Merge branch 'master' into llvm-integration

core/c/c.odin

@@ -14,8 +14,8 @@ ushort :: b.u16;
 int    :: b.i32;
 uint   :: b.u32;
 
-long  :: (ODIN_OS == "windows" || size_of(b.rawptr) == 4) ? b.i32 : b.i64;
+long  :: b.i32 when (ODIN_OS == "windows" || size_of(b.rawptr) == 4) else b.i64;
-ulong :: (ODIN_OS == "windows" || size_of(b.rawptr) == 4) ? b.u32 : b.u64;
+ulong :: b.u32 when (ODIN_OS == "windows" || size_of(b.rawptr) == 4) else b.u64;
 
 longlong       :: b.i64;
 ulonglong      :: b.u64;
@@ -32,4 +32,4 @@ ptrdiff_t :: b.int;
 uintptr_t :: b.uintptr;
 intptr_t  :: b.int;
 
-wchar_t :: (ODIN_OS == "windows") ? b.u16 : b.u32;
+wchar_t :: b.u16 when (ODIN_OS == "windows") else b.u32;

core/fmt/fmt.odin

@@ -732,7 +732,7 @@ fmt_float :: proc(fi: ^Info, v: f64, bit_size: int, verb: rune) {
 		}
 
 		strings.write_string(fi.buf, "0h");
-		_fmt_int(fi, u, 16, false, bit_size, verb == 'h' ? __DIGITS_LOWER : __DIGITS_UPPER);
+		_fmt_int(fi, u, 16, false, bit_size, __DIGITS_LOWER if verb == 'h' else __DIGITS_UPPER);
 
 
 	case:
@@ -1154,7 +1154,7 @@ fmt_value :: proc(fi: ^Info, v: any, verb: rune) {
 			is_soa := b.soa_kind != .None;
 
 			strings.write_string(fi.buf, info.name);
-			strings.write_byte(fi.buf, is_soa ? '[' : '{');
+			strings.write_byte(fi.buf, '[' if is_soa else '{');
 
 			hash   := fi.hash;   defer fi.hash = hash;
 			indent := fi.indent; defer fi.indent -= 1;
@@ -1165,7 +1165,7 @@ fmt_value :: proc(fi: ^Info, v: any, verb: rune) {
 			if hash	do strings.write_byte(fi.buf, '\n');
 			defer {
 				if hash do for in 0..<indent do strings.write_byte(fi.buf, '\t');
-				strings.write_byte(fi.buf, is_soa ? ']' : '}');
+				strings.write_byte(fi.buf, ']' if is_soa else '}');
 			}
 
 			if is_soa {
@@ -1415,8 +1415,8 @@ fmt_value :: proc(fi: ^Info, v: any, verb: rune) {
 
 		is_soa := info.soa_kind != .None;
 
-		strings.write_byte(fi.buf, is_soa ? '[' : '{');
+		strings.write_byte(fi.buf, '[' if is_soa else '{');
-		defer strings.write_byte(fi.buf, is_soa ? ']' : '}');
+		defer strings.write_byte(fi.buf, ']' if is_soa else '}');
 
 		fi.indent += 1;  defer fi.indent -= 1;
 		hash := fi.hash; defer fi.hash = hash;

core/log/file_console_logger.odin

@@ -64,7 +64,7 @@ file_console_logger_proc :: proc(logger_data: rawptr, level: Level, text: string
     data := cast(^File_Console_Logger_Data)logger_data;
     h : os.Handle;
     if(data.file_handle != os.INVALID_HANDLE) do h = data.file_handle;
-    else                                      do h = level <= Level.Error ? context.stdout : context.stderr;
+    else                                      do h = context.stdout if level <= Level.Error else context.stderr;
     backing: [1024]byte; //NOTE(Hoej): 1024 might be too much for a header backing, unless somebody has really long paths.
     buf := strings.builder_from_slice(backing[:]);
 

core/log/log.odin

@@ -125,6 +125,6 @@ log :: proc(level : Level, args : ..any, location := #caller_location) {
 logf :: proc(level : Level, fmt_str : string, args : ..any, location := #caller_location) {
 	logger := context.logger;
 	if level < logger.lowest_level do return;
-	str := len(args) > 0 ? fmt.tprintf(fmt_str, ..args) : fmt.tprint(fmt_str); //NOTE(Hoej): While tprint isn't thread-safe, no logging is.
+	str := fmt.tprintf(fmt_str, ..args) if len(args) > 0 else fmt.tprint(fmt_str); //NOTE(Hoej): While tprint isn't thread-safe, no logging is.
 	logger.procedure(logger.data, level, str, logger.options, location);
 }

