Create try_convert extension

GNUmakefile.in

@@ -43,6 +43,7 @@ ifeq ($(with_openssl), yes)
 	$(MAKE) -C contrib/sslinfo all
 endif
 	$(MAKE) -C contrib/tablefunc all
+	$(MAKE) -C contrib/try_convert all
 ifneq ($(with_uuid),no)
 	$(MAKE) -C contrib/uuid-ossp all
 endif
@@ -96,6 +97,7 @@ ifeq ($(with_openssl), yes)
 	$(MAKE) -C contrib/sslinfo $@
 endif
 	$(MAKE) -C contrib/tablefunc $@
+	$(MAKE) -C contrib/try_convert $@
 ifneq ($(with_uuid),no)
 	$(MAKE) -C contrib/uuid-ossp $@
 endif

contrib/Makefile

@@ -43,6 +43,7 @@ SUBDIRS = \
 		test_decoding	\
 		test_parser	\
 		test_shm_mq	\
+		try_convert \
 		tsearch2	\
 		tablefunc	\
 		unaccent

contrib/try_convert/.gitignore

@@ -0,0 +1,4 @@
+# Generated subdirectories
+/results/
+/sql/
+/expected/

contrib/try_convert/Makefile

@@ -0,0 +1,20 @@
+# contrib/try_convert/Makefile
+
+MODULE_big	= try_convert
+OBJS		= try_convert.o $(WIN32RES)
+
+EXTENSION = try_convert
+DATA = try_convert--1.0.sql
+PGFILEDESC = "try_convert - function for type cast"
+REGRESS = try_convert
+
+ifdef USE_PGXS
+PG_CONFIG = pg_config
+PGXS := $(shell $(PG_CONFIG) --pgxs)
+include $(PGXS)
+else
+subdir = contrib/try_convert
+top_builddir = ../..
+include $(top_builddir)/src/Makefile.global
+include $(top_srcdir)/contrib/contrib-global.mk
+endif

contrib/try_convert/data/tt_abstime.data

@@ -0,0 +1,12 @@
+2015-10-28 16:35:45
+1974-02-15 15:52:07
+2019-07-22 23:19:33
+2024-06-24 23:02:00
+1986-12-03 12:16:50
+1982-12-11 19:01:59
+1979-07-17 08:59:54
+1982-06-27 18:52:43
+2001-06-25 20:23:38
+1975-02-17 19:50:17
+2007-06-14 13:50:09
+1973-06-11 12:06:52

contrib/try_convert/data/tt_bit.data

@@ -0,0 +1,11 @@
+1
+0
+1010101
+11001010
+1011011101111
+01001
+1111
+00000000000000000000000
+1111111111111111111
+0101001010101
+11101001000100

contrib/try_convert/data/tt_bool.data

@@ -0,0 +1,19 @@
+f
+true
+t
+false
+t
+t
+f
+t
+False
+t
+f
+True
+TRUE
+f
+f
+1
+0
+f
+FALSE

contrib/try_convert/data/tt_bpchar.data

@@ -0,0 +1,70 @@
+All the world's a stage,
+And all the men and women merely players;
+They have their exits and their entrances,
+And one man in his time plays many parts,
+His acts being seven ages. At first, the infant,
+Mewling and puking in the nurse's arms.
+Then the whining schoolboy, with his satchel
+And shining morning face, creeping like snail
+Unwillingly to school. And then the lover,
+Sighing like furnace, with a woeful ballad
+Made to his mistress' eyebrow. Then a soldier,
+Full of strange oaths and bearded like the pard,
+Jealous in honor, sudden and quick in quarrel,
+Seeking the bubble reputation
+Even in the cannon's mouth. And then the justice,
+In fair round belly with good capon lined,
+With eyes severe and beard of formal cut,
+Full of wise saws and modern instances;
+And so he plays his part. The sixth age shifts
+Into the lean and slippered pantaloon,
+With spectacles on nose and pouch on side;
+His youthful hose, well saved, a world too wide
+For his shrunk shank, and his big manly voice,
+Turning again toward childish treble, pipes
+And whistles in his sound. Last scene of all,
+That ends this strange eventful history,
+Is second childishness and mere oblivion,
+Sans teeth, sans eyes, sans taste, sans everything.
+
+std::to_string
+ C++ Strings library std::basic_string 
+Defined in header <string>
+std::string to_string( int value );
+std::string to_string( long value );
+std::string to_string( long long value );
+std::string to_string( unsigned value );
+std::string to_string( unsigned long value );
+std::string to_string( unsigned long long value );
+std::string to_string( float value );
+std::string to_string( double value );
+std::string to_string( long double value );
+Converts a numeric value to std::string.
+
+Let buf be an internal to the conversion functions buffer, sufficiently large to contain the result of conversion.
+
+1) Converts a signed integer to a string as if by std::sprintf(buf, "%d", value).
+2) Converts a signed integer to a string as if by std::sprintf(buf, "%ld", value).
+3) Converts a signed integer to a string as if by std::sprintf(buf, "%lld", value).
+4) Converts an unsigned integer to a string as if by std::sprintf(buf, "%u", value).
+5) Converts an unsigned integer to a string as if by std::sprintf(buf, "%lu", value).
+6) Converts an unsigned integer to a string as if by std::sprintf(buf, "%llu", value).
+7,8) Converts a floating point value to a string as if by std::sprintf(buf, "%f", value).
+9) Converts a floating point value to a string as if by std::sprintf(buf, "%Lf", value).
+(until C++26)
+1-9) Converts a numeric value to a string as if by std::format("{}", value).
+(since C++26)
+Parameters
+Return value
+A string holding the converted value.
+
+Exceptions
+May throw std::bad_alloc from the std::string constructor.
+
+Notes
+With floating point types std::to_string may yield unexpected results as the number of significant digits in the returned string can be zero, see the example.
+The return value may differ significantly from what std::cout prints by default, see the example.
+std::to_string relies on the current C locale for formatting purposes, and therefore concurrent calls to std::to_string from multiple threads may result in partial serialization of calls.
+The results of overloads for integer types do not rely on the current C locale, and thus implementations generally avoid access to the current C locale in these overloads for both correctness and performance. However, such avoidance is not guaranteed by the standard.
+(until C++26)
+C++17 provides std::to_chars as a higher-performance locale-independent alternative.

