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