mirror of
https://github.com/Mercury-Language/mercury.git
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a9c76976b4
compiler/indent.m:
Make the indent type a synonym for uint.
compiler/*.m:
Conform to the change above.
239 lines
9.1 KiB
Mathematica
239 lines
9.1 KiB
Mathematica
%---------------------------------------------------------------------------%
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% vim: ft=mercury ts=4 sw=4 et
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%---------------------------------------------------------------------------%
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% Copyright (C) 2000-2012 The University of Melbourne.
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% Copyright (C) 2013-2018 The Mercury team.
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% This file may only be copied under the terms of the GNU General
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% Public License - see the file COPYING in the Mercury distribution.
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%---------------------------------------------------------------------------%
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%
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% Output MLDS function declarations and definitions in Java.
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%
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%---------------------------------------------------------------------------%
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:- module ml_backend.mlds_to_java_func.
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:- interface.
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:- import_module libs.
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:- import_module libs.indent.
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:- import_module ml_backend.mlds.
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:- import_module ml_backend.mlds_to_java_util.
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:- import_module ml_backend.mlds_to_target_util.
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:- import_module io.
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:- import_module list.
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%---------------------------------------------------------------------------%
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:- pred output_func_decl_for_java(java_out_info::in, io.text_output_stream::in,
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indent::in, mlds_function_name::in, output_aux::in, mlds_func_params::in,
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io::di, io::uo) is det.
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% This predicate assumes that our caller
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%
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% - has already printed any needed indentation at the start of the
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% first line, and
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%
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% - it will print the newline after the final parenthesis
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% that is output by this predicate.
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%
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:- pred output_params_for_java(java_out_info::in, io.text_output_stream::in,
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indent::in, list(mlds_argument)::in, io::di, io::uo) is det.
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%---------------------------------------------------------------------------%
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:- pred output_function_defn_for_java(java_out_info::in,
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io.text_output_stream::in, indent::in, output_aux::in,
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mlds_function_defn::in, io::di, io::uo) is det.
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%---------------------------------------------------------------------------%
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%---------------------------------------------------------------------------%
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:- implementation.
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:- import_module hlds.
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:- import_module hlds.hlds_module.
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:- import_module ml_backend.mlds_to_java_name.
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:- import_module ml_backend.mlds_to_java_stmt.
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:- import_module ml_backend.mlds_to_java_type.
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:- import_module parse_tree.
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:- import_module parse_tree.parse_tree_out_info.
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:- import_module parse_tree.prog_data.
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:- import_module bool.
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:- import_module maybe.
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:- import_module string.
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:- import_module uint.
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%---------------------------------------------------------------------------%
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output_func_decl_for_java(Info, Stream, Indent, FuncName, OutputAux,
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Signature, !IO) :-
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Signature = mlds_func_params(Parameters, RetTypes),
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( if
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OutputAux = oa_cname(ClassName, ClassArity),
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FuncName = mlds_function_export("<constructor>")
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then
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ClassNameStr =
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unqual_class_name_to_string_for_java(ClassName, ClassArity),
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io.write_string(Stream, ClassNameStr, !IO)
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else
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output_return_types_for_java(Info, Stream, RetTypes, !IO),
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IndentStr = indent2_string(Indent),
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FuncNameStr = function_name_to_string_for_java(FuncName),
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io.format(Stream, "\n%s%s", [s(IndentStr), s(FuncNameStr)], !IO)
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),
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output_params_for_java(Info, Stream, Indent, Parameters, !IO).
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:- pred output_return_types_for_java(java_out_info::in,
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io.text_output_stream::in, mlds_return_types::in, io::di, io::uo) is det.
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output_return_types_for_java(Info, Stream, RetTypes, !IO) :-
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(
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RetTypes = [],
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io.write_string(Stream, "void", !IO)
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;
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RetTypes = [RetType],
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output_type_for_java(Info, Stream, RetType, !IO)
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;
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RetTypes = [_, _ | _],
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% For multiple outputs, we return an array of objects.
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io.write_string(Stream, "java.lang.Object []", !IO)
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).
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output_params_for_java(Info, Stream, Indent, Parameters, !IO) :-
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io.write_char(Stream, '(', !IO),
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(
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Parameters = []
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;
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Parameters = [_ | _],
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io.nl(Stream, !IO),
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Indent1Str = indent2_string(Indent + 1u),
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write_out_list(output_param(Info, Indent1Str), ",\n", Parameters,
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Stream, !IO)
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),
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io.write_char(Stream, ')', !IO).
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:- pred output_param(java_out_info::in, string::in, mlds_argument::in,
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io.text_output_stream::in, io::di, io::uo) is det.
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output_param(Info, IndentStr, Arg, Stream, !IO) :-
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Arg = mlds_argument(VarName, Type, _GCStmt),
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TypeStr = type_to_string_for_java(Info, Type),
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VarNameStr = local_var_name_to_string_for_java(VarName),
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io.format(Stream, "%s%s %s",
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[s(IndentStr), s(TypeStr), s(VarNameStr)], !IO).
