Sema: add error for non-comptime param in comptime func

Adds error for taking a non comptime parameter in a function returning a
comptime-only type but not when that type is dependent on a parameter.

Co-authored-by: Veikka Tuominen <git@vexu.eu>

lib/std/c.zig

@@ -20,7 +20,7 @@ pub const Tokenizer = tokenizer.Tokenizer;
 /// If linking gnu libc (glibc), the `ok` value will be true if the target
 /// version is greater than or equal to `glibc_version`.
 /// If linking a libc other than these, returns `false`.
-pub fn versionCheck(glibc_version: std.builtin.Version) type {
+pub fn versionCheck(comptime glibc_version: std.builtin.Version) type {
     return struct {
         pub const ok = blk: {
             if (!builtin.link_libc) break :blk false;

lib/std/elf.zig

@@ -406,7 +406,7 @@ pub const Header = struct {
     }
 };
 
-pub fn ProgramHeaderIterator(ParseSource: anytype) type {
+pub fn ProgramHeaderIterator(comptime ParseSource: anytype) type {
     return struct {
         elf_header: Header,
         parse_source: ParseSource,
@@ -456,7 +456,7 @@ pub fn ProgramHeaderIterator(ParseSource: anytype) type {
     };
 }
 
-pub fn SectionHeaderIterator(ParseSource: anytype) type {
+pub fn SectionHeaderIterator(comptime ParseSource: anytype) type {
     return struct {
         elf_header: Header,
         parse_source: ParseSource,

lib/std/io/bit_reader.zig

@@ -7,7 +7,7 @@ const meta = std.meta;
 const math = std.math;
 
 /// Creates a stream which allows for reading bit fields from another stream
-pub fn BitReader(endian: std.builtin.Endian, comptime ReaderType: type) type {
+pub fn BitReader(comptime endian: std.builtin.Endian, comptime ReaderType: type) type {
     return struct {
         forward_reader: ReaderType,
         bit_buffer: u7,

lib/std/io/bit_writer.zig

@@ -7,7 +7,7 @@ const meta = std.meta;
 const math = std.math;
 
 /// Creates a stream which allows for writing bit fields to another stream
-pub fn BitWriter(endian: std.builtin.Endian, comptime WriterType: type) type {
+pub fn BitWriter(comptime endian: std.builtin.Endian, comptime WriterType: type) type {
     return struct {
         forward_writer: WriterType,
         bit_buffer: u8,

lib/std/meta.zig

@@ -764,7 +764,7 @@ const TagPayloadType = TagPayload;
 
 ///Given a tagged union type, and an enum, return the type of the union
 /// field corresponding to the enum tag.
-pub fn TagPayload(comptime U: type, tag: Tag(U)) type {
+pub fn TagPayload(comptime U: type, comptime tag: Tag(U)) type {
     comptime debug.assert(trait.is(.Union)(U));
 
     const info = @typeInfo(U).Union;

lib/std/multi_array_list.zig

@@ -459,7 +459,7 @@ pub fn MultiArrayList(comptime S: type) type {
             return self.bytes[0..capacityInBytes(self.capacity)];
         }
 
-        fn FieldType(field: Field) type {
+        fn FieldType(comptime field: Field) type {
             return meta.fieldInfo(S, field).field_type;
         }