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cgen: use the new match syntax

pull/5417/head
Alexander Medvednikov 2020-06-18 20:21:08 +02:00
parent d4b17fb0c3
commit 78b32892ac
4 changed files with 254 additions and 267 deletions
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466
vlib/v/gen/cgen.v
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File diff suppressed because it is too large Load Diff

14
vlib/v/parser/fn.v
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@ -11,11 +11,11 @@ import v.util
pub fn (mut p Parser) call_expr(language table.Language, mod string) ast.CallExpr { pub fn (mut p Parser) call_expr(language table.Language, mod string) ast.CallExpr {
first_pos := p.tok.position() first_pos := p.tok.position()
fn_name := if language == .c { fn_name := if language == .c {
'C.${p.check_name()}' 'C.$p.check_name()'
} else if language == .js { } else if language == .js {
'JS.${p.check_js_name()}' 'JS.$p.check_js_name()'
} else if mod.len > 0 { } else if mod.len > 0 {
'${mod}.${p.check_name()}' '${mod}.$p.check_name()'
} else { } else {
p.check_name() p.check_name()
} }
@ -181,11 +181,7 @@ fn (mut p Parser) fn_decl() ast.FnDecl {
mut name := '' mut name := ''
if p.tok.kind == .name { if p.tok.kind == .name {
// TODO high order fn // TODO high order fn
name = if language == .js { name = if language == .js { p.check_js_name() } else { p.check_name() }
p.check_js_name()
} else {
p.check_name()
}
if language == .v && !p.pref.translated && util.contains_capital(name) { if language == .v && !p.pref.translated && util.contains_capital(name) {
p.error('function names cannot contain uppercase letters, use snake_case instead') p.error('function names cannot contain uppercase letters, use snake_case instead')
} }
@ -491,7 +487,7 @@ fn have_fn_main(stmts []ast.Stmt) bool {
for stmt in stmts { for stmt in stmts {
match stmt { match stmt {
ast.FnDecl { ast.FnDecl {
if it.name == 'main' { if stmt.name == 'main' {
has_main_fn = true has_main_fn = true
} }
} }