core/math/linalg/general.odin

@@ -54,11 +54,11 @@ normalize :: proc{vector_normalize, quaternion_normalize};
 
 vector_normalize0 :: proc(v: $T/[$N]$E) -> T where IS_NUMERIC(E) {
 	m := length(v);
-	return m == 0 ? 0 : v/m;
+	return 0 if m == 0 else v/m;
 }
 quaternion_normalize0 :: proc(q: $Q) -> Q  where IS_QUATERNION(Q) {
 	m := abs(q);
-	return m == 0 ? 0 : q/m;
+	return 0 if m == 0 else q/m;
 }
 normalize0 :: proc{vector_normalize0, quaternion_normalize0};
 
@@ -258,7 +258,7 @@ vector_mix :: proc(x, y, a: $V/[$N]$E) -> V where IS_NUMERIC(E) {
 vector_step :: proc(edge, x: $V/[$N]$E) -> V where IS_NUMERIC(E) {
 	s: V;
 	for i in 0..<N {
-		s[i] = x[i] < edge[i] ? 0 : 1;
+		s[i] = 0 if x[i] < edge[i] else 1;
 	}
 	return s;
 }

core/math/linalg/specific.odin

@@ -8,7 +8,7 @@ import "intrinsics"
 
 Float :: f32;
 
-FLOAT_EPSILON :: size_of(Float) == 4 ? 1e-7 : 1e-15;
+FLOAT_EPSILON :: 1e-7 when size_of(Float) == 4 else 1e-15;
 
 Vector2 :: distinct [2]Float;
 Vector3 :: distinct [3]Float;
@@ -39,7 +39,7 @@ Matrix2 :: Matrix2x2;
 Matrix3 :: Matrix3x3;
 Matrix4 :: Matrix4x4;
 
-Quaternion :: distinct (size_of(Float) == size_of(f32) ? quaternion128 : quaternion256);
+Quaternion :: distinct (quaternion128 when size_of(Float) == size_of(f32) else quaternion256);
 
 MATRIX1_IDENTITY :: Matrix1{{1}};
 MATRIX2_IDENTITY :: Matrix2{{1, 0}, {0, 1}};
@@ -71,8 +71,20 @@ vector3_orthogonal :: proc(v: Vector3) -> Vector3 {
 	y := abs(v.y);
 	z := abs(v.z);
 
-	other: Vector3 = x < y ? (x < z ? {1, 0, 0} : {0, 0, 1}) : (y < z ? {0, 1, 0} : {0, 0, 1});
+	other: Vector3;
-
+	if x < y {
+		if x < z {
+			other = {1, 0, 0};
+		} else {
+			other = {0, 0, 1};
+		}
+	} else {
+		if y < z {
+			other = {0, 1, 0};
+		} else {
+			other = {0, 0, 1};
+		}
+	}
 	return normalize(cross(v, other));
 }
 
@@ -124,7 +136,7 @@ vector4_hsl_to_rgb :: proc(h, s, l: Float, a: Float = 1) -> Vector4 {
 		g = l;
 		b = l;
 	} else {
-		q := l < 0.5 ? l * (1+s) : l+s - l*s;
+		q := l * (1+s) if l < 0.5 else l+s - l*s;
 		p := 2*l - q;
 		r = hue_to_rgb(p, q, h + 1.0/3.0);
 		g = hue_to_rgb(p, q, h);
@@ -147,10 +159,10 @@ vector4_rgb_to_hsl :: proc(col: Vector4) -> Vector4 {
 
 	if v_max != v_min {
 		d: = v_max - v_min;
-		s = l > 0.5 ? d / (2.0 - v_max - v_min) : d / (v_max + v_min);
+		s = d / (2.0 - v_max - v_min) if l > 0.5 else d / (v_max + v_min);
 		switch {
 		case v_max == r:
-			h = (g - b) / d + (g < b ? 6.0 : 0.0);
+			h = (g - b) / d + (6.0 if g < b else 0.0);
 		case v_max == g:
 			h = (b - r) / d + 2.0;
 		case v_max == b:
@@ -627,9 +639,9 @@ matrix4_inverse :: proc(m: Matrix4) -> Matrix4 {
 matrix4_minor :: proc(m: Matrix4, c, r: int) -> Float {
 	cut_down: Matrix3;
 	for i in 0..<3 {
-		col := i < c ? i : i+1;
+		col := i if i < c else i+1;
 		for j in 0..<3 {
-			row := j < r ? j : j+1;
+			row := j if j < r else j+1;
 			cut_down[i][j] = m[col][row];
 		}
 	}
@@ -638,7 +650,7 @@ matrix4_minor :: proc(m: Matrix4, c, r: int) -> Float {
 
