mirror of
https://github.com/vlang/v.git
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139 lines
3.5 KiB
V
139 lines
3.5 KiB
V
// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module builtin
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__global (
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g_m2_buf &byte
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g_m2_ptr &byte
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)
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// isnil returns true if an object is nil (only for C objects).
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pub fn isnil(v voidptr) bool {
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return v == 0
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}
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[deprecated: 'use os.is_atty(x) instead']
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pub fn is_atty(fd int) int {
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panic('use os.is_atty(x) instead')
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return 0
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}
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/*
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fn on_panic(f fn(int)int) {
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// TODO
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}
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*/
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// print_backtrace shows a backtrace of the current call stack on stdout
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pub fn print_backtrace() {
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// at the time of backtrace_symbols_fd call, the C stack would look something like this:
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// 1 frame for print_backtrace_skipping_top_frames
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// 1 frame for print_backtrace itself
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// ... print the rest of the backtrace frames ...
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// => top 2 frames should be skipped, since they will not be informative to the developer
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$if freestanding {
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println(bare_backtrace())
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} $else {
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print_backtrace_skipping_top_frames(2)
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}
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}
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struct VCastTypeIndexName {
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tindex int
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tname string
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}
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__global (
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total_m = i64(0)
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nr_mallocs = int(0)
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// will be filled in cgen
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as_cast_type_indexes []VCastTypeIndexName
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)
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fn __as_cast(obj voidptr, obj_type int, expected_type int) voidptr {
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if obj_type != expected_type {
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mut obj_name := as_cast_type_indexes[0].tname.clone()
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mut expected_name := as_cast_type_indexes[0].tname.clone()
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for x in as_cast_type_indexes {
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if x.tindex == obj_type {
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obj_name = x.tname.clone()
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}
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if x.tindex == expected_type {
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expected_name = x.tname.clone()
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}
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}
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panic('as cast: cannot cast `$obj_name` to `$expected_name`')
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}
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return obj
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}
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// VAssertMetaInfo is used during assertions. An instance of it
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// is filled in by compile time generated code, when an assertion fails.
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pub struct VAssertMetaInfo {
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pub:
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fpath string // the source file path of the assertion
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line_nr int // the line number of the assertion
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fn_name string // the function name in which the assertion is
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src string // the actual source line of the assertion
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op string // the operation of the assertion, i.e. '==', '<', 'call', etc ...
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llabel string // the left side of the infix expressions as source
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rlabel string // the right side of the infix expressions as source
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lvalue string // the stringified *actual value* of the left side of a failed assertion
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rvalue string // the stringified *actual value* of the right side of a failed assertion
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}
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fn __print_assert_failure(i &VAssertMetaInfo) {
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eprintln('$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' {
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eprintln(' left value: $i.llabel = $i.lvalue')
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if i.rlabel == i.rvalue {
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eprintln(' right value: $i.rlabel')
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} else {
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eprintln(' right value: $i.rlabel = $i.rvalue')
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}
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}
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}
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// MethodArgs holds type information for function and/or method arguments.
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pub struct MethodArgs {
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pub:
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typ int
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name string
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}
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// FunctionData holds information about a parsed function.
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pub struct FunctionData {
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pub:
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name string
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attrs []string
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args []MethodArgs
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return_type int
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typ int
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}
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// FieldData holds information about a field. Fields reside on structs.
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pub struct FieldData {
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pub:
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name string
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attrs []string
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is_pub bool
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is_mut bool
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typ int
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}
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pub enum AttributeKind {
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plain // [name]
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string // ['name']
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number // [123]
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comptime_define // [if name]
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}
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pub struct StructAttribute {
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pub:
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name string
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has_arg bool
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arg string
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kind AttributeKind
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}
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