38
vlib/v/parser/parser.v
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@ -280,11 +280,11 @@ pub fn (mut p Parser) close_scope() {
for _, obj in p.scope.objects { for _, obj in p.scope.objects {
match obj { match obj {
ast.Var { ast.Var {
if !it.is_used && it.name[0] != `_` { if !obj.is_used && obj.name[0] != `_` {
if p.pref.is_prod { if p.pref.is_prod {
p.error_with_pos('unused variable: `$it.name`', it.pos) p.error_with_pos('unused variable: `$obj.name`', obj.pos)
} else { } else {
p.warn_with_pos('unused variable: `$it.name`', it.pos) p.warn_with_pos('unused variable: `$obj.name`', obj.pos)
} }
} }
/* /*
@ -356,7 +356,7 @@ fn (mut p Parser) check(expected token.Kind) {
// p.next() // p.next()
// } // }
if p.tok.kind != expected { if p.tok.kind != expected {
p.error('unexpected `${p.tok.kind.str()}`, expecting `${expected.str()}`') p.error('unexpected `$p.tok.kind.str()`, expecting `$expected.str()`')
} }
p.next() p.next()
} }
@ -525,12 +525,10 @@ pub fn (mut p Parser) stmt(is_top_level bool) ast.Stmt {
return ast.GotoLabel{ return ast.GotoLabel{
name: name name: name
} }
} } else if p.peek_tok.kind == .name {
else if p.peek_tok.kind == .name {
p.error_with_pos('unexpected name `$p.peek_tok.lit`', p.peek_tok.position()) p.error_with_pos('unexpected name `$p.peek_tok.lit`', p.peek_tok.position())
} } else if !p.inside_if_expr && !p.inside_match_body && !p.inside_or_expr &&
else if !p.inside_if_expr && !p.inside_match_body && !p.inside_or_expr && p.peek_tok.kind in p.peek_tok.kind in [.rcbr, .eof] {
[.rcbr, .eof] {
p.error_with_pos('`$p.tok.lit` evaluated but not used', p.tok.position()) p.error_with_pos('`$p.tok.lit` evaluated but not used', p.tok.position())
} }
} }
@ -608,7 +606,6 @@ pub fn (mut p Parser) stmt(is_top_level bool) ast.Stmt {
} }
} }
fn (mut p Parser) expr_list() []ast.Expr { fn (mut p Parser) expr_list() []ast.Expr {
mut exprs := []ast.Expr{} mut exprs := []ast.Expr{}
for { for {
@ -641,7 +638,7 @@ fn (mut p Parser) attributes(is_top_stmt bool) []ast.Attr {
p.next() p.next()
break break
} }
p.error('unexpected `${p.tok.kind.str()}`, expecting `${expected.str()}`') p.error('unexpected `$p.tok.kind.str()`, expecting `$expected.str()`')
} }
p.next() p.next()
} }
@ -752,11 +749,9 @@ fn (mut p Parser) parse_multi_expr(is_top_level bool) ast.Stmt {
left0 := left[0] left0 := left[0]
if p.tok.kind in [.assign, .decl_assign] || p.tok.kind.is_assign() { if p.tok.kind in [.assign, .decl_assign] || p.tok.kind.is_assign() {
return p.partial_assign_stmt(left) return p.partial_assign_stmt(left)
} } else if is_top_level && tok.kind !in [.key_if, .key_match] && left0 !is ast.CallExpr &&
else if is_top_level && tok.kind !in [.key_if, .key_match] && left0 !is ast.PostfixExpr && !(left0 is ast.InfixExpr && (left0 as ast.InfixExpr).op == .left_shift) &&
left0 !is ast.CallExpr && left0 !is ast.PostfixExpr && left0 !is ast.ComptimeCall {
!(left0 is ast.InfixExpr && (left0 as ast.InfixExpr).op == .left_shift) &&
left0 !is ast.ComptimeCall {
p.error_with_pos('expression evaluated but not used', left0.position()) p.error_with_pos('expression evaluated but not used', left0.position())
} }
if left.len == 1 { if left.len == 1 {
@ -860,7 +855,7 @@ pub fn (mut p Parser) name_expr() ast.Expr {
match mut obj { match mut obj {
ast.Var { ast.Var {
known_var = true known_var = true
it.is_used = true obj.is_used = true
} }
else {} else {}
} }
@ -1141,11 +1136,7 @@ fn (mut p Parser) string_expr() ast.Expr {
node = ast.StringLiteral{ node = ast.StringLiteral{
val: val val: val
is_raw: is_raw is_raw: is_raw
language: if is_cstr { language: if is_cstr { table.Language.c } else { table.Language.v }
table.Language.c
} else {
table.Language.v
}
pos: pos pos: pos
} }
return node return node
@ -1222,7 +1213,7 @@ fn (mut p Parser) string_expr() ast.Expr {
node = ast.StringInterLiteral{ node = ast.StringInterLiteral{
vals: vals vals: vals
exprs: exprs exprs: exprs
need_fmts: has_fmts // prelimery - until checker finds out if really needed need_fmts: has_fmts
fwidths: fwidths fwidths: fwidths
precisions: precisions precisions: precisions
pluss: visible_pluss pluss: visible_pluss
@ -1231,6 +1222,7 @@ fn (mut p Parser) string_expr() ast.Expr {
fmt_poss: fposs fmt_poss: fposs
pos: pos pos: pos
} }
// need_fmts: prelimery - until checker finds out if really needed
p.inside_str_interp = false p.inside_str_interp = false
return node return node
} }

3
vlib/v/parser/pratt.v
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@ -191,8 +191,7 @@ pub fn (mut p Parser) expr(precedence int) ast.Expr {
op: tok.kind op: tok.kind
pos: pos pos: pos
} }
} } else if p.tok.kind.is_infix() {
else if p.tok.kind.is_infix() {
// return early for deref assign `*x = 2` goes to prefix expr // return early for deref assign `*x = 2` goes to prefix expr
if p.tok.kind == .mul && p.tok.line_nr != p.prev_tok.line_nr && p.peek_tok2.kind == if p.tok.kind == .mul && p.tok.line_nr != p.prev_tok.line_nr && p.peek_tok2.kind ==
.assign { .assign {