* fix #5013 * disallow statement in the expression
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@ -1267,15 +1267,6 @@
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if (!props && base instanceof Value) {
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return base;
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}
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if (base instanceof Parens && base.contains(function(n) {
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return n instanceof StatementLiteral;
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})) {
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// When `Parens` block includes a `StatementLiteral` (e.g. `(b; break) for a in arr`),
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// it won't compile since `Parens` (`(b; break)`) is compiled as `Value` and
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// pure statement (`break`) can't be used in an expression.
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// For this reasons, we return `Block` instead of `Parens`.
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return base.unwrap();
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}
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this.base = base;
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this.properties = props || [];
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if (tag) {
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@ -863,11 +863,6 @@ exports.Value = class Value extends Base
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constructor: (base, props, tag, isDefaultValue = no) ->
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super()
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return base if not props and base instanceof Value
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# When `Parens` block includes a `StatementLiteral` (e.g. `(b; break) for a in arr`),
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# it won't compile since `Parens` (`(b; break)`) is compiled as `Value` and
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# pure statement (`break`) can't be used in an expression.
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# For this reasons, we return `Block` instead of `Parens`.
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return base.unwrap() if base instanceof Parens and base.contains (n) -> n instanceof StatementLiteral
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@base = base
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@properties = props or []
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@[tag] = yes if tag
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@ -1112,37 +1112,6 @@ test "#3921: `switch`", ->
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else "none"
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eq "five", c
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# Issue #3441: Parentheses wrapping expression throw invalid error in `then` clause
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test "#3441: `StatementLiteral` in parentheses", ->
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i = 0
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r1 = ((i++; break) while i < 10)
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arrayEq r1, []
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i = 0
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r2 = ((i++; continue) while i < 10)
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arrayEq r2, []
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i = 0
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r4 = while i < 10 then (i++; break)
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arrayEq r4, []
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i = 0
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r5 = while i < 10 then (i++; continue)
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arrayEq r5, []
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arr = [0..9]
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r6 = ((a; break) for a in arr)
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arrayEq r6, []
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r7 = ((a; continue) for a in arr)
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arrayEq r7, []
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r8 = for a in arr then (a; break)
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arrayEq r8, []
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r9 = for a in arr then (a; continue)
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arrayEq r9, []
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# Issue #3909: backslash to break line in `for` loops throw syntax error
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test "#3909: backslash `for own ... of`", ->
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@ -962,6 +962,42 @@ test "#4097: `yield return` as an expression", ->
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^^^^^^^^^^^^
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'''
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test "#5013: `await return` as an expression", ->
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assertErrorFormat '''
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-> (await return)
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''', '''
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[stdin]:1:5: error: cannot use a pure statement in an expression
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-> (await return)
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^^^^^^^^^^^^
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'''
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test "#5013: `return` as an expression", ->
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assertErrorFormat '''
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-> (return)
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''', '''
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[stdin]:1:5: error: cannot use a pure statement in an expression
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-> (return)
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^^^^^^
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'''
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test "#5013: `break` as an expression", ->
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assertErrorFormat '''
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(b = 1; break) for b in a
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''', '''
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[stdin]:1:9: error: cannot use a pure statement in an expression
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(b = 1; break) for b in a
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^^^^^
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'''
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test "#5013: `continue` as an expression", ->
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assertErrorFormat '''
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(b = 1; continue) for b in a
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''', '''
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[stdin]:1:9: error: cannot use a pure statement in an expression
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(b = 1; continue) for b in a
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^^^^^^^^
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'''
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test "`&&=` and `||=` with a space in-between", ->
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assertErrorFormat '''
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a = 0
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