contrib/try_convert/data/tt_char.data

@@ -0,0 +1,70 @@
+All the world's a stage,
+And all the men and women merely players;
+They have their exits and their entrances,
+And one man in his time plays many parts,
+His acts being seven ages. At first, the infant,
+Mewling and puking in the nurse's arms.
+Then the whining schoolboy, with his satchel
+And shining morning face, creeping like snail
+Unwillingly to school. And then the lover,
+Sighing like furnace, with a woeful ballad
+Made to his mistress' eyebrow. Then a soldier,
+Full of strange oaths and bearded like the pard,
+Jealous in honor, sudden and quick in quarrel,
+Seeking the bubble reputation
+Even in the cannon's mouth. And then the justice,
+In fair round belly with good capon lined,
+With eyes severe and beard of formal cut,
+Full of wise saws and modern instances;
+And so he plays his part. The sixth age shifts
+Into the lean and slippered pantaloon,
+With spectacles on nose and pouch on side;
+His youthful hose, well saved, a world too wide
+For his shrunk shank, and his big manly voice,
+Turning again toward childish treble, pipes
+And whistles in his sound. Last scene of all,
+That ends this strange eventful history,
+Is second childishness and mere oblivion,
+Sans teeth, sans eyes, sans taste, sans everything.
+
+std::to_string
+ C++ Strings library std::basic_string 
+Defined in header <string>
+std::string to_string( int value );
+std::string to_string( long value );
+std::string to_string( long long value );
+std::string to_string( unsigned value );
+std::string to_string( unsigned long value );
+std::string to_string( unsigned long long value );
+std::string to_string( float value );
+std::string to_string( double value );
+std::string to_string( long double value );
+Converts a numeric value to std::string.
+
+Let buf be an internal to the conversion functions buffer, sufficiently large to contain the result of conversion.
+
+1) Converts a signed integer to a string as if by std::sprintf(buf, "%d", value).
+2) Converts a signed integer to a string as if by std::sprintf(buf, "%ld", value).
+3) Converts a signed integer to a string as if by std::sprintf(buf, "%lld", value).
+4) Converts an unsigned integer to a string as if by std::sprintf(buf, "%u", value).
+5) Converts an unsigned integer to a string as if by std::sprintf(buf, "%lu", value).
+6) Converts an unsigned integer to a string as if by std::sprintf(buf, "%llu", value).
+7,8) Converts a floating point value to a string as if by std::sprintf(buf, "%f", value).
+9) Converts a floating point value to a string as if by std::sprintf(buf, "%Lf", value).
+(until C++26)
+1-9) Converts a numeric value to a string as if by std::format("{}", value).
+(since C++26)
+Parameters
+Return value
+A string holding the converted value.
+
+Exceptions
+May throw std::bad_alloc from the std::string constructor.
+
+Notes
+With floating point types std::to_string may yield unexpected results as the number of significant digits in the returned string can be zero, see the example.
+The return value may differ significantly from what std::cout prints by default, see the example.
+std::to_string relies on the current C locale for formatting purposes, and therefore concurrent calls to std::to_string from multiple threads may result in partial serialization of calls.
+The results of overloads for integer types do not rely on the current C locale, and thus implementations generally avoid access to the current C locale in these overloads for both correctness and performance. However, such avoidance is not guaranteed by the standard.
+(until C++26)
+C++17 provides std::to_chars as a higher-performance locale-independent alternative.