 matrix4_cofactor :: proc(m: Matrix4, c, r: int) -> Float {
 	sign, minor: Float;
-	sign = (c + r) % 2 == 0 ? 1 : -1;
+	sign = 1 if (c + r) % 2 == 0 else -1;
 	minor = matrix4_minor(m, c, r);
 	return sign * minor;
 }

core/math/math.odin

@@ -115,7 +115,7 @@ unlerp     :: proc{unlerp_f32, unlerp_f64};
 
 wrap :: proc(x, y: $T) -> T where intrinsics.type_is_numeric(T), !intrinsics.type_is_array(T) {
 	tmp := mod(x, y);
-	return tmp < 0 ? wrap + tmp : tmp;
+	return wrap + tmp if tmp < 0 else tmp;
 }
 angle_diff :: proc(a, b: $T) -> T where intrinsics.type_is_numeric(T), !intrinsics.type_is_array(T) {
 
@@ -128,7 +128,7 @@ angle_lerp :: proc(a, b, t: $T) -> T where intrinsics.type_is_numeric(T), !intri
 }
 
 step :: proc(edge, x: $T) -> T where intrinsics.type_is_numeric(T), !intrinsics.type_is_array(T) {
-	return x < edge ? 0 : 1;
+	return 0 if x < edge else 1;
 }
 
 smoothstep :: proc(edge0, edge1, x: $T) -> T where intrinsics.type_is_numeric(T), !intrinsics.type_is_array(T) {
@@ -246,10 +246,10 @@ trunc_f64 :: proc(x: f64) -> f64 {
 trunc :: proc{trunc_f32, trunc_f64};
 
 round_f32 :: proc(x: f32) -> f32 {
-	return x < 0 ? ceil(x - 0.5) : floor(x + 0.5);
+	return ceil(x - 0.5) if x < 0 else floor(x + 0.5);
 }
 round_f64 :: proc(x: f64) -> f64 {
-	return x < 0 ? ceil(x - 0.5) : floor(x + 0.5);
+	return ceil(x - 0.5) if x < 0 else floor(x + 0.5);
 }
 round :: proc{round_f32, round_f64};
 

core/odin/ast/ast.odin

@@ -200,6 +200,24 @@ Ternary_Expr :: struct {
 	y:    ^Expr,
 }
 
+Ternary_If_Expr :: struct {
+	using node: Expr,
+	x: ^Expr,
+	op1:  tokenizer.Token,
+	cond:    ^Expr,
+	op2:  tokenizer.Token,
+	y:    ^Expr,
+}
+
+Ternary_When_Expr :: struct {
+	using node: Expr,
+	x: ^Expr,
+	op1:  tokenizer.Token,
+	cond:    ^Expr,
+	op2:  tokenizer.Token,
+	y:    ^Expr,
+}
+
 Type_Assertion :: struct {
 	using node: Expr,
 	expr:  ^Expr,

core/odin/parser/parser.odin

@@ -1028,7 +1028,7 @@ parse_stmt :: proc(p: ^Parser) -> ^ast.Stmt {
 		if tok.kind != .Fallthrough && p.curr_tok.kind == .Ident {
 			label = parse_ident(p);
 		}
-		end := label != nil ? label.end : end_pos(tok);
+		end := label.end if label != nil else end_pos(tok);
 		s := ast.new(ast.Branch_Stmt, tok.pos, end);
 		expect_semicolon(p, s);
 		return s;
@@ -1132,6 +1132,8 @@ parse_stmt :: proc(p: ^Parser) -> ^ast.Stmt {
 token_precedence :: proc(p: ^Parser, kind: tokenizer.Token_Kind) -> int {
 	#partial switch kind {
 	case .Question:
+	case .If:
+	case .When:
 		return 1;
 	case .Ellipsis, .Range_Half:
 		if !p.allow_range {
@@ -2453,7 +2455,7 @@ parse_literal_value :: proc(p: ^Parser, type: ^ast.Expr) -> ^ast.Comp_Lit {
 
 	close := expect_token_after(p, .Close_Brace, "compound literal");
 
