangeExpr {
pub:
	has_high bool
	has_low  bool
	pos      token.Pos
	is_gated bool // #[] gated array
pub mut:
	low  Expr
	high Expr
	typ  Type // filled in by checker; the type of `0...1` is `int` for example, while `a`...`z` is `rune` etc
}

s[10..20]

struct Return {
pub:
	pos      token.Pos
	comments []Comment
pub mut:
	exprs []Expr
	types []Type
}

function return statement

struct Scope {
pub mut:
	// mut:
	objects              map[string]ScopeObject
	struct_fields        map[string]ScopeStructField
	parent               &Scope = unsafe { nil }
	detached_from_parent bool
	children             []&Scope
	start_pos            int
	end_pos              int
}

fn (s &Scope) free()

fn (s &Scope) find(name string) ?ScopeObject

fn (s &Scope) find_struct_field(name string, struct_type Type, field_name string) ?ScopeStructField

selector_expr: name.field_name

fn (s &Scope) find_var(name string) ?&Var

fn (s &Scope) find_global(name string) ?&GlobalField

fn (s &Scope) find_const(name string) ?&ConstField

fn (s &Scope) known_var(name string) bool

fn (s &Scope) known_global(name string) bool

fn (s &Scope) known_const(name string) bool

fn (mut s Scope) update_var_type(name string, typ Type)

fn (mut s Scope) update_ct_var_kind(name string, kind ComptimeVarKind)

fn (mut s Scope) register_struct_field(name string, field ScopeStructField)

selector_expr: name.field_name

fn (mut s Scope) register(obj ScopeObject)

fn (s &Scope) innermost(pos int) &Scope

returns the innermost scope containing pos pub fn (s &Scope) innermost(pos int) ?&Scope {

fn (s &Scope) contains(pos int) bool

fn (s &Scope) has_inherited_vars() bool

fn (sc Scope) show(depth int, max_depth int) string

fn (sc Scope) str() string

struct ScopeStructField {
pub:
	struct_type Type // type of struct
	name        string
	pos         token.Pos
	typ         Type
	smartcasts  []Type // nested sum types require nested smart casting, for that a list of types is needed
	orig_type   Type   // original sumtype type; 0 if it's not a sumtype
	// TODO: move this to a real docs site later
	// 10 <- original type (orig_type)
	//   [11, 12, 13] <- cast order (smartcasts)
	//        12 <- the current casted type (typ)
}

used for smartcasting only struct fields change type in scopes

struct SelectBranch {
pub:
	pos           token.Pos
	comment       Comment // comment above `select {`
	is_else       bool
	is_timeout    bool
	post_comments []Comment
pub mut:
	stmt  Stmt   // `a := <-ch` or `ch <- a`
	stmts []Stmt // right side
}

struct SelectExpr {
pub:
	branches      []SelectBranch
	pos           token.Pos
	has_exception bool
pub mut:
	is_expr       bool // returns a value
	expected_type Type // for debugging only
}

struct SelectorExpr {
pub:
	pos        token.Pos
	field_name string
	is_mut     bool // is used for the case `if mut ident.selector is MyType {`, it indicates if the root ident is mutable
	mut_pos    token.Pos
	next_token token.Kind
pub mut:
	expr                Expr // expr.field_name
	expr_type           Type // type of `Foo` in `Foo.bar`
	typ                 Type // type of the entire thing (`Foo.bar`)
	name_type           Type // T in `T.name` or typeof in `typeof(expr).name`
	or_block            OrExpr
	gkind_field         GenericKindField // `T.name` => ast.GenericKindField.name, `T.typ` => ast.GenericKindField.typ, or .unknown
	scope               &Scope = unsafe { nil }
	from_embed_types    []Type // holds the type of the embed that the method is called from
	has_hidden_receiver bool
}

foo.bar

fn (e &SelectorExpr) root_ident() ?Ident

root_ident returns the origin ident where the selector started.

struct SemicolonStmt {
pub:
	pos token.Pos
}

struct SizeOf {
pub:
	guessed_type bool // a legacy `sizeof( GuessedType )` => a deprecation notice, suggesting `v fmt -w .` => `sizeof[ Type ]()`
	is_type      bool
	pos          token.Pos
pub mut:
	expr Expr // checker uses this to set typ, when !is_type
	typ  Type
}

struct SpawnExpr {
pub:
	pos token.Pos
pub mut:
	call_expr CallExpr
	is_expr   bool
}

struct SqlExpr {
pub:
	is_count   bool
	has_where  bool
	has_order  bool
	has_limit  bool
	has_offset bool
	has_desc   bool
	is_array   bool
	// is_generated indicates a statement is generated by ORM for complex queries with related tables.
	is_generated bool
	pos          token.Pos
pub mut:
	typ         Type
	db_expr     Expr // `db` in `sql db {`
	where_expr  Expr
	order_expr  Expr
	limit_expr  Expr
	offset_expr Expr
	table_expr  TypeNode
	fields      []StructField
	sub_structs map[int]SqlExpr
	or_expr     OrExpr
}

