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compiler: support optional custom comptime defines: $if custom ? {

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This commit is contained in:
Delyan Angelov 2020-01-16 16:28:23 +02:00 committed by Alexander Medvednikov
parent d6448ee5d6
commit 57f72f6cd8
1 changed files with 48 additions and 21 deletions
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67
vlib/compiler/comptime.v
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@ -23,6 +23,7 @@ fn (p mut Parser) comp_time() {
p.fspace()
if name in supported_platforms {
os := os_from_string(name)
ifdef_name := os_name_to_ifdef(name)
if name == 'mac' {
p.warn('use `macos` instead of `mac`')
@ -42,8 +43,8 @@ fn (p mut Parser) comp_time() {
p.genln('#ifdef $ifdef_name')
}
}
p.check(.lcbr)
os := os_from_string(name)
if ((!not && os != p.os) || (not && os == p.os)) && !name.contains('_or_') &&
!p.scanner.is_fmt && !p.pref.output_cross_c {
// `$if os {` for a different target, skip everything inside
@ -79,45 +80,67 @@ fn (p mut Parser) comp_time() {
}
}
else if name == 'x64' {
p.comptime_if_block('TARGET_IS_64BIT')
p.comptime_if_block('TARGET_IS_64BIT', not)
}
else if name == 'x32' {
p.comptime_if_block('TARGET_IS_32BIT')
p.comptime_if_block('TARGET_IS_32BIT', not)
}
else if name == 'big_endian' {
p.comptime_if_block('TARGET_ORDER_IS_BIG')
p.comptime_if_block('TARGET_ORDER_IS_BIG', not)
}
else if name == 'little_endian' {
p.comptime_if_block('TARGET_ORDER_IS_LITTLE')
p.comptime_if_block('TARGET_ORDER_IS_LITTLE', not)
}
else if name == 'debug' {
p.comptime_if_block('VDEBUG')
p.comptime_if_block('VDEBUG', not)
}
else if name == 'prealloc' {
p.comptime_if_block('VPREALLOC')
p.comptime_if_block('VPREALLOC', not)
}
else if name == 'tinyc' {
p.comptime_if_block('__TINYC__')
p.comptime_if_block('__TINYC__', not)
}
else if name == 'glibc' {
p.comptime_if_block('__GLIBC__')
p.comptime_if_block('__GLIBC__', not)
}
else if name == 'mingw' {
p.comptime_if_block('__MINGW32__')
p.comptime_if_block('__MINGW32__', not)
}
else if name == 'msvc' {
p.comptime_if_block('_MSC_VER')
p.comptime_if_block('_MSC_VER', not)
}
else if name == 'clang' {
p.comptime_if_block('__clang__')
p.comptime_if_block('__clang__', not)
}
else if p.v.compile_defines_all.len > 0 && name in p.v.compile_defines_all {
p.comptime_if_block('CUSTOM_DEFINE_${name}')
}
else {
println('Supported platforms:')
println(supported_platforms)
p.error('unknown platform `$name`')
// Support for *optional* custom compile defines, i.e.:
//
// `[if custom]` => custom should be defined
// `$if custom { // stuff }` => custom should be defined
// `$if custom ? { // stuff }` => custom may not be defined
//
// Custom compile defines are given on the CLI, like this:
// `v -d custom=0` => means that the custom will be defined,
// but that it will be considered false.
// `v -d custom=1`, which is equivalent to `v -d custom`,
// means that the custom will be defined, and considered true.
//
// The ? sign, means that `custom` is optional, and when
// it is not present at all at the command line, then the
// block will just be ignored, instead of erroring.
if p.tok == .question {
p.next()
}
p.comptime_if_block('CUSTOM_DEFINE_${name}', not)
} else {
if p.tok == .question {
p.next()
p.comptime_if_block('CUSTOM_DEFINE_${name}', not)
}else{
println('Supported platforms:')
println(supported_platforms)
p.error('unknown platform `$name`')
}
}
if_returns := p.returns
p.returns = false
@ -496,8 +519,12 @@ fn (p mut Parser) gen_array_map(str_typ string, method_ph int) string {
return 'array_' + stringify_pointer(map_type)
}
fn (p mut Parser) comptime_if_block(name string) {
p.genln('#ifdef $name')
fn (p mut Parser) comptime_if_block(name string, not bool) {
if not {
p.genln('#ifndef $name')
}else{
p.genln('#ifdef $name')
}
p.check(.lcbr)
p.statements_no_rcbr()
if !(p.tok == .dollar && p.peek() == .key_else) {