-	pos := type != nil ? type.pos : open.pos;
+	pos := type.pos if type != nil else open.pos;
 	lit := ast.new(ast.Comp_Lit, pos, end_pos(close));
 	lit.type  = type;
 	lit.open  = open.pos;
@@ -2714,6 +2716,13 @@ parse_binary_expr :: proc(p: ^Parser, lhs: bool, prec_in: int) -> ^ast.Expr {
 			if op_prec != prec {
 				break;
 			}
+			if op.kind == .If || op.kind == .When {
+				if p.prev_tok.pos.line < op.pos.line {
+					// NOTE(bill): Check to see if the `if` or `when` is on the same line of the `lhs` condition
+					break;
+				}
+			}
+
 			expect_operator(p);
 
 			if op.kind == .Question {
@@ -2728,6 +2737,32 @@ parse_binary_expr :: proc(p: ^Parser, lhs: bool, prec_in: int) -> ^ast.Expr {
 				te.op2  = colon;
 				te.y    = y;
 
+				expr = te;
+			} else if op.kind == .If {
+				x := expr;
+				cond := parse_expr(p, lhs);
+				else_tok := expect_token(p, .Else);
+				y := parse_expr(p, lhs);
+				te := ast.new(ast.Ternary_If_Expr, expr.pos, end_pos(p.prev_tok));
+				te.x    = x;
+				te.op1  = op;
+				te.cond = cond;
+				te.op2  = else_tok;
+				te.y    = y;
+
+				expr = te;
+			} else if op.kind == .When {
+				x := expr;
+				cond := parse_expr(p, lhs);
+				op2 := expect_token(p, .Else);
+				y := parse_expr(p, lhs);
+				te := ast.new(ast.Ternary_When_Expr, expr.pos, end_pos(p.prev_tok));
+				te.x    = x;
+				te.op1  = op;
+				te.cond = cond;
+				te.op2  = else_tok;
+				te.y    = y;
+
 				expr = te;
 			} else {
 				right := parse_binary_expr(p, false, prec+1);

core/odin/tokenizer/token.odin

@@ -17,13 +17,13 @@ Pos :: struct {
 
 pos_compare :: proc(lhs, rhs: Pos) -> int {
 	if lhs.offset != rhs.offset {
-		return (lhs.offset < rhs.offset) ? -1 : +1;
+		return -1 if (lhs.offset < rhs.offset) else +1;
 	}
 	if lhs.line != rhs.line {
-		return (lhs.line < rhs.line) ? -1 : +1;
+		return -1 if (lhs.line < rhs.line) else +1;
 	}
 	if lhs.column != rhs.column {
-		return (lhs.column < rhs.column) ? -1 : +1;
+		return -1 if (lhs.column < rhs.column) else +1;
 	}
 	return strings.compare(lhs.file, rhs.file);
 }

core/reflect/types.odin

@@ -321,7 +321,7 @@ write_type :: proc(buf: ^strings.Builder, ti: ^rt.Type_Info) {
 		case uint:    write_string(buf, "uint");
 		case uintptr: write_string(buf, "uintptr");
 		case:
-			write_byte(buf, info.signed ? 'i' : 'u');
+			write_byte(buf, 'i' if info.signed else 'u');
 			write_i64(buf, i64(8*ti.size), 10);
 			switch info.endianness {
 			case .Platform: // Okay

core/runtime/internal.odin

@@ -191,7 +191,7 @@ print_type :: proc(fd: os.Handle, ti: ^Type_Info) {
 		case uint:    os.write_string(fd, "uint");
 		case uintptr: os.write_string(fd, "uintptr");
 		case:
-			os.write_byte(fd, info.signed ? 'i' : 'u');
+			os.write_byte(fd, 'i' if info.signed else 'u');
 			print_u64(fd, u64(8*ti.size));
 		}
 	case Type_Info_Rune:
@@ -421,7 +421,7 @@ memory_compare :: proc "contextless" (a, b: rawptr, n: int) -> int #no_bounds_ch
 				a := (^byte)(x+pos)^;
 				b := (^byte)(y+pos)^;
 				if a ~ b != 0 {
-					return (int(a) - int(b)) < 0 ? -1 : +1;
+					return -1 if (int(a) - int(b)) < 0 else +1;
 				}
 			}
 		}
@@ -431,7 +431,7 @@ memory_compare :: proc "contextless" (a, b: rawptr, n: int) -> int #no_bounds_ch
 		a := (^byte)(x+offset)^;
 		b := (^byte)(y+offset)^;
 		if a ~ b != 0 {
-			return (int(a) - int(b)) < 0 ? -1 : +1;
+			return -1 if (int(a) - int(b)) < 0 else +1;
 		}
 	}
 
