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v/vlib/compiler/vfmt.v

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// Copyright (c) 2019 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 compiler
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import strings
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import os
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[if vfmt]
fn (scanner mut Scanner) fgen(s_ string) {
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mut s := s_
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if scanner.fmt_line_empty {
s = strings.repeat(`\t`, scanner.fmt_indent) + s
}
scanner.fmt_out.write(s)
scanner.fmt_line_empty = false
}
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[if vfmt]
fn (scanner mut Scanner) fgenln(s_ string) {
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mut s := s_
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if scanner.fmt_line_empty {
s = strings.repeat(`\t`, scanner.fmt_indent) + s
}
scanner.fmt_out.writeln(s)
scanner.fmt_line_empty = true
}
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[if vfmt]
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fn (p mut Parser) fgen(s string) {
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if p.pass != .main {
return
}
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p.scanner.fgen(s)
}
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[if vfmt]
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fn (p mut Parser) fspace() {
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if p.first_pass() {
return
}
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p.fgen(' ')
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}
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[if vfmt]
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fn (p mut Parser) fgenln(s string) {
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if p.pass != .main {
return
}
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p.scanner.fgenln(s)
}
/*
fn (p mut Parser) peek() TokenKind {
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for {
p.cgen.line = p.scanner.line_nr + 1
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tok := p.scanner.peek()
if tok != .nl {
return tok
}
}
return .eof // TODO can never get here - v doesn't know that
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}
*/
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[if vfmt]
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fn (p mut Parser) fmt_inc() {
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if p.pass != .main {
return
}
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p.scanner.fmt_indent++
}
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[if vfmt]
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fn (p mut Parser) fmt_dec() {
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if p.pass != .main {
return
}
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p.scanner.fmt_indent--
}
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[if vfmt]
fn (p mut Parser) fnext() {
if p.tok == .eof {
return
}
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if p.tok == .rcbr && !p.inside_if_expr && p.prev_tok != .lcbr {
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p.fmt_dec()
}
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mut s := p.strtok()
// Need to reconstruct an interpolated string from multiple string and
// dollar tokens.
// 'abc $name zxc' => ['abc', $, name, 'zxc'] => 'abc'$name'zxc'
// need to remove the extra '
if p.tok == .str && p.peek() == .dollar {
s = s[..s.len - 1]
p.fmt_dollar = true
}
else if p.tok == .str && p.fmt_dollar {
s = s[1..]
p.fmt_dollar = false
}
p.fgen(s)
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// vfmt: increase indentation on `{` unless it's `{}`
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if p.tok == .lcbr && !p.inside_if_expr && p.peek() != .rcbr {
p.fgenln('')
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p.fmt_inc()
}
}
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[if vfmt]
fn (p mut Parser) gen_fmt() {
if p.pass != .main {
return
}
if p.file_name == '' {
return
}
s := p.scanner.fmt_out.str().trim_space()
if s == '' {
return
}
println('GENERATING ${p.file_name}.V')
out := os.create('/var/tmp/fmt/' + p.file_name) or {
verror('failed to create fmt.v')
return
}
//println(p.scanner.fmt_out.str())
out.writeln(p.scanner.fmt_out.str().trim_space())
out.close()
}