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new match statement
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parent
3f506714ec
commit
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@ -946,7 +946,7 @@ fn (p mut Parser) statements_no_curly_end() string {
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mut i := 0
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mut last_st_typ := ''
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for p.tok != .rcbr && p.tok != .eof && p.tok != .key_case &&
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p.tok != .key_default {
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p.tok != .key_default && p.peek() != .arrow {
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// println(p.tok.str())
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// p.print_tok()
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last_st_typ = p.statement(true)
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@ -961,7 +961,7 @@ fn (p mut Parser) statements_no_curly_end() string {
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p.error('more than 50 000 statements in function `$p.cur_fn.name`')
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}
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}
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if p.tok != .key_case && p.tok != .key_default {
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if p.tok != .key_case && p.tok != .key_default && p.peek() != .arrow {
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// p.next()
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p.check(.rcbr)
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}
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@ -1044,7 +1044,7 @@ fn (p mut Parser) statement(add_semi bool) string {
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p.if_st(false, 0)
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case Token.key_for:
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p.for_st()
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case Token.key_switch:
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case Token.key_switch, Token.key_match:
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p.switch_statement()
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case Token.key_mut, Token.key_static:
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p.var_decl()
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@ -3031,14 +3031,18 @@ fn (p mut Parser) for_st() {
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}
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fn (p mut Parser) switch_statement() {
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if p.tok == .key_switch {
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p.check(.key_switch)
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} else {
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p.check(.key_match)
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}
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p.cgen.start_tmp()
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typ := p.bool_expression()
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expr := p.cgen.end_tmp()
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p.check(.lcbr)
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mut i := 0
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for p.tok == .key_case || p.tok == .key_default {
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if p.tok == .key_default {
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for p.tok == .key_case || p.tok == .key_default || p.peek() == .arrow || p.tok == .key_else {
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if p.tok == .key_default || p.tok == .key_else {
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p.genln('else { // default:')
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p.check(.key_default)
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p.check(.colon)
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@ -3071,7 +3075,12 @@ fn (p mut Parser) switch_statement() {
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p.check(.comma)
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got_comma = true
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}
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if p.tok == .colon {
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p.check(.colon)
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}
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else {
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p.check(.arrow)
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}
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p.gen(')) {')
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p.genln('/* case */')
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p.statements()
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@ -430,6 +430,10 @@ fn (s mut Scanner) scan() ScanRes {
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s.pos++
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return scan_res(.eq, '')
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}
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else if nextc == `>` {
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s.pos++
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return scan_res(.arrow, '')
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}
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else {
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return scan_res(.assign, '')
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}
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11
compiler/tests/match_test.v
Normal file
11
compiler/tests/match_test.v
Normal file
@ -0,0 +1,11 @@
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fn test_switch() {
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a := 3
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mut b := 0
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match a {
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2 => println('two')
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3 => println('three')
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b = 3
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4 => println('4')
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}
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assert b == 3
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}
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@ -27,6 +27,7 @@ enum Token {
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comma
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semicolon
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colon
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arrow // =>
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amp
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hash
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dollar
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@ -90,7 +91,7 @@ enum Token {
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key_import_const
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key_in
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key_interface
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MATCH
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key_match
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key_module
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key_mut
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key_return
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@ -148,6 +149,7 @@ fn build_token_str() []string {
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s[Token.comma] = ','
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s[Token.semicolon] = ';'
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s[Token.colon] = ':'
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s[Token.arrow] = '=>'
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s[Token.assign] = '='
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s[Token.decl_assign] = ':='
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s[Token.plus_assign] = '+='
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@ -215,6 +217,7 @@ fn build_token_str() []string {
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s[Token.key_static] = 'static'
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s[Token.key_as] = 'as'
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s[Token.key_defer] = 'defer'
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s[Token.key_match] = 'match'
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return s
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}
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