@@ -456,7 +456,7 @@ memory_compare_zero :: proc "contextless" (a: rawptr, n: int) -> int #no_bounds_
 			for pos := curr_block*SU; pos < n; pos += 1 {
 				a := (^byte)(x+pos)^;
 				if a ~ 0 != 0 {
-					return int(a) < 0 ? -1 : +1;
+					return -1 if int(a) < 0 else +1;
 				}
 			}
 		}
@@ -465,7 +465,7 @@ memory_compare_zero :: proc "contextless" (a: rawptr, n: int) -> int #no_bounds_
 	for /**/; offset < n; offset += 1 {
 		a := (^byte)(x+offset)^;
 		if a ~ 0 != 0 {
-			return int(a) < 0 ? -1 : +1;
+			return -1 if int(a) < 0 else +1;
 		}
 	}
 

core/strconv/generic_float.odin

@@ -110,7 +110,7 @@ format_digits :: proc(buf: []byte, shortest: bool, neg: bool, digs: Decimal_Slic
 
 	switch fmt {
 	case 'f', 'F':
-		add_bytes(&b, neg ? '-' : '+');
+		add_bytes(&b, '-' if neg else '+');
 
 		// integer, padded with zeros when needed
 		if digs.decimal_point > 0 {
@@ -138,7 +138,7 @@ format_digits :: proc(buf: []byte, shortest: bool, neg: bool, digs: Decimal_Slic
 		return to_bytes(b);
 
 	case 'e', 'E':
-		add_bytes(&b, neg ? '-' : '+');
+		add_bytes(&b, '-' if neg else '+');
 
 		ch := byte('0');
 		if digs.count != 0 {

core/strings/strings.odin

@@ -325,7 +325,7 @@ last_index :: proc(s, substr: string) -> int {
 	case n == 1:
 		return last_index_byte(s, substr[0]);
 	case n == len(s):
-		return substr == s ? 0 : -1;
+		return 0 if substr == s else -1;
 	case n > len(s):
 		return -1;
 	}

core/time/time.odin

@@ -92,7 +92,7 @@ duration_round :: proc(d, m: Duration) -> Duration {
 	return MAX_DURATION;
 }
 duration_truncate :: proc(d, m: Duration) -> Duration {
-	return m <= 0 ? d : d - d%m;
+	return d if m <= 0 else d - d%m;
 }
 
 

src/check_expr.cpp

@@ -7763,6 +7763,99 @@ ExprKind check_expr_base_internal(CheckerContext *c, Operand *o, Ast *node, Type
 
 	case_end;
 
+	case_ast_node(te, TernaryIfExpr, node);
+		Operand cond = {Addressing_Invalid};
+		check_expr(c, &cond, te->cond);
+		node->viral_state_flags |= te->cond->viral_state_flags;
+
+		if (cond.mode != Addressing_Invalid && !is_type_boolean(cond.type)) {
+			error(te->cond, "Non-boolean condition in ternary if expression");
+		}
+
+		Operand x = {Addressing_Invalid};
+		Operand y = {Addressing_Invalid};
+		check_expr_or_type(c, &x, te->x, type_hint);
+		node->viral_state_flags |= te->x->viral_state_flags;
+
+		if (te->y != nullptr) {
+			check_expr_or_type(c, &y, te->y, type_hint);
+			node->viral_state_flags |= te->y->viral_state_flags;
+		} else {
+			error(node, "A ternary expression must have an else clause");
+			return kind;
+		}
+
+		if (x.type == nullptr || x.type == t_invalid ||
+		    y.type == nullptr || y.type == t_invalid) {
+			return kind;
+		}
+
+		convert_to_typed(c, &x, y.type);
+		if (x.mode == Addressing_Invalid) {
+			return kind;
+		}
+		convert_to_typed(c, &y, x.type);
+		if (y.mode == Addressing_Invalid) {
+			x.mode = Addressing_Invalid;
+			return kind;
+		}
+
+		if (!ternary_compare_types(x.type, y.type)) {
+			gbString its = type_to_string(x.type);
+			gbString ets = type_to_string(y.type);
+			error(node, "Mismatched types in ternary if expression, %s vs %s", its, ets);
+			gb_string_free(ets);
+			gb_string_free(its);
+			return kind;
+		}
+
+		Type *type = x.type;
+		if (is_type_untyped_nil(type) || is_type_untyped_undef(type)) {
+			type = y.type;
+		}
+
+		o->type = type;
+		o->mode = Addressing_Value;
+
+		// if (cond.mode == Addressing_Constant && is_type_boolean(cond.type) &&
+		//     x.mode == Addressing_Constant &&
+		//     y.mode == Addressing_Constant) {
+
+		// 	o->mode = Addressing_Constant;
+
+		// 	if (cond.value.value_bool) {
+		// 		o->value = x.value;
+		// 	} else {
+		// 		o->value = y.value;
+		// 	}
+		// }
+
+	case_end;
+
+	case_ast_node(te, TernaryWhenExpr, node);
+		Operand cond = {};
+		check_expr(c, &cond, te->cond);
+		node->viral_state_flags |= te->cond->viral_state_flags;
+
+		if (cond.mode != Addressing_Constant || !is_type_boolean(cond.type)) {
+			error(te->cond, "Expected a constant boolean condition in ternary when expression");
+			return kind;
+		}
+
+		if (cond.value.value_bool) {
+			check_expr_or_type(c, o, te->x, type_hint);
+			node->viral_state_flags |= te->x->viral_state_flags;
+		} else {
+			if (te->y != nullptr) {
+				check_expr_or_type(c, o, te->y, type_hint);
+				node->viral_state_flags |= te->y->viral_state_flags;
+			} else {
+				error(node, "A ternary when expression must have an else clause");
+				return kind;
+			}
+		}
+	case_end;
+
 	case_ast_node(cl, CompoundLit, node);
 		Type *type = type_hint;
 		bool is_to_be_determined_array_count = false;
@@ -9334,6 +9427,22 @@ gbString write_expr_to_string(gbString str, Ast *node) {
 		str = write_expr_to_string(str, te->y);
 	case_end;
 