struct SqlStmt {
pub:
	pos token.Pos
pub mut:
	lines        []SqlStmtLine
	db_expr      Expr // `db` in `sql db {`
	or_expr      OrExpr
	db_expr_type Type // the type of the `db` in `sql db {`
}

struct SqlStmtLine {
pub:
	kind SqlStmtKind
	pos  token.Pos
	// is_generated indicates a statement is generated by ORM for complex queries with related tables.
	is_generated bool
	scope        &Scope = unsafe { nil }
pub mut:
	object_var      string   // `user`
	updated_columns []string // for `update set x=y`
	table_expr      TypeNode
	fields          []StructField
	sub_structs     map[int]SqlStmtLine
	where_expr      Expr
	update_exprs    []Expr // for `update`
}

struct StringInterLiteral {
pub:
	vals       []string
	fwidths    []int
	precisions []int
	pluss      []bool
	fills      []bool
	fmt_poss   []token.Pos
	pos        token.Pos
pub mut:
	exprs      []Expr
	expr_types []Type
	fmts       []u8
	need_fmts  []bool // an explicit non-default fmt required, e.g. `x`
}

'name: $name'

fn (lit &StringInterLiteral) get_fspec_braces(i int) (string, bool)

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.

struct StringLiteral {
pub:
	val      string
	is_raw   bool
	language Language
	pos      token.Pos
}

struct Struct {
pub:
	attrs []Attr
pub mut:
	embeds         []Type
	fields         []StructField
	is_typedef     bool // C. [typedef]
	is_union       bool
	is_heap        bool
	is_minify      bool
	is_anon        bool
	is_generic     bool
	generic_types  []Type
	concrete_types []Type
	parent_type    Type
}

fn (s Struct) find_field(name string) ?StructField

fn (s Struct) get_field(name string) StructField

struct StructDecl {
pub:
	pos           token.Pos
	name          string
	generic_types []Type
	is_pub        bool
	// _pos fields for vfmt
	mut_pos      int = -1 // mut:
	pub_pos      int = -1 // pub:
	pub_mut_pos  int = -1 // pub mut:
	global_pos   int = -1 // __global:
	module_pos   int = -1 // module:
	language     Language
	is_union     bool
	attrs        []Attr
	pre_comments []Comment
	end_comments []Comment
	embeds       []Embed
pub mut:
	fields []StructField
}

struct StructField {
pub:
	pos              token.Pos
	type_pos         token.Pos
	option_pos       token.Pos
	comments         []Comment
	i                int
	has_default_expr bool
	attrs            []Attr
	is_pub           bool
	default_val      string
	is_mut           bool
	is_global        bool
	is_volatile      bool
	is_deprecated    bool
pub mut:
	is_recursive     bool
	default_expr     Expr
	default_expr_typ Type
	name             string
	typ              Type
	unaliased_typ    Type
	anon_struct_decl StructDecl // only if the field is an anonymous struct
}

fn (f &StructField) equals(o &StructField) bool

struct StructInit {
pub:
	pos             token.Pos
	name_pos        token.Pos
	no_keys         bool // `Foo{val1, val2}`
	is_short_syntax bool // `foo(field1: val1, field2: val2)`
	is_anon         bool //  `x: struct{ foo: bar }`
pub mut:
	unresolved           bool
	pre_comments         []Comment
	typ_str              string // 'Foo'
	typ                  Type   // the type of this struct
	update_expr          Expr   // `a` in `...a`
	update_expr_type     Type
	update_expr_pos      token.Pos
	update_expr_comments []Comment
	is_update_embed      bool
	has_update_expr      bool // has `...a`
	init_fields          []StructInitField
	generic_types        []Type
}

s := Foo{ ...a field1: 'hello' }

struct StructInitField {
pub:
	pos           token.Pos
	name_pos      token.Pos
	comments      []Comment
	next_comments []Comment
pub mut:
	expr          Expr   // `val1`
	name          string // 'field1'
	typ           Type   // the type of this field
	expected_type Type
	parent_type   Type
}

field1: val1

struct SumType {
pub mut:
	fields       []StructField
	found_fields bool
	is_anon      bool
	// generic sumtype support
	is_generic     bool
	variants       []Type
	generic_types  []Type
	concrete_types []Type
	parent_type    Type
}

fn (s &SumType) find_field(name string) ?StructField

struct SumTypeDecl {
pub:
	name          string
	is_pub        bool
	pos           token.Pos
	name_pos      token.Pos
	typ           Type
	generic_types []Type
	attrs         []Attr // attributes of type declaration
pub mut:
	variants []TypeNode
}