mirror of
https://github.com/google/blockly.git
synced 2026-01-06 16:40:07 +01:00
e642a77f5d
Previously a function call with no return value generated: prefix(); suffix(); function(); The intent was so the prefix and suffix calls in the function body wouldn’t overlap with the prefix and suffix calls of the function call. However, this is doomed to be inconsistent with a function call with a return value: prefix(); print(function()); suffix(); Thus since overlaping must exist, both types of function calls should have consistent suffix locations.
126 lines
4.3 KiB
JavaScript
126 lines
4.3 KiB
JavaScript
/**
|
|
* @license
|
|
* Visual Blocks Language
|
|
*
|
|
* Copyright 2016 Google Inc.
|
|
* https://developers.google.com/blockly/
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
/**
|
|
* @fileoverview Generating Lua for procedure blocks.
|
|
* @author rodrigoq@google.com (Rodrigo Queiro)
|
|
*/
|
|
'use strict';
|
|
|
|
goog.provide('Blockly.Lua.procedures');
|
|
|
|
goog.require('Blockly.Lua');
|
|
|
|
|
|
Blockly.Lua['procedures_defreturn'] = function(block) {
|
|
// Define a procedure with a return value.
|
|
var funcName = Blockly.Lua.variableDB_.getName(
|
|
block.getFieldValue('NAME'), Blockly.Procedures.NAME_TYPE);
|
|
var xfix1 = '';
|
|
if (Blockly.Lua.STATEMENT_PREFIX) {
|
|
xfix1 += Blockly.Lua.injectId(Blockly.Lua.STATEMENT_PREFIX, block);
|
|
}
|
|
if (Blockly.Lua.STATEMENT_SUFFIX) {
|
|
xfix1 += Blockly.Lua.injectId(Blockly.Lua.STATEMENT_SUFFIX, block);
|
|
}
|
|
if (xfix1) {
|
|
xfix1 = Blockly.Lua.prefixLines(xfix1, Blockly.Lua.INDENT);
|
|
}
|
|
var loopTrap = '';
|
|
if (Blockly.Lua.INFINITE_LOOP_TRAP) {
|
|
loopTrap = Blockly.Lua.prefixLines(
|
|
Blockly.Lua.injectId(Blockly.Lua.INFINITE_LOOP_TRAP, block),
|
|
Blockly.Lua.INDENT);
|
|
}
|
|
var branch = Blockly.Lua.statementToCode(block, 'STACK');
|
|
var returnValue = Blockly.Lua.valueToCode(block, 'RETURN',
|
|
Blockly.Lua.ORDER_NONE) || '';
|
|
var xfix2 = '';
|
|
if (branch && returnValue) {
|
|
// After executing the function body, revisit this block for the return.
|
|
xfix2 = xfix1;
|
|
}
|
|
if (returnValue) {
|
|
returnValue = Blockly.Lua.INDENT + 'return ' + returnValue + '\n';
|
|
} else if (!branch) {
|
|
branch = '';
|
|
}
|
|
var args = [];
|
|
for (var i = 0; i < block.arguments_.length; i++) {
|
|
args[i] = Blockly.Lua.variableDB_.getName(block.arguments_[i],
|
|
Blockly.Variables.NAME_TYPE);
|
|
}
|
|
var code = 'function ' + funcName + '(' + args.join(', ') + ')\n' +
|
|
xfix1 + loopTrap + branch + xfix2 + returnValue + 'end\n';
|
|
code = Blockly.Lua.scrub_(block, code);
|
|
// Add % so as not to collide with helper functions in definitions list.
|
|
Blockly.Lua.definitions_['%' + funcName] = code;
|
|
return null;
|
|
};
|
|
|
|
// Defining a procedure without a return value uses the same generator as
|
|
// a procedure with a return value.
|
|
Blockly.Lua['procedures_defnoreturn'] =
|
|
Blockly.Lua['procedures_defreturn'];
|
|
|
|
Blockly.Lua['procedures_callreturn'] = function(block) {
|
|
// Call a procedure with a return value.
|
|
var funcName = Blockly.Lua.variableDB_.getName(
|
|
block.getFieldValue('NAME'), Blockly.Procedures.NAME_TYPE);
|
|
var args = [];
|
|
for (var i = 0; i < block.arguments_.length; i++) {
|
|
args[i] = Blockly.Lua.valueToCode(block, 'ARG' + i,
|
|
Blockly.Lua.ORDER_NONE) || 'nil';
|
|
}
|
|
var code = funcName + '(' + args.join(', ') + ')';
|
|
return [code, Blockly.Lua.ORDER_HIGH];
|
|
};
|
|
|
|
Blockly.Lua['procedures_callnoreturn'] = function(block) {
|
|
// Call a procedure with no return value.
|
|
// Generated code is for a function call as a statement is the same as a
|
|
// function call as a value, with the addition of line ending.
|
|
var tuple = Blockly.Lua['procedures_callreturn'](block);
|
|
return tuple[0] + '\n';
|
|
};
|
|
|
|
Blockly.Lua['procedures_ifreturn'] = function(block) {
|
|
// Conditionally return value from a procedure.
|
|
var condition = Blockly.Lua.valueToCode(block, 'CONDITION',
|
|
Blockly.Lua.ORDER_NONE) || 'false';
|
|
var code = 'if ' + condition + ' then\n';
|
|
if (Blockly.Lua.STATEMENT_SUFFIX) {
|
|
// Inject any statement suffix here since the regular one at the end
|
|
// will not get executed if the return is triggered.
|
|
code += Blockly.Lua.prefixLines(
|
|
Blockly.Lua.injectId(Blockly.Lua.STATEMENT_SUFFIX, block),
|
|
Blockly.Lua.INDENT);
|
|
}
|
|
if (block.hasReturnValue_) {
|
|
var value = Blockly.Lua.valueToCode(block, 'VALUE',
|
|
Blockly.Lua.ORDER_NONE) || 'nil';
|
|
code += Blockly.Lua.INDENT + 'return ' + value + '\n';
|
|
} else {
|
|
code += Blockly.Lua.INDENT + 'return\n';
|
|
}
|
|
code += 'end\n';
|
|
return code;
|
|
};
|