+	case_ast_node(te, TernaryIfExpr, node);
+		str = write_expr_to_string(str, te->x);
+		str = gb_string_appendc(str, " if ");
+		str = write_expr_to_string(str, te->cond);
+		str = gb_string_appendc(str, " else ");
+		str = write_expr_to_string(str, te->y);
+	case_end;
+
+	case_ast_node(te, TernaryWhenExpr, node);
+		str = write_expr_to_string(str, te->x);
+		str = gb_string_appendc(str, " when ");
+		str = write_expr_to_string(str, te->cond);
+		str = gb_string_appendc(str, " else ");
+		str = write_expr_to_string(str, te->y);
+	case_end;
+
 
 	case_ast_node(pe, ParenExpr, node);
 		str = gb_string_append_rune(str, '(');

src/check_type.cpp

@@ -3454,6 +3454,26 @@ bool check_type_internal(CheckerContext *ctx, Ast *e, Type **type, Type *named_t
 			return true;
 		}
 	case_end;
+
+	case_ast_node(te, TernaryIfExpr, e);
+		Operand o = {};
+		check_expr_or_type(ctx, &o, e);
+		if (o.mode == Addressing_Type) {
+			*type = o.type;
+			set_base_type(named_type, *type);
+			return true;
+		}
+	case_end;
+
+	case_ast_node(te, TernaryWhenExpr, e);
+		Operand o = {};
+		check_expr_or_type(ctx, &o, e);
+		if (o.mode == Addressing_Type) {
+			*type = o.type;
+			set_base_type(named_type, *type);
+			return true;
+		}
+	case_end;
 	}
 
 	*type = t_invalid;

src/ir.cpp

@@ -3103,11 +3103,6 @@ irValue *ir_find_or_generate_context_ptr(irProcedure *proc) {
 		return proc->context_stack[proc->context_stack.count-1].value;
 	}
 
-	irBlock *tmp_block = proc->curr_block;
-	proc->curr_block = proc->blocks[0];
-
-	defer (proc->curr_block = tmp_block);
-
 	irValue *c = ir_add_local_generated(proc, t_context, true);
 	ir_push_context_onto_stack(proc, c);
 	ir_emit_store(proc, c, ir_emit_load(proc, proc->module->global_default_context));
@@ -3301,9 +3296,11 @@ void ir_emit_defer_stmts(irProcedure *proc, irDeferExitKind kind, irBlock *block
 	isize i = count;
 	while (i --> 0) {
 		irDefer d = proc->defer_stmts[i];
-		if (proc->context_stack.count >= d.context_stack_count) {
+
-			proc->context_stack.count = d.context_stack_count;
+		// TODO(bill, 2020-03-05): Why was this added?
-		}
+		// if (proc->context_stack.count >= d.context_stack_count) {
+		// 	proc->context_stack.count = d.context_stack_count;
+		// }
 
 		if (kind == irDeferExit_Default) {
 			if (proc->scope_index == d.scope_index &&
@@ -7161,6 +7158,49 @@ irValue *ir_build_expr_internal(irProcedure *proc, Ast *expr) {
 		return ir_emit(proc, ir_instr_phi(proc, edges, type));
 	case_end;
 