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%---------------------------------------------------------------------------%
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output_function_defn_for_java(Info, Stream, Indent, OutputAux,
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FunctionDefn, !IO) :-
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% Put a blank line before each function definition.
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io.nl(Stream, !IO),
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FunctionDefn = mlds_function_defn(FuncName, Context, Flags,
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MaybePredProcId, Params, MaybeBody,
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_EnvVarNames, _MaybeRequireTailrecInfo),
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(
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MaybeBody = body_external,
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% This is just a function declaration, with no body.
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% Java doesn't support separate declarations and definitions,
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% so just output the declaration as a comment.
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% (Note that the actual definition of an external procedure
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% must be given in `pragma foreign_code' in the same module.)
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%
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% XXX For now, we print only the name of the function.
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% We would like to print the whole declaration in a comment,
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% but that does not work. For some argument types in the function
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% declaration, we may print a comment before the Java type
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% (see type_to_string_for_java). This would yield nested comments,
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% which Java does not allow.
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indent_line_after_context(Stream, Info ^ joi_line_numbers,
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marker_comment, Context, Indent, !IO),
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FuncNameStr = function_name_to_string_for_java(FuncName),
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io.format(Stream, "// external: %s\n", [s(FuncNameStr)], !IO)
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;
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MaybeBody = body_defined_here(_),
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(
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MaybePredProcId = no
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;
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MaybePredProcId = yes(PredProcid),
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IndentStr = indent2_string(Indent),
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maybe_output_pred_proc_id_comment(Stream, Info ^ joi_auto_comments,
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IndentStr, PredProcid, !IO)
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),
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indent_line_after_context(Stream, Info ^ joi_line_numbers,
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marker_comment, Context, Indent, !IO),
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output_function_decl_flags_for_java(Info, Stream, Flags, !IO),
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output_func_for_java(Info, Stream, Indent, FuncName, OutputAux,
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Context, Params, MaybeBody, !IO)
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).
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:- pred output_func_for_java(java_out_info::in, io.text_output_stream::in,
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indent::in, mlds_function_name::in, output_aux::in, prog_context::in,
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mlds_func_params::in, mlds_function_body::in, io::di, io::uo) is det.
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output_func_for_java(Info, Stream, Indent, FuncName, OutputAux, Context,
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Signature, MaybeBody, !IO) :-
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output_func_decl_for_java(Info, Stream, Indent, FuncName, OutputAux,
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Signature, !IO),
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io.write_string(Stream, "\n", !IO),
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(
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MaybeBody = body_external
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% The signature above will be printed inside a comment.
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;
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MaybeBody = body_defined_here(Body),
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FuncInfo = func_info_csj(Signature),
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% Do not place redundant brackets around a block.
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( if Body = ml_stmt_block(_, _, _, _) then
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output_statement_for_java(Info, Stream, Indent, FuncInfo, Body,
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_ExitMethods, !IO)
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else
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IndentStr = indent2_string(Indent),
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io.format(Stream, "%s{\n", [s(IndentStr)], !IO),
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output_statement_for_java(Info, Stream, Indent + 1u, FuncInfo,
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Body, _ExitMethods, !IO),
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indent_line_after_context(Stream, Info ^ joi_line_numbers,
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marker_comment, Context, Indent, !IO),
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io.write_string(Stream, "}\n", !IO)
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)
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).
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%---------------------------------------------------------------------------%
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:- pred output_function_decl_flags_for_java(java_out_info::in,
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io.text_output_stream::in, mlds_function_decl_flags::in,
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io::di, io::uo) is det.
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output_function_decl_flags_for_java(Info, Stream, Flags, !IO) :-
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Flags = mlds_function_decl_flags(Access, PerInstance),
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output_access_for_java(Info, Stream, Access, !IO),
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output_per_instance_for_java(Stream, PerInstance, !IO).
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:- pred output_access_for_java(java_out_info::in, io.text_output_stream::in,
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function_access::in, io::di, io::uo) is det.
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output_access_for_java(_Info, Stream, Access, !IO) :-
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(
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Access = func_public,
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io.write_string(Stream, "public ", !IO)
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;
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Access = func_private,
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io.write_string(Stream, "private ", !IO)
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).
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:- pred output_per_instance_for_java(io.text_output_stream::in,
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per_instance::in, io::di, io::uo) is det.
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output_per_instance_for_java(Stream, PerInstance, !IO) :-
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(
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PerInstance = per_instance
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;
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PerInstance = one_copy,
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io.write_string(Stream, "static ", !IO)
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).
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%---------------------------------------------------------------------------%
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:- end_module ml_backend.mlds_to_java_func.
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%---------------------------------------------------------------------------%
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