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Implement lexer int128 support #11571

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Dec 18, 2021
Merged

Implement lexer int128 support #11571

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128d1ac
Implement lexer int128 support
BlobCodes Dec 11, 2021
043f9f1
format code
BlobCodes Dec 11, 2021
3e5399b
Show integer not fitting in U/Int128 on failed conversion
BlobCodes Dec 12, 2021
6e1f0c3
Try conversion to decimal using u64 before using u128
BlobCodes Dec 12, 2021
7c58a92
Add i128 support in MathInterpreter
BlobCodes Dec 12, 2021
7e7e172
Remove everything not lexer-related
BlobCodes Dec 12, 2021
e25b754
Apply rules from discussion in #8373
BlobCodes Dec 12, 2021
92728ef
Add comment about reasoning behind using u64 for base 10 conversion f…
BlobCodes Dec 13, 2021
a9dc57c
Add old specs
BlobCodes Dec 13, 2021
36707d0
Merge branch 'crystal-lang:master' into feature/lexer-int128-support
BlobCodes Dec 16, 2021
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49 changes: 33 additions & 16 deletions spec/compiler/lexer/lexer_spec.cr
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Original file line number Diff line number Diff line change
Expand Up @@ -302,16 +302,33 @@ describe "Lexer" do
assert_syntax_error "18446744073709551616_i32", "18446744073709551616 doesn't fit in an Int32"
assert_syntax_error "9999999999999999999_i32", "9999999999999999999 doesn't fit in an Int32"

assert_syntax_error "-9999999999999999999", "-9999999999999999999 doesn't fit in an Int64"
assert_syntax_error "-99999999999999999999", "-99999999999999999999 doesn't fit in an Int64"
assert_syntax_error "-11111111111111111111", "-11111111111111111111 doesn't fit in an Int64"
assert_syntax_error "-9223372036854775809", "-9223372036854775809 doesn't fit in an Int64"
assert_syntax_error "18446744073709551616", "18446744073709551616 doesn't fit in an UInt64"

assert_syntax_error "9223372036854775808_i128", "9223372036854775808 doesn't fit in an Int64. Int128 literals that don't fit in an Int64 are currently not supported"
assert_syntax_error "-9223372036854775809_i128", "-9223372036854775809 doesn't fit in an Int64. Int128 literals that don't fit in an Int64 are currently not supported"
assert_syntax_error "118446744073709551616_u128", "118446744073709551616 doesn't fit in an UInt64. UInt128 literals that don't fit in an UInt64 are currently not supported"
assert_syntax_error "18446744073709551616_u128", "18446744073709551616 doesn't fit in an UInt64. UInt128 literals that don't fit in an UInt64 are currently not supported"
assert_syntax_error "-9999999999999999999", "-9999999999999999999 doesn't fit in an Int64, try using the suffix i128"
assert_syntax_error "-99999999999999999999", "-99999999999999999999 doesn't fit in an Int64, try using the suffix i128"
assert_syntax_error "-11111111111111111111", "-11111111111111111111 doesn't fit in an Int64, try using the suffix i128"
assert_syntax_error "-9223372036854775809", "-9223372036854775809 doesn't fit in an Int64, try using the suffix i128"
assert_syntax_error "118446744073709551616", "118446744073709551616 doesn't fit in an UInt64, try using the suffix i128"
assert_syntax_error "18446744073709551616", "18446744073709551616 doesn't fit in an UInt64, try using the suffix i128"

assert_syntax_error "340282366920938463463374607431768211456", "340282366920938463463374607431768211456 doesn't fit in an UInt64"
assert_syntax_error "-170141183460469231731687303715884105729", "-170141183460469231731687303715884105729 doesn't fit in an Int64"
assert_syntax_error "-999999999999999999999999999999999999999", "-999999999999999999999999999999999999999 doesn't fit in an Int64"

assert_syntax_error "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF doesn't fit in an UInt64"
assert_syntax_error "0o7777777777777777777777777777777777777777777777777", "0o7777777777777777777777777777777777777777777777777 doesn't fit in an UInt64"
assert_syntax_error "-0o7777777777777777777777777777777777777777777777777", "-0o7777777777777777777777777777777777777777777777777 doesn't fit in an Int64"