+	case_ast_node(te, TernaryIfExpr, expr);
+		ir_emit_comment(proc, str_lit("TernaryIfExpr"));
+
+		auto edges = array_make<irValue *>(ir_allocator(), 0, 2);
+
+		GB_ASSERT(te->y != nullptr);
+		irBlock *then  = ir_new_block(proc, nullptr, "if.then");
+		irBlock *done  = ir_new_block(proc, nullptr, "if.done"); // NOTE(bill): Append later
+		irBlock *else_ = ir_new_block(proc, nullptr, "if.else");
+
+		irValue *cond = ir_build_cond(proc, te->cond, then, else_);
+		ir_start_block(proc, then);
+
+		Type *type = type_of_expr(expr);
+
+		ir_open_scope(proc);
+		array_add(&edges, ir_emit_conv(proc, ir_build_expr(proc, te->x), type));
+		ir_close_scope(proc, irDeferExit_Default, nullptr);
+
+		ir_emit_jump(proc, done);
+		ir_start_block(proc, else_);
+
+		ir_open_scope(proc);
+		array_add(&edges, ir_emit_conv(proc, ir_build_expr(proc, te->y), type));
+		ir_close_scope(proc, irDeferExit_Default, nullptr);
+
+		ir_emit_jump(proc, done);
+		ir_start_block(proc, done);
+
+		return ir_emit(proc, ir_instr_phi(proc, edges, type));
+	case_end;
+
+	case_ast_node(te, TernaryWhenExpr, expr);
+		TypeAndValue tav = type_and_value_of_expr(te->cond);
+		GB_ASSERT(tav.mode == Addressing_Constant);
+		GB_ASSERT(tav.value.kind == ExactValue_Bool);
+		if (tav.value.value_bool) {
+			return ir_build_expr(proc, te->x);
+		} else {
+			return ir_build_expr(proc, te->y);
+		}
+	case_end;
+
 	case_ast_node(ta, TypeAssertion, expr);
 		TokenPos pos = ast_token(expr).pos;
 		Type *type = tv.type;

src/parser.cpp

@@ -35,6 +35,8 @@ Token ast_token(Ast *node) {
 	case Ast_FieldValue:         return node->FieldValue.eq;
 	case Ast_DerefExpr:          return node->DerefExpr.op;
 	case Ast_TernaryExpr:        return ast_token(node->TernaryExpr.cond);
+	case Ast_TernaryIfExpr:      return ast_token(node->TernaryIfExpr.x);
+	case Ast_TernaryWhenExpr:    return ast_token(node->TernaryWhenExpr.x);
 	case Ast_TypeAssertion:      return ast_token(node->TypeAssertion.expr);
 	case Ast_TypeCast:           return node->TypeCast.token;
 	case Ast_AutoCast:           return node->AutoCast.token;
@@ -198,6 +200,16 @@ Ast *clone_ast(Ast *node) {
 		n->TernaryExpr.x    = clone_ast(n->TernaryExpr.x);
 		n->TernaryExpr.y    = clone_ast(n->TernaryExpr.y);
 		break;
+	case Ast_TernaryIfExpr:
+		n->TernaryIfExpr.x    = clone_ast(n->TernaryIfExpr.x);
+		n->TernaryIfExpr.cond = clone_ast(n->TernaryIfExpr.cond);
+		n->TernaryIfExpr.y    = clone_ast(n->TernaryIfExpr.y);
+		break;
+	case Ast_TernaryWhenExpr:
+		n->TernaryWhenExpr.x    = clone_ast(n->TernaryWhenExpr.x);
+		n->TernaryWhenExpr.cond = clone_ast(n->TernaryWhenExpr.cond);
+		n->TernaryWhenExpr.y    = clone_ast(n->TernaryWhenExpr.y);
+		break;
 	case Ast_TypeAssertion:
 		n->TypeAssertion.expr = clone_ast(n->TypeAssertion.expr);
 		n->TypeAssertion.type = clone_ast(n->TypeAssertion.type);
@@ -638,6 +650,21 @@ Ast *ast_ternary_expr(AstFile *f, Ast *cond, Ast *x, Ast *y) {
 	result->TernaryExpr.y = y;
 	return result;
 }
+Ast *ast_ternary_if_expr(AstFile *f, Ast *x, Ast *cond, Ast *y) {
+	Ast *result = alloc_ast_node(f, Ast_TernaryIfExpr);
+	result->TernaryIfExpr.x = x;
+	result->TernaryIfExpr.cond = cond;
+	result->TernaryIfExpr.y = y;
+	return result;
+}
+Ast *ast_ternary_when_expr(AstFile *f, Ast *x, Ast *cond, Ast *y) {
+	Ast *result = alloc_ast_node(f, Ast_TernaryWhenExpr);
+	result->TernaryWhenExpr.x = x;
+	result->TernaryWhenExpr.cond = cond;
+	result->TernaryWhenExpr.y = y;
+	return result;
+}
+
 Ast *ast_type_assertion(AstFile *f, Ast *expr, Token dot, Ast *type) {
 	Ast *result = alloc_ast_node(f, Ast_TypeAssertion);
 	result->TypeAssertion.expr = expr;
@@ -1199,6 +1226,8 @@ Token expect_operator(AstFile *f) {
 	Token prev = f->curr_token;
 	if ((prev.kind == Token_in || prev.kind == Token_not_in) && (f->expr_level >= 0 || f->allow_in_expr)) {
 		// okay
+	} else if (prev.kind == Token_if || prev.kind == Token_when) {
+		// okay
 	} else if (!gb_is_between(prev.kind, Token__OperatorBegin+1, Token__OperatorEnd-1)) {
 		syntax_error(f->curr_token, "Expected an operator, got '%.*s'",
 		             LIT(token_strings[prev.kind]));
@@ -2512,6 +2541,8 @@ bool is_ast_range(Ast *expr) {
 i32 token_precedence(AstFile *f, TokenKind t) {
 	switch (t) {
 	case Token_Question:
+	case Token_if:
+	case Token_when:
 		return 1;
 	case Token_Ellipsis:
 	case Token_RangeHalf:
@@ -2565,6 +2596,14 @@ Ast *parse_binary_expr(AstFile *f, bool lhs, i32 prec_in) {
 				// NOTE(bill): This will also catch operators that are not valid "binary" operators
 				break;
 			}
+			if (op.kind == Token_if || op.kind == Token_when) {
+				Token prev = f->prev_token;
+				if (prev.pos.line < op.pos.line) {
+					// NOTE(bill): Check to see if the `if` or `when` is on the same line of the `lhs` condition
+					break;
+				}
+			}
+
 			expect_operator(f); // NOTE(bill): error checks too
 