contrib/try_convert/data/tt_cidr.data

@@ -0,0 +1,16 @@
+192.168.100.128/25
+192.168/24
+192.168/25
+192.168.1
+192.168
+128.1
+128
+128.1.2
+10.1.2
+10.1
+10
+10.1.2.3/32
+2001:4f8:3:ba::/64
+2001:4f8:3:ba:2e0:81ff:fe22:d1f1/128
+::ffff:1.2.3.0/120
+::ffff:1.2.3.0/128

contrib/try_convert/data/tt_citext.data

@@ -0,0 +1,70 @@
+All the world's a stage,
+And all the men and women merely players;
+They have their exits and their entrances,
+And one man in his time plays many parts,
+His acts being seven ages. At first, the infant,
+Mewling and puking in the nurse's arms.
+Then the whining schoolboy, with his satchel
+And shining morning face, creeping like snail
+Unwillingly to school. And then the lover,
+Sighing like furnace, with a woeful ballad
+Made to his mistress' eyebrow. Then a soldier,
+Full of strange oaths and bearded like the pard,
+Jealous in honor, sudden and quick in quarrel,
+Seeking the bubble reputation
+Even in the cannon's mouth. And then the justice,
+In fair round belly with good capon lined,
+With eyes severe and beard of formal cut,
+Full of wise saws and modern instances;
+And so he plays his part. The sixth age shifts
+Into the lean and slippered pantaloon,
+With spectacles on nose and pouch on side;
+His youthful hose, well saved, a world too wide
+For his shrunk shank, and his big manly voice,
+Turning again toward childish treble, pipes
+And whistles in his sound. Last scene of all,
+That ends this strange eventful history,
+Is second childishness and mere oblivion,
+Sans teeth, sans eyes, sans taste, sans everything.
+
+std::to_string
+ C++ Strings library std::basic_string 
+Defined in header <string>
+std::string to_string( int value );
+std::string to_string( long value );
+std::string to_string( long long value );
+std::string to_string( unsigned value );
+std::string to_string( unsigned long value );
+std::string to_string( unsigned long long value );
+std::string to_string( float value );
+std::string to_string( double value );
+std::string to_string( long double value );
+Converts a numeric value to std::string.
+
+Let buf be an internal to the conversion functions buffer, sufficiently large to contain the result of conversion.
+
+1) Converts a signed integer to a string as if by std::sprintf(buf, "%d", value).
+2) Converts a signed integer to a string as if by std::sprintf(buf, "%ld", value).
+3) Converts a signed integer to a string as if by std::sprintf(buf, "%lld", value).
+4) Converts an unsigned integer to a string as if by std::sprintf(buf, "%u", value).
+5) Converts an unsigned integer to a string as if by std::sprintf(buf, "%lu", value).
+6) Converts an unsigned integer to a string as if by std::sprintf(buf, "%llu", value).
+7,8) Converts a floating point value to a string as if by std::sprintf(buf, "%f", value).
+9) Converts a floating point value to a string as if by std::sprintf(buf, "%Lf", value).
+(until C++26)
+1-9) Converts a numeric value to a string as if by std::format("{}", value).
+(since C++26)
+Parameters
+Return value
+A string holding the converted value.
+
+Exceptions
+May throw std::bad_alloc from the std::string constructor.
+
+Notes
+With floating point types std::to_string may yield unexpected results as the number of significant digits in the returned string can be zero, see the example.
+The return value may differ significantly from what std::cout prints by default, see the example.
+std::to_string relies on the current C locale for formatting purposes, and therefore concurrent calls to std::to_string from multiple threads may result in partial serialization of calls.
+The results of overloads for integer types do not rely on the current C locale, and thus implementations generally avoid access to the current C locale in these overloads for both correctness and performance. However, such avoidance is not guaranteed by the standard.
+(until C++26)
+C++17 provides std::to_chars as a higher-performance locale-independent alternative.

contrib/try_convert/data/tt_complex.data

@@ -0,0 +1,12 @@
+1.1 + 1.0i
+10.0
+-1213 - 13.342i
+1546i
+0.00004 + 9i
+111111 - 0.00i
+0i
+0
+-111.234
+567.1
+123331
+-2

contrib/try_convert/data/tt_date.data

@@ -0,0 +1,12 @@
+2015-10-28
+1974-02-15
+2019-07-22
+2024-06-24
+1986-12-03
+1982-12-12
+1979-07-17
+1982-06-27
+2001-06-25
+1975-02-18
+2007-06-14
+1973-06-11

contrib/try_convert/data/tt_float4.data

@@ -0,0 +1,24 @@
+5.09526
+0.90909
+0.47116
+1.09649
+62.7446
+79.2079
+42.2159
+6.35277
+381.619
+996.121
+529.114
+971.078
+8607.79
+114.810
+7207.21
+6817.10
+53697.0
+26682.5
+64096.1
+11155.2
+434765
+453723
+953815
+875852