it_lexes_number :i128, ["9223372036854775808_i128", "9223372036854775808"]
it_lexes_number :i128, ["-9223372036854775809_i128", "-9223372036854775809"]
it_lexes_number :u128, ["118446744073709551616_u128", "118446744073709551616"]
it_lexes_number :u128, ["18446744073709551616_u128", "18446744073709551616"]
it_lexes_number :i128, ["170141183460469231731687303715884105727_i128", "170141183460469231731687303715884105727"]
it_lexes_number :u128, ["170141183460469231731687303715884105728_u128", "170141183460469231731687303715884105728"]
it_lexes_number :u128, ["340282366920938463463374607431768211455_u128", "340282366920938463463374607431768211455"]
it_lexes_number :u128, ["0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF_u128", "340282366920938463463374607431768211455"]
it_lexes_number :i128, ["-0x80000000000000000000000000000000_i128", "-170141183460469231731687303715884105728"]
assert_syntax_error "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF doesn't fit in an UInt64, try using the suffix u128"
assert_syntax_error "-0x80000000000000000000000000000000", "-0x80000000000000000000000000000000 doesn't fit in an Int64, try using the suffix i128"
assert_syntax_error "-0x80000000000000000000000000000001", "-0x80000000000000000000000000000001 doesn't fit in an Int64"
assert_syntax_error "-1_u128", "Invalid negative value -1 for UInt128"

assert_syntax_error "1__1", "consecutive underscores in numbers aren't allowed"
Expand Down Expand Up @@ -351,17 +368,17 @@ describe "Lexer" do
it_lexes_u64 [["0xffff_ffff_ffff_ffff", "18446744073709551615"], ["0o177777_77777777_77777777", "18446744073709551615"], ["0b11111111_11111111_11111111_11111111_11111111_11111111_11111111_11111111", "18446744073709551615"]]
it_lexes_u64 [["0x00ffffffffffffffff", "18446744073709551615"], ["0o001777777777777777777777", "18446744073709551615"], ["0b001111111111111111111111111111111111111111111111111111111111111111", "18446744073709551615"]]
# 2**64
assert_syntax_error "0x10000_0000_0000_0000", "0x10000_0000_0000_0000 doesn't fit in an UInt64"
it_lexes_number :i128, ["0x10000_0000_0000_0000_i128", "18446744073709551616"]
assert_syntax_error "0x10000_0000_0000_0000_u64", "0x10000_0000_0000_0000 doesn't fit in an UInt64"
assert_syntax_error "0xfffffffffffffffff_u64", "0xfffffffffffffffff doesn't fit in an UInt64"
assert_syntax_error "0o200000_00000000_00000000", "0o200000_00000000_00000000 doesn't fit in an UInt64"
assert_syntax_error "0b100000000_00000000_00000000_00000000_00000000_00000000_00000000_00000000", "0b100000000_00000000_00000000_00000000_00000000_00000000_00000000_00000000 doesn't fit in an UInt64"
assert_syntax_error "0o200000_00000000_00000000_u64", "0o200000_00000000_00000000 doesn't fit in an UInt64"
assert_syntax_error "0b100000000_00000000_00000000_00000000_00000000_00000000_00000000_00000000_u64", "0b100000000_00000000_00000000_00000000_00000000_00000000_00000000_00000000 doesn't fit in an UInt64"
# Very large
assert_syntax_error "0x1afafafafafafafafafafaf", "0x1afafafafafafafafafafaf doesn't fit in an UInt64"
assert_syntax_error "0x1afafafafafafafafafafafu64", "0x1afafafafafafafafafafaf doesn't fit in an UInt64"
assert_syntax_error "0x1afafafafafafafafafafafi32", "0x1afafafafafafafafafafaf doesn't fit in an Int32"
assert_syntax_error "0o1234567123456712345671234567", "0o1234567123456712345671234567 doesn't fit in an UInt64"
assert_syntax_error "0o1234567123456712345671234567u64", "0o1234567123456712345671234567 doesn't fit in an UInt64"
assert_syntax_error "0o12345671234567_12345671234567_i8", "0o12345671234567_12345671234567 doesn't fit in an Int8"
assert_syntax_error "0b100000000000000000000000000000000000000000000000000000000000000000", "0b100000000000000000000000000000000000000000000000000000000000000000 doesn't fit in an UInt64"
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assert_syntax_error "0b100000000000000000000000000000000000000000000000000000000000000000u64", "0b100000000000000000000000000000000000000000000000000000000000000000 doesn't fit in an UInt64"

it_lexes_i64 [["0o700000000000000000000", "8070450532247928832"]]
it_lexes_u64 [["0o1000000000000000000000", "9223372036854775808"]]
Expand Down
6 changes: 2 additions & 4 deletions src/compiler/crystal/codegen/codegen.cr
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Expand Up @@ -475,11 +475,9 @@ module Crystal
when :u64
@last = int64(node.value.to_u64)
when :i128
# TODO: implement String#to_i128 and use it
@last = int128(node.value.to_i64)
@last = int128(node.value.to_i128)
when :u128
# TODO: implement String#to_u128 and use it
@last = int128(node.value.to_u64)
@last = int128(node.value.to_u128)
when :f32
@last = float32(node.value)
when :f64
Expand Down
36 changes: 23 additions & 13 deletions src/compiler/crystal/syntax/lexer.cr
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Expand Up @@ -1450,24 +1450,24 @@ module Crystal
@token.raw = ":#{value}" if @wants_raw
end