 			if (op.kind == Token_Question) {
@@ -2574,6 +2613,20 @@ Ast *parse_binary_expr(AstFile *f, bool lhs, i32 prec_in) {
 				Token token_c = expect_token(f, Token_Colon);
 				Ast *y = parse_expr(f, lhs);
 				expr = ast_ternary_expr(f, cond, x, y);
+			} else if (op.kind == Token_if) {
+				Ast *x = expr;
+				// Token_if
+				Ast *cond = parse_expr(f, lhs);
+				Token tok_else = expect_token(f, Token_else);
+				Ast *y = parse_expr(f, lhs);
+				expr = ast_ternary_if_expr(f, x, cond, y);
+			} else if (op.kind == Token_when) {
+				Ast *x = expr;
+				// Token_when
+				Ast *cond = parse_expr(f, lhs);
+				Token tok_else = expect_token(f, Token_else);
+				Ast *y = parse_expr(f, lhs);
+				expr = ast_ternary_when_expr(f, x, cond, y);
 			} else {
 				Ast *right = parse_binary_expr(f, false, prec+1);
 				if (right == nullptr) {

src/parser.hpp

@@ -283,8 +283,10 @@ AST_KIND(_ExprBegin,  "",  bool) \
 		Token        ellipsis; \
 		ProcInlining inlining; \
 	}) \
-	AST_KIND(FieldValue,    "field value",         struct { Token eq; Ast *field, *value; }) \
+	AST_KIND(FieldValue,      "field value",              struct { Token eq; Ast *field, *value; }) \
-	AST_KIND(TernaryExpr,   "ternary expression",  struct { Ast *cond, *x, *y; }) \
+	AST_KIND(TernaryExpr,     "ternary expression",       struct { Ast *cond, *x, *y; }) \
+	AST_KIND(TernaryIfExpr,   "ternary if expression",    struct { Ast *x, *cond, *y; }) \
+	AST_KIND(TernaryWhenExpr, "ternary when expression",  struct { Ast *x, *cond, *y; }) \
 	AST_KIND(TypeAssertion, "type assertion",      struct { Ast *expr; Token dot; Ast *type; }) \
 	AST_KIND(TypeCast,      "type cast",           struct { Token token; Ast *type, *expr; }) \
 	AST_KIND(AutoCast,      "auto_cast",           struct { Token token; Ast *expr; }) \