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parse pointers in function pointer declarations always as optional

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This commit is contained in:
Robin Voetter
2021-12-17 20:13:19 +01:00
parent c169871f96
commit 7c2d1d466b
2 changed files with 19 additions and 19 deletions
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28
generator/vulkan/c_parse.zig
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@@ -241,9 +241,9 @@ pub const XmlCTokenizer = struct {
};
// TYPEDEF = kw_typedef DECLARATION ';'
pub fn parseTypedef(allocator: Allocator, xctok: *XmlCTokenizer) !registry.Declaration {
pub fn parseTypedef(allocator: Allocator, xctok: *XmlCTokenizer, ptrs_optional: bool) !registry.Declaration {
_ = try xctok.expect(.kw_typedef);
const decl = try parseDeclaration(allocator, xctok);
const decl = try parseDeclaration(allocator, xctok, ptrs_optional);
_ = try xctok.expect(.semicolon);
if (try xctok.peek()) |_| {
return error.InvalidSyntax;
@@ -256,8 +256,8 @@ pub fn parseTypedef(allocator: Allocator, xctok: *XmlCTokenizer) !registry.Decla
}
// MEMBER = DECLARATION (':' int)?
pub fn parseMember(allocator: Allocator, xctok: *XmlCTokenizer) !registry.Container.Field {
const decl = try parseDeclaration(allocator, xctok);
pub fn parseMember(allocator: Allocator, xctok: *XmlCTokenizer, ptrs_optional: bool) !registry.Container.Field {
const decl = try parseDeclaration(allocator, xctok, ptrs_optional);
var field = registry.Container.Field{
.name = decl.name orelse return error.MissingTypeIdentifier,
.field_type = decl.decl_type,
@@ -284,8 +284,8 @@ pub fn parseMember(allocator: Allocator, xctok: *XmlCTokenizer) !registry.Contai
return field;
}
pub fn parseParamOrProto(allocator: Allocator, xctok: *XmlCTokenizer) !registry.Declaration {
const decl = try parseDeclaration(allocator, xctok);
pub fn parseParamOrProto(allocator: Allocator, xctok: *XmlCTokenizer, ptrs_optional: bool) !registry.Declaration {
const decl = try parseDeclaration(allocator, xctok, ptrs_optional);
if (try xctok.peek()) |_| {
return error.InvalidSyntax;
}
@@ -315,7 +315,7 @@ pub const ParseError = error{
// DECLARATION = kw_const? type_name DECLARATOR
// DECLARATOR = POINTERS (id | name)? ('[' ARRAY_DECLARATOR ']')*
// | POINTERS '(' FNPTRSUFFIX
fn parseDeclaration(allocator: Allocator, xctok: *XmlCTokenizer) ParseError!Declaration {
fn parseDeclaration(allocator: Allocator, xctok: *XmlCTokenizer, ptrs_optional: bool) ParseError!Declaration {
// Parse declaration constness
var tok = try xctok.nextNoEof();
const inner_is_const = tok.kind == .kw_const;
@@ -333,11 +333,11 @@ fn parseDeclaration(allocator: Allocator, xctok: *XmlCTokenizer) ParseError!Decl
var type_info = TypeInfo{ .name = type_name };
// Parse pointers
type_info = try parsePointers(allocator, xctok, inner_is_const, type_info);
type_info = try parsePointers(allocator, xctok, inner_is_const, type_info, ptrs_optional);
// Parse name / fn ptr
if (try parseFnPtrSuffix(allocator, xctok, type_info)) |decl| {
if (try parseFnPtrSuffix(allocator, xctok, type_info, ptrs_optional)) |decl| {
return decl;
}
@@ -377,7 +377,7 @@ fn parseDeclaration(allocator: Allocator, xctok: *XmlCTokenizer) ParseError!Decl
}
// FNPTRSUFFIX = kw_vkapi_ptr '*' name' ')' '(' ('void' | (DECLARATION (',' DECLARATION)*)?) ')'
fn parseFnPtrSuffix(allocator: Allocator, xctok: *XmlCTokenizer, return_type: TypeInfo) !?Declaration {
fn parseFnPtrSuffix(allocator: Allocator, xctok: *XmlCTokenizer, return_type: TypeInfo, ptrs_optional: bool) !?Declaration {
const lparen = try xctok.peek();
if (lparen == null or lparen.?.kind != .lparen) {
return null;
@@ -404,7 +404,7 @@ fn parseFnPtrSuffix(allocator: Allocator, xctok: *XmlCTokenizer, return_type: Ty
},
};
const first_param = try parseDeclaration(allocator, xctok);
const first_param = try parseDeclaration(allocator, xctok, ptrs_optional);
if (first_param.name == null) {
if (first_param.decl_type != .name or !mem.eql(u8, first_param.decl_type.name, "void")) {
return error.InvalidSyntax;
@@ -431,7 +431,7 @@ fn parseFnPtrSuffix(allocator: Allocator, xctok: *XmlCTokenizer, return_type: Ty
else => return error.InvalidSyntax,
}
const decl = try parseDeclaration(allocator, xctok);
const decl = try parseDeclaration(allocator, xctok, ptrs_optional);
try params.append(.{
.name = decl.name orelse return error.MissingTypeIdentifier,
.param_type = decl.decl_type,
@@ -445,7 +445,7 @@ fn parseFnPtrSuffix(allocator: Allocator, xctok: *XmlCTokenizer, return_type: Ty
}
// POINTERS = (kw_const? '*')*
fn parsePointers(allocator: Allocator, xctok: *XmlCTokenizer, inner_const: bool, inner: TypeInfo) !TypeInfo {
fn parsePointers(allocator: Allocator, xctok: *XmlCTokenizer, inner_const: bool, inner: TypeInfo, ptrs_optional: bool) !TypeInfo {
var type_info = inner;
var first_const = inner_const;
@@ -474,7 +474,7 @@ fn parsePointers(allocator: Allocator, xctok: *XmlCTokenizer, inner_const: bool,
type_info = .{
.pointer = .{
.is_const = is_const or first_const,
.is_optional = false, // set elsewhere
.is_optional = ptrs_optional, // set elsewhere
.size = .one, // set elsewhere
.child = child,
},