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v/vlib/builtin/builtin.v

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// Copyright (c) 2019-2022 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
[has_globals]
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module builtin
// isnil returns true if an object is nil (only for C objects).
[inline]
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pub fn isnil(v voidptr) bool {
return v == 0
}
/*
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fn on_panic(f fn(int)int) {
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// TODO
}
*/
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struct VCastTypeIndexName {
tindex int
tname string
}
// will be filled in cgen
__global as_cast_type_indexes []VCastTypeIndexName
fn __as_cast(obj voidptr, obj_type int, expected_type int) voidptr {
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if obj_type != expected_type {
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mut obj_name := as_cast_type_indexes[0].tname.clone()
mut expected_name := as_cast_type_indexes[0].tname.clone()
for x in as_cast_type_indexes {
if x.tindex == obj_type {
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obj_name = x.tname.clone()
}
if x.tindex == expected_type {
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expected_name = x.tname.clone()
}
}
panic('as cast: cannot cast `${obj_name}` to `${expected_name}`')
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}
return obj
}
// VAssertMetaInfo is used during assertions. An instance of it is filled in by
// compile time generated code, when an assertion fails.
pub struct VAssertMetaInfo {
pub:
fpath string // the source file path of the assertion
line_nr int // the line number of the assertion
fn_name string // the function name in which the assertion is
src string // the actual source line of the assertion
op string // the operation of the assertion, i.e. '==', '<', 'call', etc ...
llabel string // the left side of the infix expressions as source
rlabel string // the right side of the infix expressions as source
lvalue string // the stringified *actual value* of the left side of a failed assertion
rvalue string // the stringified *actual value* of the right side of a failed assertion
message string // the value of the `message` from `assert cond, message`
has_msg bool // false for assertions like `assert cond`, true for `assert cond, 'oh no'`
}
// free frees the memory occupied by the assertion meta data. It is called automatically by
// the code, that V's test framework generates, after all other callbacks have been called.
[manualfree; unsafe]
pub fn (ami &VAssertMetaInfo) free() {
unsafe {
ami.fpath.free()
ami.fn_name.free()
ami.src.free()
ami.op.free()
ami.llabel.free()
ami.rlabel.free()
ami.lvalue.free()
ami.rvalue.free()
ami.message.free()
}
}
fn __print_assert_failure(i &VAssertMetaInfo) {
eprintln('${i.fpath}:${i.line_nr + 1}: FAIL: fn ${i.fn_name}: assert ${i.src}')
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if i.op.len > 0 && i.op != 'call' {
eprintln(' left value: ${i.llabel} = ${i.lvalue}')
if i.rlabel == i.rvalue {
eprintln(' right value: ${i.rlabel}')
} else {
eprintln(' right value: ${i.rlabel} = ${i.rvalue}')
}
if i.has_msg {
eprintln(' message: ${i.message}')
}
}
}
// MethodArgs holds type information for function and/or method arguments.
pub struct MethodArgs {
pub:
typ int
name string
}
// FunctionData holds information about a parsed function.
pub struct FunctionData {
pub:
name string
attrs []string
args []MethodArgs
return_type int
typ int
}
// FieldData holds information about a field. Fields reside on structs.
pub struct FieldData {
pub:
name string // the name of the field f
typ int // the internal TypeID of the field f,
unaliased_typ int // if f's type was an alias of int, this will be TypeID(int)
//
attrs []string // the attributes of the field f
is_pub bool // f is in a `pub:` section
is_mut bool // f is in a `mut:` section
//
is_shared bool // `f shared Abc`
is_atomic bool // `f atomic int` , TODO
is_optional bool // `f ?string` , TODO
//
is_array bool // `f []string` , TODO
is_map bool // `f map[string]int` , TODO
is_chan bool // `f chan int` , TODO
is_struct bool // `f Abc` where Abc is a struct , TODO
//
indirections u8 // 0 for `f int`, 1 for `f &int`, 2 for `f &&int` , TODO
}
pub enum AttributeKind {
plain // [name]
string // ['name']
number // [123]
comptime_define // [if name]
}
pub struct StructAttribute {
pub:
name string
has_arg bool
arg string
kind AttributeKind
}