macro gen_check_int_fits_in_size(type, method, size, number_size, raw_number_string, start, pos_before_suffix, negative, actual_type = nil)
macro gen_check_int_fits_in_size(type, method, size, number_size, raw_number_string, start, pos_before_suffix, negative)
{% if type.stringify.starts_with? "U" %}
raise "Invalid negative value #{string_range({{start}}, {{pos_before_suffix}})} for {{type}}", @token, (current_pos - {{start}}) if {{negative}}
{% end %}

if [email protected] || {{number_size}} > {{size}} || ({{number_size}} == {{size}} && {{raw_number_string}}.to_{{method.id}}? == nil)
{% if actual_type.nil? %}
raise_value_doesnt_fit_in "{{type}}", {{start}}, {{pos_before_suffix}}
{% else %}
raise("#{string_range({{start}}, {{pos_before_suffix}})} doesn't fit in an {{actual_type}}. {{type}} literals that don't fit in an {{actual_type}} are currently not supported", @token, current_pos - {{start}})
{% end %}
raise_value_doesnt_fit_in "{{type}}", {{start}}, {{pos_before_suffix}}
end
end

def raise_value_doesnt_fit_in(type, start, pos_before_suffix)
raise "#{string_range(start, pos_before_suffix)} doesn't fit in an #{type}", @token, (current_pos - start)
end

def raise_value_doesnt_fit_in(type, start, pos_before_suffix, alternative)
raise "#{string_range(start, pos_before_suffix)} doesn't fit in an #{type}, try using the suffix #{alternative}", @token, (current_pos - start)
end

private def scan_number(start, negative = false)
@token.type = :NUMBER
base = 10
Expand Down Expand Up @@ -1549,6 +1549,7 @@ module Crystal
@token.value = raw_number_string
else
base10_number_string = raw_number_string.to_u64?(base: base, underscore: true).try &.to_s
base10_number_string ||= raw_number_string.to_u128?(base: base, underscore: true).try &.to_s
if base10_number_string
number_size = base10_number_string.size
first_byte = @reader.string.byte_at(start).chr
Expand All @@ -1574,17 +1575,26 @@ module Crystal
if raw_number_string.to_i64?
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:i64
elsif negative
raise_value_doesnt_fit_in(Int64, start, pos_before_suffix)
raise_value_doesnt_fit_in(Int64, start, pos_before_suffix, "i128")
else
:u64
end
when 20
raise_value_doesnt_fit_in(Int64, start, pos_before_suffix) if negative
raise_value_doesnt_fit_in(UInt64, start, pos_before_suffix) unless raw_number_string.to_u64?
raise_value_doesnt_fit_in(Int64, start, pos_before_suffix, "i128") if negative
raise_value_doesnt_fit_in(UInt64, start, pos_before_suffix, "i128") unless raw_number_string.to_u64?
:u64
when 21..38
raise_value_doesnt_fit_in(negative ? Int64 : UInt64, start, pos_before_suffix, "i128")
when 39
if raw_number_string.to_i128?
raise_value_doesnt_fit_in(negative ? Int64 : UInt64, start, pos_before_suffix, "i128")
elsif raw_number_string.to_u128?
raise_value_doesnt_fit_in(UInt64, start, pos_before_suffix, "u128")
else
raise_value_doesnt_fit_in(negative ? Int64 : UInt64, start, pos_before_suffix)
end
else
raise_value_doesnt_fit_in(Int64, start, pos_before_suffix) if negative
raise_value_doesnt_fit_in(UInt64, start, pos_before_suffix)
raise_value_doesnt_fit_in(negative ? Int64 : UInt64, start, pos_before_suffix)
end
else
case @token.number_kind
Expand All @@ -1596,8 +1606,8 @@ module Crystal
when :u32 then gen_check_int_fits_in_size(UInt32, :u32, 10, number_size, raw_number_string, start, pos_before_suffix, negative)
when :i64 then gen_check_int_fits_in_size(Int64, :i64, 19, number_size, raw_number_string, start, pos_before_suffix, negative)
when :u64 then gen_check_int_fits_in_size(UInt64, :u64, 20, number_size, raw_number_string, start, pos_before_suffix, negative)
when :i128 then gen_check_int_fits_in_size(Int128, :i64, 19, number_size, raw_number_string, start, pos_before_suffix, negative, Int64)
when :u128 then gen_check_int_fits_in_size(UInt128, :u64, 20, number_size, raw_number_string, start, pos_before_suffix, negative, UInt64)
when :i128 then gen_check_int_fits_in_size(Int128, :i128, 39, number_size, raw_number_string, start, pos_before_suffix, negative)
when :u128 then gen_check_int_fits_in_size(UInt128, :u128, 39, number_size, raw_number_string, start, pos_before_suffix, negative)
end
end
end
Expand Down